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 Source: https://www.eurocontrol.int/airial/

 AIRIAL
 EUROCONTROL Air Navigation Inter-site
 Acronym List

 AIRIAL lists abbreviations and acronyms used in EUROCONTROL documents and publications.
 This PDF version is generated automatically from the AIRIAL online database (hyperlink) as
 regularly updated.

 User input is an important part of the AIRIAL system. Should you have any feedback (new
 acronyms for inclusion in the list or proposals for corrections or amendments), please use the 'Add
 New' function available on the AIRIAL webpage, or contact us at airial@eurocontrol.int
 

The AIRIAL Editorial Board:
* Denis Deramaut (Central Flow Management Unit)
* Robin Deransy (EUROCONTROL Experimental Centre)
* Angela Friesen (Directorate Resources)
* Michel Nicolay (Maastricht Upper Area Control Centre)
* Rik Simoens (EUROCONTROL Institute of Air Navigation Services)
* Lut Stessens (Maastricht Upper Area Control Centre)
* Mark Whitely (Corporate Network Design)
* Stephen Fairhurst (AIRIAL Project Manager)

 Browsing of the material available on the EUROCONTROL site (including the copying of such
 material in RAM or other temporary forms of storage necessary to facilitate such browsing) is
 authorised. Reproduction is authorised for personal use only provided the source is duly
 acknowledged.All other uses are prohibited.

 Information on air navigation and air traffic control does not engage the responsibility of the
 European Organisation for the Safety of Air Navigation. While our goal is to keep this information
 timely and accurate, we cannot guarantee either. If errors are brought to our attention, we will
 endeavour to correct them.

 EUROCONTROL AIRIAL
 Acronym list

 Acronym Full form
 (M)FLOPS (Million) Floating Point Operations per Second
 2-D Two Dimensional
 2B1Q 2 Binary 1 Quaternary
 2W 2wire
 3-D 3-Dimensional
 3A Mode 3 or Mode A (Classical SSR Reports)
 3A/C Mode 3A and Mode C Classical SSR
 3D three dimensional
 4-MAST 4-MAST Group
 4B3T 4 Binary 3 Ternary
 4D four dimensional
 4D-CARMA 4 Dimensional Cooperative Arrival Manager
 4D-NAV 4-D (four dimensional) Navigation
 4DPP 4D Trajectory Flight Profile Calculation for planning purposes Service
 4EC Initiative Four En-Route Centre Initiative
 4GL Fourth Generation Language
 4NSAs Four States National Supervisory Authorities (MUAC)
 4W 4wire
 5GSO Group of Senior Officials - Four States and Maastricht UAC ANSPs (5GSO)
 5LNC unique five-letter pronounceable "name-code"
 5Nm 5 Nautical Miles
 5ST-RSG Five-States Route Structure Group
 5YP 5 Year Plan
 8.33 CP 8.33 Contact Person
 8.33 PMC 8.33 Programme Management Cell
 8.33 State A State initially implementing 8.33 kHz channel spacing
 96RIF Radio Interface
 @PEOC Pan European Outsourcing Consortium (now replaced by @HELIOS)
 _ (rho) Symbol for Range
 A Austria
 Page 3
 EUROCONTROL AIRIAL
 Acronym Full form
 A Analysis (SASS-C)
 A ampere
 A-AMGCS Advanced Air Movement Guidance and Control System
 A-CDM Airport Collaborative Decision Making (Prise de décision en collaboration aux aéroports)
 A-CLDL Acknowledged Connectionless Data Link
 A-CWP Advanced Controller Working Position
 A-DPI Airport-Departure Planning Information
 A-ENPRM Advanced - EUROCONTROL Notice of Proposed Rule-Making (Avis de proposition de réglementation
 d'EUROCONTROL - Préliminaire)
 A-G Air to Ground
 A-iCWP Advanced integrated Tower Controller Working Position
 A-ITSM Agency IT service management system
 A-law PCM companding algorithm used in Europe
 A-NPA Advance Notice of Proposed Amendment
 A-PNT Alternative Positioning Navigation and Timing
 A-QPSK Aviation Quadrature Phase Shift Keying
 A-RNP 1 Advanced-RNP 1
 A-S Anti-Spoofing
 A-S Anti-Spoofing Mode
 A-SMGCS Advanced Surface Movement Guidance and Control System (Système avancé de guidage et de contrôle des
 mouvements en surface)
 a.m. Anti Meridiem
 A/A Air to Air
 A/A Air/Air
 A/A Air-Air
 A/C Aircraft
 A/C Aircraft Call
 A/C Alpha/Charlie
 A/C/S Alpha / Charlie / Select
 A/D Analogue to Digital (converter)
 A/G Air-Ground
 A/G Air/Ground
 A/G Air to Ground
 A/GCS Air/Ground Communications Sublayer
 A/I Accident(s)/Incident(s)
 Page 4
 EUROCONTROL AIRIAL
 Acronym Full form
 A/L Auto Land
 a/m Above-mentioned
 A/N Affirm/Negative (CPDLC Response Value)
 A/P Autopilot
 A/T Auto throttle
 A/THR Autothrottle/autothrust
 A/V Aircraft/Vehicle
 A300 Network Identity of the Frankfurt AFTN switching centre (now=DAKOS)
 A319 Airbus 319 Aircraft
 A320 Airbus 320 Aircraft
 A4E Airlines for Europe
 A6 A6 Alliance
 AA Address Announced
 AA Approved Agency
 AA Active
 AA Aircraft Address
 AA Autonomous Aircraft
 AA Approved Agencies (Agencies authorised to bid for TSAs)
 AAA Advanced Airborne Applications (6th FP Integrated Project)
 AAA AIP Audit Assistant
 AAA Advanced ATC System Amsterdam / Contrôle régional avancé d'Amsterdam
 AAAV Azienda Autonoma di Assistenza al Volo
 AAAVTAG Azienda Autonoma Assistenza al Volo per il Traffico Aereo Generale (IT)
 AAB AIM Advisory Board
 AAB Agency Advisory Body (conseil consultatif de l'Agence)
 AABI Aviation Accreditation Board International
 AAC Airline Administrative Communication
 AAC Aeronautical Administrative Communication
 AAC Alpha Attenuation Coefficient
 AAC Autorité/administration de l'aviation civile (Civil Aviation Authority - CAA)
 AAC Airline Administrative Control
 AACE Airfield Approach Control Element
 AACI Airports Association Council International
 AACO Arab Air Carriers Organisation
 Page 5
 EUROCONTROL AIRIAL
 Acronym Full form
 AAD Assigned Altitude Deviation
 AADP ATC Advanced Data Processing
 AAF Advanced Added Functions
 AAF ATM Added Functions
 AAF Auxiliary Airfield
 AAFCE Allied Air Forces Central Europe
 AAFG ATM Added Functionality Sub-Group
 AAFT ATM Added Functionality Sub-Group
 AAG AIS Automation Group (Groupe de travail sur l'automatisation de l'AIS) (EANPG)
 AAG AIS Automation Group
 AAGDI Automated Air/Ground Data Interchange
 AAGR Average Annual Growth Rate
 AAH Autonomous Aircraft Hybrid
 AAI Airports Authority of India
 AAI Average Arrival Interval
 AAIASB (Greek) Air Accident Investigation and Aviation Safety Board
 AAIB Air Accidents Investigation Branch (AAIB)
 AAIM Aircraft Autonomous Integrity Monitoring
 AAIS Automated AIS
 AAIU Air Accident Investigation Unit
 AAL Above Aerodrome Level
 AAL ATM Adaptation Layer
 AALS Advanced Approach and Landing System
 AAM Airport Airside Model (Airport Airside Management High-Level Model) (Modèle de haut niveau de gestion des
 aéroports côté piste)
 AAM Airline Administration Message
 AAMS Advanced Airspace Management System
 AAMS Airport Airside Management Systems (Système de gestion des aéroports côté piste)
 AAP Advanced Automation Program (US)
 AAPF Advanced ATM Planning Function
 aapfg A-SMGCS ATM PROCEDURES FOCUS GROUP
 AAR Airport Acceptance Rate or Airport Arrival Rate
 AAR Air-to-Air Refuelling
 AAS Aerodrome Advisory Service
 Page 6
 EUROCONTROL AIRIAL
 Acronym Full form
 AAS Airspace Architectural Study
 AAS Advanced Automation System (USA)
 AAS Airborne Approach Spacing
 AAS Advanced Airspace Scheme (Schéma évolué de l'espace aérien)
 AASC European Airworthiness Authorities Steering Committee
 AASI Aeronautical Applications Service Interface
 AASR Airways and Airport Surveillance Radar
 AAT Active Aircraft Table
 AAT Alpha Attenuation Test
 AAT Assigned Arrival Time
 AAT Aircraft Assignment Tool
 AATIP ASEAN Air Transport Integration Project
 AATMS Advanced Air Traffic Management System
 AATOT Anticipated Actual Take-Off Time
 AATT Advanced Air Transportation Technologies
 AAUI Aeronautical Applications User Interface
 AB Airblock
 AB Action Button (Mouse / Trackball)
 AB Audit Board
 AB TF Audit Board Task Force / Équipe spéciale "Mission d'audit"
 ABACUS Advanced Billing And Claims Unified System (CRCO)
 ABAS Aircraft-Based Augmentation System (EGNOS) - système de renforcement embarqué
 ABB Activity-Based Budget
 ABC Advanced Booking Charter
 ABC ATC Bypass Complex (MADAP)
 ABCD Aircraft-Based Concept Development
 ABCO absence contractor (absence personnel externe) (CHRONOTIME)
 ABD Agency Board of the Directors
 ABEND ABnormal END (of system operation)
 ABES ABnormal and Emergency Situations
 ABFG ATM Basic Functionality Sub-Group (Sous-groupe "Fonctions ATM de base")
 ABI Advance Boundary Information (Message Type Designator)
 ABM Asynchronous Balanced Mode
 ABM ABeaM
 Page 7
 EUROCONTROL AIRIAL
 Acronym Full form
 ABN Aerodrome BeacoN
 ABO Accrued Benefits Obligation
 ABP Agency Business Plan (plan stratégique de l'Agence)
 ABPSK Aviation Binary Phase Shift Keying
 ABPWG ANSB Business Planning Working Group (Groupe de travail de l'ANSB sur la planification stratégique)
 ABR Available Bit Rate
 ABRD Automatic Baud Rate Detection
 ABT ABouT
 AC Airworthiness codes
 AC Alto Cumulus
 AC Aircraft Commander
 AC Aircraft Characteristics (aircraft type + performance, ENV entity type, used in all CHMI)
 AC Alternating Current
 AC Assistant Controller
 AC Access Control
 AC Association Control
 AC Attack Computer (Eurofighter)
 AC Assessment Centre
 AC All-Call
 AC autorité compétente (Competent Authority - CA)
 AC Advisory Circular
 AC Altitude Code (field)
 AC Aircraft
 AC/NAC AirCraft, Non-AirCraft (ARTAS)
 ACA AUP / UUP Message Composition Application
 ACA Air Traffic Centre Architecture (RADNET)
 ACA Alternate Controller Attachment (feature)
 ACA Airport Coordinators Association
 ACA Address Compression Algorithm
 ACA AUP/UUP Compilation Application (Software)
 ACA Airport Carbon Accreditation
 ACA Airspace Control Activity
 ACA ATC Centre Communication Architecture
 ACAC African Aviation Commission
 Page 8
 EUROCONTROL AIRIAL
 Acronym Full form
 ACAC Arab Civil Aviation Commission (Commission arabe de l'aviation civile)
 ACAD Auto Computer Aided Design (Operator-Input + Display System)
 Acad Academic establishments
 ACAF ATM Common Assessment Framework
 ACAG Airspace Coordination Agencies
 ACAM Airport Capacity Modelling Task Force
 ACAM Airport Capacity Airside Modelling
 ACAP Airport capacity and runway utilisation (Exploitation de la capacité des aéroports et utilisation des pistes)
 ACARE Advisory Council for Aeronautics Research in Europe (Conseil consultatif pour la recherche aéronautique en
 Europe)
 ACARS Aircraft Communications, Addressing and Reporting System (Système embarqué de communications,
 d'adressage et de compte rendu)
 ACAS Airborne Collision Avoidance System (Système anticollision embarqué)
 ACAS I Aircraft Collision Avoidance System Version 1
 ACAS II Aircraft Collision Avoidance System Version 2
 ACAS III Aircraft Collision Avoidance System Version 3
 ACAS RA ACAS Resolution Advisory (Avis de résolution ACAS)
 ACAS X Airborne Collision Avoidance System X (FAA)
 ACAS Xu/sXu versions of ACAS X dedicated to RPAS
 ACASA ACAS Analysis (Analyse ACAS)
 ACATF ATC Centre Communications Architecture Task Force
 ACB Address Check Boundary
 ACC Group of Experts on Accident Investigation (ICAO)
 ACC Approach Control Centre (Centre de contrôle d'approche)
 ACC ACCeptance phase
 ACC Area Control Centre (centre de contrôle régional - CCR)
 ACC Controller Area Controller
 ACC Loop Anticipation-Action-Comparison Loop
 ACC-PC ACC Planning Controller
 ACC-TC ACC Tactical Controller
 ACC3 Air Cargo or Mail Carrier operating into the Union from a Third Country Airport
 ACCA Air Charter Carriers Association
 ACCAPEG Aviation and Climate Change Action Plan Expert Group
 ACCATF Equipe spéciale 'Architecture des communications des centres ATC'
 ACCB AIXM Change Control Board (Comité de suivi des modifications de l'AIXM)
 Page 9
 EUROCONTROL AIRIAL
 Acronym Full form
 ACCD Advanced Continuous Climb Departure
 ACCEL Accelerate
 ACCES ACC assessing capacity method
 ACCESS Aircraft Control Console for Experiments and Simulations Studies
 ACCID notification of aircraft ACCIDent
 ACCS Air Command and Control System (NATO)
 ACDA Advanced Continuous Descent Approach
 ACDB Agency Contact Data Base
 ACDMD Air Collaborative Decision Making Demonstrator
 ACDT accident (CHRONOTIME)
 ACE ATM/CNS Systems Enginnering (EEC)
 ACE Altimeter Control Equipment
 ACE ATM Cooperation and Coordination in South Eastern Europe (Coopération et coordination ATM dans le Sud-
 Est de l'Europe)
 ACE Airport Airside Capacity Enhancement (Amélioration de la capacité aéroportuaire côté piste)
 ACE AVENUE-Compliant ESCAPE
 ACE Association des Compagnies Aériennes de la Communauté Européenne
 ACE Allied Command Europe
 ACE Angiotensin Converting Enzyme
 ACE ATM Cost-Effectiveness
 ACE ATC Communications Environment
 ACE WG ATM Cost-Effectiveness Working Group (Groupe de travail sur l'efficacité économique de l'ATM)
 ACELP Adaptative Code Excited Linear Prediction
 ACF Airline Consultation Forum (Forum de consultation des compagnies aériennes)
 ACF Area Control Facility. See ACC or ARTCC
 ACF ACARS Convergence Function
 ACF Advanced Communications Function
 ACF Avion de Combat Futur (FR)
 ACFT Aircraft
 ACFT ID Aircraft Identifier
 ACG ATS System Concept Working Group
 ACG Atm/cns Consultation Group
 ACG ATM/CNS Consultation Group / Groupe consultatif ATM/CNS
 ACG Advanced ATS Concept Group
 Page 10
 EUROCONTROL AIRIAL
 Acronym Full form
 ACG Ats Concept working Group
 ACG ATM/CNS Consultancy Group (Groupe consultatif ATM/CNS)
 ACG Austro Control GmbH
 ACH ATC Flight Plan Change (Modification de plan de vol ATC) (IFPS)
 ACI Area of Common Interest (SYSCO)
 ACI Adjacent Channel Interference
 ACI Airports Council International (Conseil international des aéroports)
 ACI-NA Airports Council International - North America
 ACID Aircraft Identification (ICAO)
 ACID IR aircraft identification implementing rule
 ACIG ATM Content Integration Group
 ACISP Airport CDM Information Sharing Platform
 ACJ Advisory Circular Joint
 ACK Acknowledgement message (Message d'accusé de réception)
 ACL Altimeter Check Location
 ACL ATC Clearances
 ACL Airport Coordination Limited
 ACL ATM Capability Levels
 ACL Aeronautical Clearances Service
 ACL Atc CLearances & instructions
 ACL Access Control Lists
 ACLA Harmonisation of Airspace Classification in the Lower Airspace
 ACLR Access Control Logging & Reporting
 ACM ATC Communications Management
 ACM Asset Change Management
 ACM Acceptance of (Radar) Coordination Message
 ACM Airspace Control Measures
 ACM ATC Microphone Check
 ACM Advanced Configuration Management
 ACM Airborne Conflict Management
 ACM Airspace Configuration Management (N-FDPS)
 ACMET Airport Capacity Meteo
 ACMI Aircraft, Crew, Maintenance and Insurance
 ACMI Air Combat Manoeuvring and Instrumentation
 Page 11
 EUROCONTROL AIRIAL
 Acronym Full form
 ACMS Aircraft Condition Monitoring System
 ACN Aircraft Classification Number
 ACN Austrian Communication Network
 ACN Airspace Coordination Notification
 ACNS Airborne Communications, Navigation and Surveillance
 ACNUSA Autorité de Contrôle des Nuisances Sonores Aéroportuaires (FR)
 ACO Airspace Coordination Order
 ACOC Agence Civile OTAN du Temps de Guerre (FR)
 ACOD Area Conflict Detection
 ACP Aircraft Control Position (window)
 ACP Allied Communications Publication
 ACP Area Control Procedural
 ACP ASAS Crossing Procedure
 ACP Azimuth Change/Count Pulses
 ACP Accept Message (OLDI)
 ACP Azimuth Count Pulse
 ACP African, Caribbean and Pacific States
 ACP ACcePt(ance) (message type designator)
 ACP Airspace Control Plan
 ACP Abri Contrôle de Piste (FR)
 ACP Accept decision (CRCO claims)
 ACP ARTAS Change Proposal
 ACP Aeronautical Communications Panel (ICAO)
 ACP Airspace Crossing Acceptance Message
 ACPO Aircraft Position Operator
 ACPRF All-Call Period Repetition Frequncy
 ACPSC Advisory Committee on Procurement and Sales Contracts (Commission consultative des marchés d'achat et
 de vente (CCMAV))
 ACPT ACcePT(ed)
 ACR Airfield Control Radar
 ACR Atlantic Coordinated Route
 ACROPOLE Amélioration de la coordination et de la régularité par l'optimisation des procédures opérationnelles et de
 l'assistance électronique
 ACS Area Control Surveillance
 ACS Airspace Control System
 Page 12
 EUROCONTROL AIRIAL
 Acronym Full form
 ACS Aircraft Call Sign
 ACS ATFM Contingency Services (Services ATFM d'urgence)
 ACs Analysis Classes
 ACS Advanced Cockpit Simulator
 ACS Advanced Communication System (EEC)
 ACS ATM Concept and Studies (Concept et études ATM)
 ACSA Allied Communications Security Agency
 ACSE Application Control Service Element
 ACSE Association Control Service Element
 ACSP Air Communication Service Provider
 ACT ACTive
 ACT Activation message (Message d'activation) OLDI
 ACTARR Activation Message for an Arrival
 ACTCO Attention CPS Text Communication Object
 ACTF Aeronautical Charting Task Force (Équipe spéciale sur la cartographie aéronautique)
 ACTOUT ACTivation message OUT
 ACU Automatic Calling Unit
 ACU Airspace / Antenna Control Unit. See BSU
 ACW AntiClockWise
 ACWP Actual Cost of Work Performed
 ACZT Actual Commencement of De-icing Time
 AD Administrative Domain (ENOC)
 AD Air Defence
 AD Anno Domini
 AD Aerodrome
 AD Architectural Design
 AD Airspace Design
 AD Airworthiness Directive
 AD Airside Directive
 AD Add/Delete (flag)
 AD Airspace Data Ops Team (Équipe « Exploitation des données d'espace aérien »)
 AD-SPG Ad hoc Aeronautical Spectrum Protection Group
 AD/R Architectural Design Review
 ADA ADvisory Area
 Page 13
 EUROCONTROL AIRIAL
 Acronym Full form
 Ada Name of a high-order computer programming language (not an acronym)
 ADAA Automatic Data Access Arrangement
 ADaaS ATM Data as a Service
 ADAC Aeronautical Data and Charting
 ADAGES Action Plan Definition on the Basis of Architecture studies from GAAS for EATMS / Définition d'un plan
 d'action pour l'EATMS sur la base des études d'architecture du projet GAAS
 ADAM Air Defence and Airspace Management Directorate (NATO)
 ADAMS Aeronautical Data and Message Switching System
 ADAP Automated Downlink of Airborne Parameters
 ADAPT ATS Data Acquisition, Processing and Transfer Panel (ICAO)
 ADAS Advanced Datalink and Airborne Surveillance
 ADB Administrative Bureau
 ADB Airports Database
 ADB/DB Aeronautical Database
 ADC Aerodrome Control(ler)
 ADC Advanced Designs Corporation (weather radar manufacturer - USA)
 ADC Aeronautical Digital Communications Group
 ADC Air Defence Centre / Command
 ADC Air Data Computer
 ADC Analog to Digital Converter
 ADCA Air Defence Classification Area
 ADCCP Advanced Data Communications Control Procedure
 ADCE Airborne Data Circuit-Terminating Equipment
 ADCE Aircraft Data Circuit-Terminating Equipment
 ADCO Arrival Departure Coordinator
 ADCP Air Defence Command Post
 ADD Acceptable Deferred Defect
 ADD Aircraft Derived Data
 ADD Air-Derived Data
 ADD Architectural Design Document (EATMS)
 ADD Average Delay per Delayed Flight
 ADD Aircraft Downlinked Data
 ADD; ADDF Average delay per delayed flight (Retard moyen par vol retardé)
 ADDCS Analog and Discrete Data Converter System
 Page 14
 EUROCONTROL AIRIAL
 Acronym Full form
 ADDI Automated Digital Data Interchange (ICAO)
 ADDN ADDitioN(al)
 ADDR Address
 ADE Expatriation allowance (Allocation de dépaysement)
 ADE Air Defence Element
 ADE Autonomous Display Equipment
 ADEG ATS Data Exchange Group
 ADEP Aerodrome of Departure
 ADES Aerodrome of Destination
 ADEXA Air Defence EXercise Area
 ADEXP ATS Data Exchange Presentation (Présentation de l'échange de données ATS)
 ADF Automatic direction finder (Radiogoniomètre automatique)
 ADF Adjusted Delay Factor
 ADF Application Development Facility
 ADFL Augmented Dynamic Flight Leg
 ADGE Air Defence Ground Environment
 ADHDF Average delay per highly delayed flight (Retard moyen par vol fortement retardé)
 ADI Aerodrome Control Instrument
 ADI Aeronautical Data Integrity
 ADI Attitude Display Indicator
 ADID (LAN) ADapter IDentification
 ADID Aerodrome Identification
 ADIDS Aeronautical Digital Information Display System
 ADIDS Advanced Data & Image Distribution System (CCTV application)
 ADIRS Air Data Inertial Reference System
 ADIRU Air Data Inertial Reference Unit
 ADIS Automated Data Interchange Systems
 ADIS Arrival and Departure Information System
 ADIS (P) Automated Data Interchange System (Panel) - ICAO
 ADIZ Air Defence Identification Zone
 ADJ ADJacent
 ADKAR Abgesetzte Darstellung von KARLDAP Radardaten (DE)
 ADL Architecture Description Language
 ADLP Airborne Data Link Processor
 Page 15
 EUROCONTROL AIRIAL
 Acronym Full form
 ADM Air Data Module
 ADM Airborne Data Bus
 ADM Administration Identifier
 ADM ADMinistration (system or bureau)
 ADM Average Delay per Movement
 ADM Administrative / Administration
 ADM ATFM Delay per Movement (Retard ATFM par mouvement)
 ADM1 muac ADMar console 1
 ADM2 muac ADMar console 2
 ADMA Average Delay per Movement on Arrival
 ADMAR Abgesetzte Darstellung von MADAP Radar- und Flugplandaten (DE) / Remote display of MADAP radar data /
 Affichage déporté des données radar du MADAP
 ADMD Administration Management Domain
 ADMD Airspace Data Management & Distribution
 ADMD Average Delay per Movement on Departure
 ADMIT Administrative Information Technology
 ADMIT Administrative IT (Steering Committee = Comité directeur pour l'informatique de gestion)
 ADMSG Aeronautical Data Modelling Study Group
 ADNC Air Defence Notification Centre (GR)
 ADNET Administrative Network (Switzerland)
 ADNS Aeronautical Radio Incorporated Data Network Service
 ADO Airspace Data Operations
 ADO Architectural Design Overview
 ADOC Air Defence Operations Centre
 ADOLT Air Defence Liaison Team
 ADOP adoption of a child (adoption d'un enfant) (CHRONOTIME)
 ADORA Analysis and Definition of the Operational Requirements for ATM
 ADOS Airspace Data Operations Support (former FDOD/ADS Section, after reorganisation renamed DSU)
 ADOT Airspace Data Operations Team (former FDOD/ADS/SOS, after reorganisation renamed ADOU
 ADOU Airspace Data Operations Unit
 ADP Automatic Data Processing
 ADP Activity Predictor Display
 ADP Auxiliary Data Processing
 ADP ATFCM Daily Plan
 Page 16
 EUROCONTROL AIRIAL
 Acronym Full form
 ADP Aéroports de Paris (FR)
 ADP AIS Data Process
 ADP ATFM Delay Plan (Plan des retards ATFM)
 ADP/APRN Aéroports de Paris/Direction de l'aménagement et des programmes/Unité prestations navigation aérienne
 ADPCM Adaptive Differential Pulse Code Modulation
 ADPG ATM Data Processing Sub-Group
 ADPS Aeronautical Data Processing Systems
 ADPSG ATM Procedures Development Sub-Group
 ADQ Aeronautical Data Quality
 ADQ IR Aeronautical Data Quality and Information Implementing Rule / Implementing Rule on Aeronautical Data and
 Information Quality
 ADR Average Delay per Regulated Flight
 ADR Airspace Data Repository
 ADR Air Data Reference
 ADR Altitude Deviation Report
 ADR Advisory Route
 ADR Airfield Damage Repair
 ADR Architectural Design Review
 ADREP Accident Data Reporting
 ADRS Air Defence Radar Site (or Station)
 ADRU Air Defence Radar Unit
 ADS Audio Distribution System
 ADS Astrophysics Data System
 ADS Automatic Dependent Surveillance (surveillance dépendante automatique)
 ADS Air Data System
 ADS PSG ADS Programme Steering Group
 ADS-A Automatic Dependent Surveillance-Addressed
 ADS-B Automatic Dependent Surveillance-Broadcast (surveillance dépendante automatique en mode diffusion)
 ADS-B ADD ADS-B Aircraft Derived Data
 ADS-B-APT ADS-B Airport
 ADS-B-NRA ADS-B in non-Radar Area
 ADS-B-RAD ADS-B surveillance in radar airspace
 ADS-C Automatic Dependent Surveillance - Contract
 ADS-ICG ADS Internal Coordination Group
 Page 17
 EUROCONTROL AIRIAL
 Acronym Full form
 ADS-P Automatic Dependent Surveillance-Panel (ICAO)
 ADS-PMB ADS Programme Management Board
 ADS-R Automatic Dependent Surveillance-Report
 ADS-SG CHIEF Airspace Design Subgroup (Sous-groupe "Conception de l'espace aérien CHIEF")
 ADSE ADS Equipment
 ADSEL ADdress SELective (Secondary Radar forerunner of Mode-S, UK)
 ADSEL Address Selective SSR System (UK)
 ADSF Automatic Dependent Surveillance Function
 ADSG ATC and DP Strategy Sub-Group
 ADSIA Allied Data Systems Interoperability Agency
 ADSP ATM Data Service Provider
 ADSP Automatic Dependent Surveillance Panel
 ADSP ADS Processor
 ADSS Airspace Data and Support Section
 ADSS ADS and data link surveillance (ADS et surveillance par liaison de données)
 ADSU ADS Unit
 ADT Approved Departure Time
 ADTI Additional Technical Information (ODS - ESCO)
 ADU ADapter Unit
 ADUG Airport Database User Group
 ADV Aerodrome Control Visual
 ADVON Advanced Echelon
 ADVUE Advanced User Equipment (GPS)
 ADZ Synonymous with ADIZ
 ADZ Advise
 ADZY Advisory (US)
 AE Authorisation d'engagement
 AE Application Entity
 AE Antenna
 AE ATM Engineering
 AE Automatic Evaluation (SASS-C)
 AEA Association of European Airlines
 AECG ACAS Evaluation and Coordination Group (EATCHIP)
 Page 18
 EUROCONTROL AIRIAL
 Acronym Full form
 AECMA Association Européenne des Constructeurs de Matériel Aéronautique - European Association of Aerospace
 Equipment Manufacturers
 AECP Aeronautical European Common Proposal
 AED Airspace Environmental Data
 AED Agence européenne de défense (European Defence Agency - EDA)
 AED Agence européenne de défense (European Defence Agency - EDA)
 AED Agence européenne de défense (European Defence Agency - EDA)
 AEE Agence européenne pour l'environnement (European Environment Agency - EEA)
 AEEC Airlines Electronic Engineering Committee
 AEF Alternating Electric Field
 AEFMP Algeria, Spain, France, Morocco, Portugal Project
 AEG-TFK AEG-Telefunken
 AEGIS ATM European Group for the Improvement of (ATC) Scenarios (Groupe européen chargé de l'amélioration
 des scénarios (ATC) dans le domaine de l'ATM)
 AEGIS Advanced EUROCONTROL Guidelines for Implementing SES
 AEGIS Airborne Early Warning Ground Environment Integrated Segment
 AEM Advanced Emission Model
 AEM Airports and Environment Management (Gestion des aéroports et de l'environnement)
 AEM BD Airports & Environment Management Business Division (EUROCONTROL - DAS Business Directorate)
 AeMC Aeromedical Centre
 AEN Dependent child allowance (Allocation pour enfant à charge)
 AENA Aeropuertos Españoles y Navegación Aérea (ES) / Spanish Airport and Air navigation Administration
 AEP Architecture Evolution Plan
 AEP ATFCM Evolution Plan
 AERA Automated En-Route ATCAF
 AERA Automated En-Route Air Traffic Control
 AEREA Association of European Research Establishments in Aeronautics
 AERO I/H+ Satellite Data 2, 3 services
 AeroMACS Aeronautical Mobile Airport Communications System
 AERONET II Aero Thematic Network
 AEROSIM AEROdrome SIMulator
 AES Automatic Enhanced Surveillance
 AES ATC Engineering Section
 AES Aircraft / Airborne Earth Station (ICAO - ADS)
 AESA Agencia Estatal de Seguridad Aérea (Spanish Aviation Safety Agency)
 Page 19
 EUROCONTROL AIRIAL
 Acronym Full form
 AESA Agence européenne de la sécurité aérienne (European Union Aviation Safety Agency - EASA)
 AESS Aeronautical European Spectrum Strategy
 AET Association for European Transport - Association Européenne du Transport
 AEU Antenna Electronic Unit
 AEV Annual Equivalent Value
 AEW Airborne Early Warning
 AEWPD Adapted EATMP Work Programme Document
 AEX Foreign residence allowance (Allocation d'expatriation)
 AF Adjustment Factor
 AF Audio Frequency (VCS)
 AF Analysis filter
 AF ATM Functionality
 AF Assured Forwarding
 AF Air Force
 AF DME Arc to a Fix (ARINC 424 Path Terminator)
 AFAS Aircraft in the Future ATM System (Aéronefs dans le futur système ATM)
 AFAST Active Final Approach Spacing Tool
 AFB Air Force Base (US)
 AFC Airport Facilities Control (ICAO)
 AFC Area Forecast Centre
 AFC ATC Frequency Change (service)
 AFC Automatic Frequency Control
 AFCAC African Civil Aviation Commission (Commission Africaine de l'Aviation Civile, CAFAC)
 AFCENT Allied Forces CENTral europe HQ
 AFCNF Air Force Central NOTAM Facility (US)
 AFCS Automatic Flight Control System
 AFD Associated Flight Details
 AFDAS Approach Funnel Deviation Alert System
 AFDS Autopilot Flight Director System
 AFDX Avionics Full Duplex switched ethernet
 AFFSC (E) Air Forces Flight Safety Committee (Europe)
 AFG AFterGlow (SDD image)
 AFG Advisory Financial Group (ex-FCG/EUROCONTROL) / Groupe Financier de consultation
 AFG-TF Advisory Financial Group - Task Force on the Audit and Control Boards
 Page 20
 EUROCONTROL AIRIAL
 Acronym Full form
 AFI Authority and Format Identifier
 AFI Africa / Indian Ocean (ICAO Region)
 AFI ICAO region AFrica + India
 AFIL Air-Filed Flight Plan
 AFIS Aeronautical Feature Information Service
 AFIS Aerodrome Flight Information Service
 AFISO Aerodrome Flight information Service Officer
 AFL Actual Flight Level
 AFL Assigned Flight Level
 AFM Aircraft Flight Manual
 AFM Automatic Font Management
 AFM Autonomous Flight Management
 AFM AFfirMative, Yes, That is Correct
 AFMS Advanced Flight Management System
 AFMSG Audit and Financial Matters Sub-Group
 AFMU Airspace and Flow Management Unit
 AFN ATS Facilities Notification
 AFN Airspace, Flow management and Navigation
 AFN BD Airspace/Flow Management & Navigation Business Division (Division prestataire "Espace aérien / gestion des
 courants de trafic aérien et navigation")
 AFNOR Association Française de Normalisation (FR)
 AFO Household allowance (Allocation de foyer)
 AFOS Automation of Field Operations and Services
 AFP Airborne Flight Plan message
 AFP Abbreviated Flight Plan (NATCON system at Avinor)
 AFP Air Traffic Control Flight Plan Proposal
 AFP Active Flight Plan Processing
 AFPA Automated Flight Plan to Track Association
 AFPC Automatic Frequency / Phase Control
 AFPL ADEXP Format Individual Flight Plan Message -
 AFR Autonomous Flight Rules
 AFR6380 Air France flight 6380
 AFS Advanced Functional Simulator
 AFS Aeronautical Fixed Service
 Page 21
 EUROCONTROL AIRIAL
 Acronym Full form
 AFSATCOM Airborne Satellite Communication
 AFSBW Amt für Flugsicherung der Bundeswehr (DE)
 AFSCN Air Force Satellite Control Network
 AFSG Aeronautical Fixed Services Group (ICAO)
 AFSS Automated Flight Service Station
 AFT Average Flight Time
 aft AFTer ... Time or Place
 AFTK Available Freight Tonne Kilometre (cargo)
 AFTN Aeronautical Fixed Telecommunication Network (Réseau du service fixe des télécommunications
 aéronautiques)
 AFUA Advanced Flexible Use of Airspace
 AFUAS Advanced Flexible Use of Airspace Support Service
 AFUU Association Française des Utilisateurs d'Unix (FR)
 AFW Area Flows Window
 AG Address Ground DTE
 AGA Aerodromes, Air Routes and Ground Aids
 AGADE Automated Air/Ground Data Interchange
 AGARD Advisory Group on Aeronautical Research and Developments (NATO)
 AGAS (High-Level) Action Group for ATM Safety (Groupe d'action européen de haut niveau pour la sécurité de
 l'ATM)
 AGAS ICG AGAS Implementation Coordination Group
 AGAS IRWG AGAS Implementation of Regulations Working Group
 AGAT Advisory Group for ATM Training (Groupe consultatif pour la formation ATM)
 AGATE A-SMGCS Ground Control Assistance Tools for Europe
 AGC Air Ground Cooperative ATS Programme
 AGC Air/Ground Cooperative ATS Concept
 AGC Air-Ground Communications
 AGC Ad hoc Group of Commissioners (SRC)
 AGC Automatic Gain Control (VCS)
 AGC Automatic Gain Control
 AGC SRC Ad Hoc Group of Commissioners (Groupe ad hoc des commissaires de la SRC)
 AGC Air-Ground Cooperative Air Traffic Services (Services de la circulation aérienne en coopération air-sol)
 AGCFG Air-Ground Communications Focus Group (Groupe de réflexion sur les communications air-sol)
 AGCS Air-Ground Communication System
 AGCSG Air/Ground Communication Sub-Group Meeting
 Page 22
 EUROCONTROL AIRIAL
 Acronym Full form
 AGDC Air/Ground Data Communications
 AGDC-SG Air/Ground Data Communications Sub Group. See AGSG
 AGDC-TF Air/Ground Data Communications-TF (ODT)
 AGDL Air-Ground Data Link (Liaison de données air-sol)
 AGDLGMS Air Ground Data Link Ground Management System
 AGDLGMS A/G Datalink Ground Management System
 AGDLS Air-Ground Data Link System
 AGE Agency Group for Excellence (Groupe «Excellence» de l'Agence)
 AGHT Actual Ground Handling start Time
 AGIFORS Airline Group of the International Federation of Operational Research Societies
 AGINF Air-Ground Infrastructure
 AGL Airfield Ground Lighting
 AGL Above Ground Level
 AGLAE Air-Ground Data Link Applications Experimentation (FR)
 AGM Administrative and Guidance Material
 AGN Agenda
 AGN AGaiN
 AGNA Advisory Group National Authorities
 AGOD Advisory Group on Deliverables
 AGR Agreement
 AGR Air/Ground Router
 AGR Agency Advisory Group on Research (Groupe consultatif pour la recherche)
 AGS Aeronautical Gateway System
 AGSG Air / Ground Data Communication Sub group
 AGSVC Air-Ground Services
 AGVC Air/Ground Voice Communication
 AGVC-SG Air/Ground Voice Communication Sub Group
 AGVCS Air Ground Voice Channel Spacing
 AGVN ATS Ground Voice Network
 AGY EUROCONTROL Agency
 AGY Agency
 AH Artificial Horizon
 AH Application Header
 AHD Advanced Help Desk
 Page 23
 EUROCONTROL AIRIAL
 Acronym Full form
 AHDG Assigned Heading
 AHEAD Automation and Harmonisation of European Aeronautical Data (Automatisation et harmonisation des données
 aéronautiques européennes)
 AHGSO Ad Hoc Group of Senior Officials (Groupe ad hoc de hauts fonctionnaires)
 AHMI Airborne Human-Machine Interface (Interface homme-machine embarquée)
 AHU Air Handling Unit
 AI Attitude Indicator
 AI Artificial Intelligence (intelligence artificielle - IA)
 AI Aeronautical Information
 AIA Aerospace Industries of America
 AIAA American Institute of Aeronautics and Astronautics
 AIAE International Association of the Former Officials of EUROCONTROL (Association internationale des anciens
 d'EUROCONTROL)
 AIB Aeronautical Information Bulletin (EAD)
 AIB Aeronautical Information Bureau
 AIBN Accident Investigation Board Norway (Statens havarikommisjon for transport, SHT)
 AIBT Actual In-Block Time
 AIC Aeronautical Information Circular (Circulaire d'information aéronautique)
 AICB Air Initiated Comm-B (Protocol)
 AICG ACAS Implementation Coordination Group (Groupe de coordination de la mise en oeuvre de l'ACAS)
 AICG Airport Interface Coordination Group
 AICG Ab Initio Coordination Group
 AICM Aeronautical Information Conceptual Model (Modèle conceptuel d'informations aéronautiques)
 AID Aid or Aircraft Identification
 AIDA Aeronautical Information and Data handling Austria
 AIDA Airport Surface Operations and Integration of Data with ATC
 AIDB Airport Information Databases
 AIDC ATS Interfacility Data Communications (ICAO)
 AIDU Aeronautical Information Document Unit
 AIDX Aviation Information Data Exchange
 AIG Automatic Input Generation
 AIG Accident Investigation [and Prevention]
 AIG ACAS Implementation Group (Groupe de mise en oeuvre de l'ACAS)
 AIGD ADS-B Implementation and Operational Guidance Document
 AIHWG Aeronautical Information Harmonization Working Group
 Page 24
 EUROCONTROL AIRIAL
 Acronym Full form
 AIIRE Atlantic Interoperability Initiative to Reduce Emissions
 AIL Aeronautical Item Location Bank (ODS)
 AIM Aeronautical Information Management (Gestion de l'information aéronautique)
 AIM Air Traffic Flow Management Information Message
 AIM Accident Incident Model
 AIM AFTN message type
 AIM ATFM Information Message (IFPS)
 AIM-B Aeronautical Information Management - The Big Picture (course title)
 AIM-FANS Airbus Interoperable Modular FANS
 AIM-I Aeronautical Information Management - The Inside (course title)
 AIMA Airport Impact Model Assessment
 AIMAS Académie internationale de médecine aéronautique et spatiale (International Academy of Aviation and Space
 Medicine - IAASM)
 AIMS Aircraft Integrated Monitoring (Information Management) System
 AIMSL AIM Service Layer
 AINSC Aeronautical INdustry Service Communication
 AIP Administrative Incentive Pricing
 AIP Aeronautical Information Publication (publication d'information aéronautique)
 AIPE Association Internationale du Personnel d'EUROCONTROL (International Association of EUROCONTROL
 staff)
 AIPN Appointing authority / Autorité investie du pouvoir de nomination
 AIPSG Aircraft Identification Programme Steering Group
 AIR Armament Initiative and Requirements
 AIR Air Control
 AIR AIRworthiness
 AIR 4653 Aerospace Information Report 4653 (Flight Management Systems Review)
 Air-TN Air Transport Net
 AIRAC Aeronautical Information Regulation and Control (Régularisation et contrôle de la diffusion des
 renseignements aéronautiques)
 AIRCO AIR COnditioning
 AIRCOM Aircraft Communications
 AIRE Atlantic Interoperability Initiative to Reduce Emissions
 AIRE Airlines International Representation in Europe
 AIREP AIrborne position REPort
 AIREP Air-Report (ICAO)
 Page 25
 EUROCONTROL AIRIAL
 Acronym Full form
 AIRI SG Aeronautical Information Regulations Implementation Sub-group
 AIRIAL Air Navigation Inter-site Acronym List
 AIRM ATM Information Reference Model
 AIRMET Air Meteorological Information Report
 AIRP Airworthiness Panel (ICAO)
 AIRPROX Aircraft Proximity
 AIRS Airport Information Report Service
 AIRSAW Airborne Situation Awareness
 AIS Abbreviated Injury Scale
 AIS Aeronautical Information Services (Services d'information aéronautique) ICAO
 AIS AHEAD Aeronautical Information Services (AIS) Automation and Harmonisation of European Aeronautical Data
 (AHEAD) Programme (Programme d'automatisation et d'harmonisation des données aéronautiques
 européennes pour les Services d'information aéronautique)
 AIS-AIMSG AIS-AIM Study Group (Aeronautical Information Services-Aeronautical Information Management Study Group
 )
 AIS-TF AIS Training Task Force
 AISAP AIS Automation Panel
 AISAS Aeronautical Information Services Automated System
 AISC Aeronautical Mobile Communications System Panel
 AISC Aeronautical Industry Service Communication
 AISG AIS Automation Working Group (ICAO)
 AISOPS AIS Operations
 AISP Aeronautical Information Service Provider
 AISPOP AIS Planning and Operations Subgroup
 AISS Aeronautical Information Server System (ODS)
 AIST AIS Team
 AIST; AIS Team Aeronautical Information Service Team (Groupe "Services d'information aéronautique")
 AISTEC AIS Technical Sub-Group
 AISTF Agency IT Strategy Task Force (Équipe spéciale « Stratégie TI de l'Agence »)
 AISU Aeronautical Information Services Unit
 AIT Aircraft Identification Tag
 AITF ANSB Institutional Task Force / Équipe spéciale de l'ANSB sur les questions institutionnelles
 AITSC Administrative IT Steering Committee
 AIU Aviation Intelligence Unit
 AIW Area Infringement Warning
 Page 26
 EUROCONTROL AIRIAL
 Acronym Full form
 AIX IBM Unix
 AIXLINK IBM Unix Link
 AIXM Aeronautical Information Exchange Model (Modèle d'échange des informations aéronautiques)
 AJM sickness adjustment (congé converti en maladie) (CHRONOTIME)
 AK data AcKnowledge
 AK8 Amplitude Key Shift
 aka Also Known As
 AKARD Available Knowledge And required system Research and Development
 AL Alerting Service
 AL Albania
 AL Aircraft Label
 AL Assurance Level
 ALA ALighting Area
 ALAQS Airport Local Air Quality Studies
 ALAR approach and landing accident reduction
 ALARP As Low As Reasonably Practicable
 ALB Alternative Label
 ALB [1] Alternative track LaBel 1, (G/S, climb, descent)
 ALB [2] Alternative LaBel 2 (SSR Code)
 ALC Automatic Level Control
 ALCC Airlift Central Coordination Centre
 ALCE Airlift Control Element
 ALCM Air Launched Cruise Missile
 ALD Airlift Division
 ALD Automated Logic Diagram
 ALDA Agency Library Documentation and Archives (Service des bibliothèques, de la documentation et des archives
 de l'Agence)
 ALDT Actual Landing Time
 ALENA Accord de libre-échange pour l'Amérique du Nord / North American Free Trade Agreement (=NAFTA)
 ALERFA Alert Phase
 Alert Alert Phase
 ALFA ACI Association des Aéroports de Langue Française Associés à l'Airports Council International
 ALGOL ALGOrithmic Language
 ALI (States) 4 (Maastricht) States - Amendment of Legal Instruments Working Group
 Page 27
 EUROCONTROL AIRIAL
 Acronym Full form
 ALIM Ats Line Interface & Monitoring
 ALIM Altitude Limit (Positive RA Altitude Threshold)
 ALLA nursing (allaitement) (CHRONOTIME)
 ALLA Atn Lower Layer Acces processor
 ALLA Allied Long Lines Agency
 ALLPIRG All Planning and Implementation Regional Group ((Réunion de) tous les Groupes régionaux de planification et
 de mise en oeuvre)
 ALM Application Lifecycle Management
 ALMC Airlift Movement Cell
 ALO Air Force Liaison Officer
 ALPA Air Line Pilots Association
 ALR ALeRting (message type designator)
 ALR ALeRt: displays 4 hatched symbols in line 3 of label for STCA
 ALRC Altitude Reconstruction
 ALRS Alerting Service
 ALRT ALERT (STCA)
 ALRTF ATCO Licensing Review Task Force
 ALS Approach Lighting System
 ALS Architecture Layer Structure (ISO)
 ALS Automatizovany Letisni System (CZ) / Automated Airport System
 ALS Automatic Line Switch (RMCDE)
 ALS Airborne Laser Scanning
 ALT Altitude
 ALT Airborne Link Terminal
 ALT Alanine Transaminase (GOT)
 Alt ALTernating, (relating to marine lights)
 ALTN ALTerNate (Aerodrome)
 ALTRV Altitude Reservation System
 ALU Arithmetic Logic Unit
 ALUG ATCO Licencing User Group
 ALUG AudioLAN Users Group
 AM Armenia
 AM Amplitude Modulation
 AM Arrival Manager (Gestionnaire des arrivées)
 Page 28
 EUROCONTROL AIRIAL
 Acronym Full form
 AM Attribute Modification
 AM Arrival Manager
 AM Address Mobile dte
 AM Airspace Management
 AM Analysis Model
 AM-MSK Amplitude Modulated Minimum Shift Keying
 AM-SSB Single Side Band Amplitude Modulation
 AM-VHF Amplitude Modulation Very High Frequency
 AMA Arrival Management Message
 AMA Airlift Management Agency
 AMA agreement medical advisor (accord conseil médical) (CHRONOTIME)
 AMA AMC Manageable Area
 AMA Area Minimum Altitude
 AMACS All-purpose Multi-carrierl Aviation Communication System
 AMAN Arrival Manager (APATSI)
 AMAN Advanced Arrival and Management Support
 AMASS Airport Area Movement Safety System
 AMBE Advanced Multi-Band Excitation
 AMC ATC Microphone Check (service)
 AMC Airspace Management Cell (Cellule de gestion de l'espace aérien)
 AMC ATS Messaging Management Centre (AMC)
 AMC Acceptable Means of Compliance
 AMC Area of Mandatory Carriage
 AMC Aeromedical Centre
 AMC Airspace Military Cell
 AMC/CADF Airspace Management Cell - ECAC Centralised Airspace Data Function
 AMC/GM Acceptable Means of Compliance and Guidance Material
 AMCP Aeronautical Mobile Communication Panel (ICAO)
 AMCs Acceptable Means of Compliance
 AMD Aerodrome mapping data
 AMD Administrative Management Domain
 AMD AMenD(ed) (meteo message)
 AMD Arrival manager Display
 AMDAR (Global) Aircraft Meteorological Data Relay
 Page 29
 EUROCONTROL AIRIAL
 Acronym Full form
 AMDB Aerodrome Mapping Database
 AMDP Airspace Management Data Processing
 AMDP-TF EATCHIP Airspace Management Data Processing Task Force
 AMDT Amendment (ICAO)
 AMDWP Aeromedical Working Party
 AME Authorised Medical Examiner
 AME ATFM Message Exchange (System)
 AME Aero-medical Examiner (examinateur aéromédical)
 AMEG Air Miss Evaluation Group (D)
 AMHS ATS Message Handling System
 AMI Alternate Mark Inversion
 AMI Airspace Management Information
 AMI Administrative and Management Information Software
 AMID Approach Multi-Input Device (ODID)
 AMIS Aerodrome Mapping Information Service
 AMJ Advisory Material Joint
 AML (WP) Airfield Markings and Lighting (Working Party)
 AMM Aircraft Maintenance Manual
 AMMON AIS Data and Publication Measuring and Monitoring
 AMN Airspace Management and Navigation (EATMP Unit)
 AMO Assignment Message OAT
 AMOC ATFM Air Traffic Flow Management
 AMOC ATFM Modelling Capability
 AMOD ATC Modification of FPL
 AMOFSG Aerodrome Meteorological Observation and Forecast Study Group (ICAO)
 AMON Airport (slot) Monitoring
 AMOS Automatic Meteorological Observing System
 AMOS ARTAS Maintenance and Operational Support (Appui à l'exploitation et à la maintenance de l'ARTAS)
 AMP Airborne Monitoring Project
 AMP Airspace Management Plan system (Belgium)
 AMP Amplifier
 AMP Airborne Monitoring Project
 AMP Application Maintenance Provider
 AMPII Airspace Management Plan 2
 Page 30
 EUROCONTROL AIRIAL
 Acronym Full form
 AMPLE ATM Master Plan for Europe
 AMPS Advanced Mobile Phone Service
 AMPS American Mobile Phone System
 AMQP Advanced Message Queuing Protocol
 AMR TF ATCO Medical Requirements Task Force
 AMRS Aeronautical Mobile (Route) Service
 AMRSG ATCO Medical Requirements Study Group (UK)
 AMRTF ATCO Medical Requirements Task Force
 AMRUFRA Amsterdam-Ruhr-Frankfurt
 AMS Arrival Management System
 AMS Airborne Mission System
 AMS ATC Model-Simulations Studies
 AMS AMSterdam sector
 AMS Alenia Macroni Systems
 AMS Airspace Management Service
 AMS Aeronautical Mobile Service (8.33 User Guide)
 AMS(R)S Aeronautical Mobile Satellite (Route) Service
 AMSC American Mobile Satellite Consortium
 AMSC Allied Military Security Code
 AMSL Above Mean Sea Level
 AMSS Aeronautical Mobile Satellite System
 AMSS Aeronautical Mobile Satellite Service
 AMSS Automatic Message Switching System
 AMSSP Aeronautical Mobile Satellite Service Panel
 AMT ADS Mediterranean Trials
 AMTI Adaptive Moving Target Indicator
 AMU Audio Management Unit
 AMWG Airspace Management Working Group
 AMXM Aerodrome Mapping Exchange Model
 AMXS Aerodrome Mapping Exchange Schema
 AN Adjacent Not tracked
 AN Access Node (RMCDE)
 AN1 Access Node 1 (old name, see ANg1)
 AN2 Access Node 2
 Page 31
 EUROCONTROL AIRIAL
 Acronym Full form
 AN3 Access Node 3
 ANA Birth grant/birth allowance (Allocation de naissance)
 ANA Administration de la Navigation Aérienne
 ANA ANA - Aeroportos de Portugal S.A. (Portugal)
 ANAM Aeroportos e Navegação Aérea da Madeira S.A.
 ANB Air Navigation Bureau (ICAO)
 ANC Air Navigation Commission (ICAO organ)
 ANC Aeronautical Navigation Chart (ICAO)
 ANC Access Network Computer (RADNET)
 ANC air navigation charging
 ANC/12 ICAO Air Navigation Conference 12 (held in Dec 2012)
 ANCAT Abatement of Nuisances Caused by Air Transport (Groupe d'experts de) l'atténuation des nuisances du
 transport aérien) (ECAC environmental policy committee (ENVAL)
 ANCM Airport Network Conceptual Model
 AND Aircraft Nose Down
 ANDB Automated NOTAM Database
 ANDRA Advanced Node for Data Relay in ATN
 ANDS ANS Department
 ANERC Advanced New En-Route Centre (UK)
 ANERS Aviation Noise and Emissions Reduction Symposium
 ANF Additional Network Feature
 ANF-TC Additional Network Feature - Transit Counter
 ANFR Agence nationale des fréquences
 ANg1 AN1 New Generation System
 ANI Airborne Network Interface
 ANI Automatic Number Identification
 ANIM Airport Network Information Management
 ANL Automatic Noise Levelling
 ANM ATFM Notification Message (Message de notification ATFM)
 ANO Air Navigation Order
 ANOMS Airport Noise and Operations Monitoring System
 ANOVA Analysis of Variance
 ANP Aircraft Noise and Performance
 ANP Air Navigation Plan
 Page 32
 EUROCONTROL AIRIAL
 Acronym Full form
 ANP Actual Navigation Performance
 ANPP Air Navigation Plan Publication
 ANS Czech Republic ATC Authority
 ANS ANSwer
 ANS Air Navigation Services
 ANS-CR Air Navigation Services of the Czech Republic
 ANSA International Advisory Group Air Navigation Services
 ANSB Air Navigation Services Board (Conseil des services de navigation aérienne)
 ANSB BPTF Air Navigation Services Board Business Planning Task Force
 ANSEP Air Navigation Services Economics Panel (ICAO) / Groupe d'experts sur l'économie des services de
 navigation aérienne
 ANSI American National Standards Institute
 ANSNAC Air Navigation Services National Advisory Committee (Canada)
 ANSO Air Navigation Services Offices (Ireland)
 ANSP Air Navigation Service Provider (prestataire de services de navigation aérienne)
 ANSV Agenzia Nazionale per la Sicurezza del Volo (Italy)
 ANSW function allowing ANSWering of "wait" key calls
 Ant ANTenna
 ANT Airspace (and) Navigation Team (Groupe "Espace aérien et navigation")
 ANTIOPE Acquisition Numérique et Télévisualisation d'Images Organisées en Pages d'Ecriture
 ANU Air Navigation Unit
 ANU Aircraft Nose Up
 ANVAR Agence Nationale (F) de VAlorisation de la Recherche
 ANXM Airport Network (information) Exchange Model
 AO Airlines Operator
 AO ATM Operations
 AO Aircraft Operator (IFPS)
 AO Arrival Operations
 AO Airport Operator
 AO Airport Operations
 AO Aircraft Operator (Exploitant d'aéronef)
 AO-WIR Aircraft Operator What-If Reroute
 AOA Aircraft Operating Agency (e.g. Airlines)
 AOA ACARS over AVLC
 Page 33
 EUROCONTROL AIRIAL
 Acronym Full form
 AOB Air Order of Battle
 AOB Any Other Business
 AOB Angle of Bank
 AOBT Actual Off-Block Time
 AOC Assumption of Control Message
 AOC Aircraft Operations Centre (EATMS)
 AOC Aeronautical Operational Control
 AOC Assume of Control (ODID)
 AOC Air Operator's Certificate / Certificat de transporteur aérien
 AOC Aircraft Operations Centre (ICAO)
 AOC Airlines Operational Communication
 AOC Aerodrome Obstruction Chart
 AOC Advanced Operational Capability
 AOC Auxiliary Output Chip
 AOC Advance Operational Capability
 AOC Airline Operation Control
 AOC Aircraft Operating Company
 AOC Automatic Overload Control
 AOC airline operational control
 AOC Aeronautical Operational Control
 AOC Advanced Operational Capability (EGNOS)
 AOC Airline Operational Communications
 AOC Airline Operations Centre
 AOC Advice of Charge
 AOC Aircraft Operators Committee
 AOC Aeronautical Operational Communications
 AOCC Aircraft Operator Control centre
 AOCCC Airline Operator Crisis Coordination Cell
 AOCD Airport Operations Concept Document
 AOCI Airport Operators Council International
 AOCP Airborne Operational Computer Programme
 AOCU Aircraft Operator Control Unit
 AOD Any Other Duty
 AODB airport and obstacle database
 Page 34
 EUROCONTROL AIRIAL
 Acronym Full form
 AODF Air Transport Operator Data Flow
 AOE Airport Operations & Environment (Exploitation des aéroports et environnement)
 AOF Aircraft-Oriented Flight Leg (N-FDPS)
 AOF Allocation of Functions
 AOF AIS Office (Bureau AIS) (EAD)
 AOFG; OFG ATM Operational Focus Group; Operational Focus Group
 AoI Area of Interest
 AOI Aircraft Operations Information
 AOI AIS Office
 AOI Area of Operational Interest
 AOIG ACAS Operational Implementation Group
 AOIS Aeronautical Operational Information System
 AoL Area of Responsibility
 AOLC Aircraft Operators Liaison Cell (Cellule de liaison des exploitants d'aéronefs)
 AOLO Aircraft Operators Liaison Officer
 AOLO Aircraft Operator Liaison Officer (FR: Assistant AOLO)
 AOM Aircraft Operations Manual
 AOM Airspace Organisation & Management (Organisation et gestion de l'espace aérien)
 AOP ATM Operations Plan
 AOP Aeronautical OSI Profile
 AOP Autonomous Operations Planner
 AOP Airport operations (Opérations aéroportuaires)
 AOP Airport Operations Unit (EATM)
 AOP Airport Operating Plan
 AOP Airport Operations Programme
 AOPA Aircraft Owners and Pilots Association
 AOPG Aerodrome Operations Group (ICAO) / Groupe sur l'exploitation technique des aérodromes
 AOPTF Aerodrome Operations Task Force
 AOR Atlantic Ocean Region (ICAO)
 AOR Area of Responsibility
 AOR-E Atlantic Ocean Region - East (ICAO)
 AOR-W Atlantic Ocean Region - West (ICAO)
 AORE Atlantic Ocean Region East
 AORO AO RPL Office
 Page 35
 EUROCONTROL AIRIAL
 Acronym Full form
 AORTF ATM Added Functionality Operational Requirements Task Force
 AOS Airport Operations Strategy Drafting Group
 AOS Aircraft Operators
 AOS Astech Office Suite
 AOT Airport Operations Team (Groupe "Exploitation des aéroports")
 AOWIR Aircraft Operator What-If Re-routing / Outil de Simulation des Réacheminements destiné aux exploitants
 d'aéronefs
 AOWP Airport Operations Work Plan
 AP Action Plan
 AP Arrival Procedure (see STAR)
 AP Application Process
 AP AirPort
 AP Address/Parity
 AP Auto-Pilot
 AP Associated Press
 AP/FD Autopilot/flight director
 AP23 Action Plan 23
 APA Airborne Parameter Analysis
 APA All Points Addressable
 APAC ICAO Asia and Pacific (RSO)
 APANPIRG Asia/Pacific Air Navigation Planning and Implementation Regional Group
 APAPI Abbreviated Precision Approach Path Indicator
 APARMO Asia/Pacific Approvals Registry and Monitoring Organization
 APAS Actions de promotion d'accompagnement et de soutien (STAR)
 APATSI Airport / Air Traffic Systems Interface (ECAC) / Interface Services d'Aéroport (one of the EATCHIP task
 forces)
 APB APATSI Project Board (ECAC)
 APC Aeronautical Planning Chart
 APC ATM Policy Committee (Comité "Politique ATM")
 APC Automatic Phase Control
 APC Aeronautical Public Correspondence
 APC Assistant Planning Controller
 APC Approach Control
 APC Airline Passenger Communication
 APC Airborne Public Correspondence
 Page 36
 EUROCONTROL AIRIAL
 Acronym Full form
 APC Airspace Policy Commission (ATFM)
 APCER Portuguese Association for Certification (Association Portugaise de Certification)
 APCH Approach
 APD Activity Predictor Display
 APDCSG; APDSG ATM Procedures Development Sub-Group (Sous-groupe "Mise au point des procédures ATM")
 APDLC Aircraft Proximity Data Link Communication (ICAO)
 APDSG ATM Procedures Development Sub-Group
 APDU Application Protocol Data Unit
 APE Analysis Programme for Evaluation
 APEC Asia Pacific Economic Cooperation
 APERMECA Association pour le Perfectionnement des Méthodes de Contrôle de la Circulation Aérienne
 APF Aerospace Performance Factor
 API Arrival Planning Information
 API Application Programming Interface
 APIRG Africa-Indian Ocean Planning and Implementation Regional Group (ICAO)
 APL Atc flight PLan message (IFPS)
 APL Abbreviated Flight Plan (IFPS)
 APL ATC Flight Plan
 APL Applied Physics Laboratory
 APL A Programming Language
 APM Approach Path Monitor (Dispositif de surveillance de trajectoire d'approche)
 APM Aircraft Personality Module
 APM Architecture Project Management
 APMB ACAS Programme Management Board
 APN Airspace, Network Planning & Navigation (Espace aérien, planification du réseau et navigation)
 APO Office of Aviation Policy and Plans (FAA)
 APO Aircraft Performance and Operations
 APO Airport Operator
 APO; AOP Airport operations (Opérations aéroportuaires)
 APOC Airport Operations Centre
 APOD Airport of Debarkation
 APP Approach Centre / Control
 APP Approach
 APP Approach Control (Office/Service)
 Page 37
 EUROCONTROL AIRIAL
 Acronym Full form
 APP controller/director Approach controller/director
 APP-ASS Approach-Assistant
 App. Appendix
 APPA SG ATFM Policies and Principles Advisory Sub-Group (Sous-groupe consultatif sur les principes et lignes d'action
 en matière d'ATFM)
 APPAG ATFM Policies and Principles Advisory Group
 APPC Advanced Program to Program Communications
 APPC Application Programme to Programme Communication
 APPN Advanced Peer to peer Networking
 APPS Approach Surface
 APR Automatic Position Reporting
 Apr APRil
 APR Airport Operations Programme (Programme d'exploitation des aéroports)
 APR Aircraft Position Report
 APRAG Airport Operations Programme Advisory Group
 APRX APpRoXimate(ly)
 APS Approach Control Surveillance
 APS Aeronautical Publishing System
 APSB ACAS Programme Steering Board (Comité directeur du Programme ACAS)
 APSG ACAS Programme Steering Group
 APSG After Passing
 APSL Airport Slot
 APT Airport Simulation
 APT civil/military AirPorTs
 APT Airport Traffic management (Gestion du trafic aux aéroports)
 APT Airspace Planning Team (EATCHIP) became ANT (March 94)
 APT Airport(s)
 APT Advanced Persistant Threat
 APT AirPorT map
 APT Airport Through-put (Débit des aéroports)
 APT Airport Playback Tool
 APT Alternative Parallel Taxilane
 APT BD Airport Throughput Business Division (EUROCONTROL - DAP Business Directorate)
 APTOCC Airport Operational Control Centre
 Page 38
 EUROCONTROL AIRIAL
 Acronym Full form
 APTS AirPorTS
 APU Auxiliary Power Unit
 APV Approach Procedures with Vertical Guidance
 APV Accuracy Position & Velocity
 APV APproVed(al)
 APW Area Proximity Warning (Avertisseur de proximité de zone protégée)
 AQ Air Quality
 AQAP Allied Quality Assurance Publication
 AQG Agency Quality Group
 AQP Advanced Qualification Programme
 AR Automatic Reminder
 AR Air Route
 AR Approval Required
 AR Agency Representative (CIP)
 AR-1 Approach Radar 1
 AR1 special procedure AReas [1]
 AR2 special procedure AReas [2]
 ARA Apple Remote Access
 ARA Task Force Airspace Security Risk and Threat Assessment Task Force (équipe spéciale « Évaluation des risques et des
 menaces pour la sûreté de l¿espace aérien » - équipe spéciale ARA)
 ARAC Aviation Rulemaking Advisory Committee
 ARAS Anti-Reflection, Anti-Static coating
 ARB Authoritative Representative Body
 ARC Airlift Requirement Centre
 ARC Airport Reference Code
 arc Assigned Rate of Climb / descent
 arc assigned rate of climb/descent
 ARC Airworthiness Review Certificate
 ARC Advanced Research for/in Air Traffic Control
 ARC Attached Resources Computing (concerning ARCnet)
 ARC Automated Radar Control
 ARC (ARCH) Archive System (old name, see DWH)
 ARC 2000 Automatic Radar Control for the 21st Century (CEE)
 ARCA Advanced en-Route Centre for Air Traffic Management
 Page 39
 EUROCONTROL AIRIAL
 Acronym Full form
 ARCC Air Rescue Coordination Centre
 ARCID Aircraft Identification
 ARCOS Arrival Coordination System (D)
 ARCP Air Refuelling Control Point
 ARCP Architecture Prototype
 ARCS Avionics Refrigeration Cooling System
 ARCTYP Aircraft Type
 ARD Architecture, Research and Development (DECMA)
 ARDA Aviation R&D Activities (Activités de recherche-développement dans le domaine aéronautique)
 ARDEP Analysis of Research & Development in European Programmes (Analyse des activités de recherchedéveloppement
 dans les programmes d'EUROCONTROL)
 ARDM Airspace Regulation, Design and Management (Réglementation, organisation et gestion de l'espace aérien)
 ARDRS Automatic Radar Data Recording System
 ARDS ATM architecture and overall system engineering (Architecture et conception générales du système ATM)
 ARDT Actual Ready Time for Movement
 ARES Airspace REServation
 ARETA ATM with RNAV in Extended Terminal Area
 ARFA Allied Radio Frequency Agency
 ARFF Aircraft Rescue and Fire Fighting
 ARFOR ARea FORecast (in aeronautical meteo code)
 ARFS Aerodrome Rescue and Fire-fighting Service
 ARG Aviation Research Group
 ARG Analysis Reference Generator
 ARGOS ATC Real Groundbreaking Operational System
 ARH Architecture
 ARIA Aerodrome Runway Incursion Assessment
 ARIBA ATM system safety criticality Raised Issues in Balancing Actors Responsibility
 ARIM Accounts Receivable Implementation (Project)
 ARINC Aeronautical Radio Incorporated (US)
 ARINC 306 Guidance For Designers Of Aircraft - Electronic Installations
 ARINC 307 Aircraft Integrated Data System Wire Bundle Provisions
 ARINC 404A Air Transport Equipment Cases And Racking
 ARINC 406A Airborne Electronic Equipment
 ARINC 408A Air Transport Indicator Cases And Mounting
 Page 40
 EUROCONTROL AIRIAL
 Acronym Full form
 ARINC 413A Guidance For Aircraft Power Utilisation And Transient Protection
 ARINC 414 General Guidance For Equipment And Installation Engineers
 ARINC 415 Operation/Technical Guidelines On Failure Warning and Functional Test
 ARINC 419 Digital Data System Compendium
 ARINC 421 Guidance For Standard Subdivision of ATA Spec 100 Numbering System for Avionics
 ARINC 422 Guidance For Modification Status Indicators & Avionics Service Bulletins
 ARINC 424 Navigation System Data Base
 ARINC 429 Mark 33 Digital Information Transfer System
 ARINC 528 Airborne Tape Recorder
 ARINC 533A Airborne HF SSB/AM System
 ARINC 541 Airborne Magnetic Flight Data Recorder
 ARINC 542 Airborne Oscillograph Flight Data Recorder
 ARINC 542A Digital Flight Data Recorder
 ARINC 551 Airborne Glide Slope Receiver - Mark 2
 ARINC 557 Airborne Voice Recorder
 ARINC 559A Mark 2 Airborne HF SSB/AM System
 ARINC 561 Air Transport Inertial Navigation System - INS
 ARINC 566 Airborne VHF Communications Transceiver And Mark 1 VHF SATCOM System
 ARINC 566A Mark 3 VHF Communications Transceiver
 ARINC 569 Airborne Distance Measuring Equipment
 ARINC 569 Heading and Altitude Sensor (HAS)
 ARINC 571 Inertial Reference System (INS)
 ARINC 572 Mark 2 Air Traffic Control Transponder
 ARINC 573 Aircraft Integrated Data System (AIDS) Mark 2
 ARINC 574 Passenger Announcement, Entertainment & Service Multiplex System
 ARINC 575 Mark 3 Subsonic Air Data System (Digital)
 ARINC 576 Mark 4 Subsonic Air Data System
 ARINC 577 Audible Warning System
 ARINC 578 Airborne ILS Receiver
 ARINC 579 Airborne VOR Receiver
 ARINC 585 Electronic Chronometer System
 ARINC 591 Quick Access Recorder For Aids System (OAR)
 ARINC 592 Airborne Passenger Tape Record
 ARINC 594 Ground Proximity Warning System (GPWS)
 Page 41
 EUROCONTROL AIRIAL
 Acronym Full form
 ARINC 595 Barometric Altitude Rate Computer
 ARINC 596 Mark 2 Airborne SELCAL System
 ARINC 597 Aircraft Communications Addressing And Reporting System (ACARS)
 ARINC 597A Enhanced ACARS Avionics
 ARINC 59MA Airborne Announcement Tape Reproducer
 ARINC 600 Air Transport Avionics Equipment Interfaces
 ARINC 601 Control/Display Interfaces
 ARINC 602 Test Equipment Guidance
 ARINC 602A Test Equipment Guidance
 ARINC 603 Airborne Computer Data Loader
 ARINC 604 Guidance For Design And Use Of built-In Test Equipment (BITE)
 ARINC 605 Users Guide For ARINC 616 Avionics Subset Of ATLAS Language
 ARINC 606 Guidance For Electrostatic Sensitive Device Utilisation & Protection, Sup. 1
 ARINC 608 Standard Modular Avionics Repair And Test System (SMART)
 ARINC 609 Design Guidance For Aircraft Electrical Power Systems
 ARINC 610 Guidance For Design and Integration of Aircraft Avionics Equipment In Simulators, Supplement 1
 ARINC 611 Guidance For The Design and Installation Of Fuel Quantity Systems, Sup. 1
 ARINC 612 BITE Glossary
 ARINC 613 Guidance for Using the Ada Programming Language in Avionics Systems
 ARINC 614 Standard Firmware Loader For Avionics Shops
 ARINC 615 Airborne Computer High Speed Data Loader, Supplement 3
 ARINC 616 Avionics Subset of ATLAS Language
 ARINC 620 Data Link Ground System Standard And Interface Specification
 ARINC 623 North American Specification for ACARS-Based Messages
 ARINC 624 Design Guidance For Onboard Maintenance System
 ARINC 626 Standard ATLAS For Modular Test
 ARINC 627 Programmers Guide For Smart Systems Using ARINC 626 ATLAS
 ARINC 629 Multi Tester Data Bus
 ARINC 629 Multi-Transmitter Data Bus
 ARINC 631 Aviation Packet Communications Functional Description
 ARINC 651 Design Guidance For Integrated Modular Electronics
 ARINC 659 Backplane Data Bus for Integrated Modular Avionics
 ARINC 701 Flight Control Computer System
 ARINC 702 Flight Management Computer, Supplement 4 & 5
 Page 42
 EUROCONTROL AIRIAL
 Acronym Full form
 ARINC 703 Thrust Control Computer
 ARINC 704 Inertial Reference System, Supplement 6
 ARINC 705 Altitude and Heading Reference System (AHRS)
 ARINC 706 Subsonic Air Data System
 ARINC 707 Radio Altimeter, Supplement 6
 ARINC 708 Airborne Weather Radar
 ARINC 709 Airborne Distance Measuring Equipment, Supplement 8
 ARINC 709A Precision Airborne Distance Measuring Equipment
 ARINC 710 Mark 2 Airborne ILS Receiver
 ARINC 711 Mark 2 Airborne VOR Receiver
 ARINC 714 Mark 3 Airborne SELCAL Systems
 ARINC 715 Airborne Passenger Address Amplifier
 ARINC 716 Airborne VHF Communications Transceiver
 ARINC 717 Flight Data Acquisition And Recording System
 ARINC 718 Mark 3 ATC Transponder
 ARINC 719 Airborne HF/SSB System
 ARINC 720 Digital Frequency/Function Selection for Airborne
 ARINC 722 Electronic Equipment Protection Video System
 ARINC 723 Ground Proximity Warning System (GPWS)
 ARINC 724 Mark 2 Aircraft Communications
 ARINC 724A Mark 2 ACARS Avionics
 ARINC 724B Aircraft Communications Addressing and Reporting System (ACARS)
 ARINC 725 Electronic Flight Instruments (EFIS)
 ARINC 726 Flight Warning Computer System
 ARINC 727 Airborne Microwave Landing System
 ARINC 728 Avionics Refrigeration and Cooling System (ARCS)
 ARINC 729 Analog And Discrete Data Converter System
 ARINC 730 Airborne Separator Assurance System
 ARINC 731 Electronic Chronometer
 ARINC 732 Mark 2 Airborne Passenger Audio Entertainment Tape Reproducer, Supplement 1
 ARINC 735 Traffic Alert and Collision Avoidance System (TCAS), Supplement 1
 ARINC 737 On Board Weight and Balance System. Supplement 1
 ARINC 738 Air Data and Inertial Reference System (ADIRS)
 ARINC 739 Multi-Purpose Control and Display Unit
 Page 43
 EUROCONTROL AIRIAL
 Acronym Full form
 ARINC 740 Multiple-Input Cockpit Printer
 ARINC 7411P2 Aviation Satellite Communication System Part 2 - Satellite Design
 ARINC 741P1 Aviation Satellite Communication System Part I - Aircraft Installation Provisions
 ARINC 741P4 Aviation Satellite Communications System Part 4 - Specification and Description Language
 ARINC 742 Design Guidance For Windshear Warning and Guidance Equipment
 ARINC 743 Airborne Global Positioning System Receiver
 ARINC 743A GPS/GLONASS Sensor
 ARINC 744 Full Format Printer
 ARINC 745 Automatic Dependent Surveillance, Supplement 1
 ARINC 746 Cabin Communications System, Supplement 1
 ARINC 747 Flight Data Recorder
 ARINC 748 Communications Management Unit (CMU)
 ARINC 750 VHF Data Radio (VDR)
 ARINC 751 Gate-Aircraft Terminal Environment Link (Gatelink) - Aircraft Side
 ARINC 752 TFTS Airborne Radio Sub-System
 ARINC 753 HF Data Link System
 ARINC 757 Cockpit Voice Recorder (CVR)
 ARINC539A Airborne 400 Hz AC Tape Reproducer
 ARISE ASEAN Regional Integration Support by the EU
 ARJE Advanced Remote Job Entry
 ARLO Air Liaison Officer
 ARM Armenia
 ARM Air Request Message
 ARM Asynchronous Response Mode
 ARM ADS Report Message
 ARM Aerodrome Resource Management
 ARM Anti-Radiation Missile
 ARM Availability, Reliability and Maintainability
 ARMATS Armenian Air Traffic Services
 ARMATS Armenian ANSP
 ARMC Administrative Reform Monitoring Committee
 ARMET forecast upper wind & temperature
 ARMWG Agency Risk Management Working Group
 ARN Ats Routes & associated Navigation means
 Page 44
 EUROCONTROL AIRIAL
 Acronym Full form
 ARN ATS Route Network (Réseau de routes ATS)
 ARN ATS Routes and Associated Navigation Means
 ARN Aeronautical Route Network
 ARN-1 (Table) Basic ATS Route Network in the Lower and Upper Airspace
 ARN-2 (Table) Radio Navigation Aids Associated with the Basic ATS Route Network Terminal Area and Instrument Approach
 Procedures
 ARN-V2 ATS Route Network - Version 2 (ECAC, EATMP)
 ARN-V3 ATS Route Network - Version 3 (ECAC, EATMP)
 ARNG ARraNGe
 ARNSS Aeronautical Radio Navigation Services
 ARNV5 ATS Route Network Version 5
 ARNVST ATS Route Network Very Short Term
 ARO Air Traffic Services Reporting Office
 AROS Aeronautical Reporting Office
 ARP Azimuth Reference Pulse
 ARP Automated Route Planning
 ARP Address Resolution Protocol
 ARP Aerospace Recommended Practice
 ARP Air RePort (message type designator)
 ARP Aerodrome Reference Point
 ARP/TF Task Force on Arrangements and Regulatory Processes governing the Route Charges System under the
 revised Convention (Équipe spéciale sur le cadre institutionnel et les processus de réglementation qui régiront
 le Système de redevances de route sous le régi
 ARPA Advanced Research Projects Agency
 ARPANET ARPA Network
 Arpas UK ARPAS UK ¿ Association of Remotely Piloted Aircraft Systems in the UK
 ARPL ADEXP repetitive flight plan message (Message de plan de vol répétitif ADEXP)
 ARQ Automatic ReQuest for repeat (or retransmission).
 ARQ Automatic Repeat Request
 ARQ Automatic Response to Query
 ARR ARRive, ARRival (message type designator)
 ARR institutional ARRangements
 ARR SP Arrival Sequence Planner
 ARS Aeronautical Radio Navigation Service
 ARS Avoidance Routing scheme
 Page 45
 EUROCONTROL AIRIAL
 Acronym Full form
 ARS Administrative Region Selector
 ARS Automatic Route Selection
 ARS Agency Safety Regulation
 ARSA Airport Radar Service Area
 ARSC Administrative Reform Steering Committee (EUROCONTROL)
 ARSC Air Rescue Sub Centre
 ARSR Air Route Surveillance Radar (aircraft equipment) (US)
 ARST ARreSTing
 ART Antenna Revolution Time
 ART Analysis and Replay Tool
 ART-DACO ARTAS Dataflow Controller
 ARTAS ATM Surveillance Tracker and Server System (Système de poursuite et serveur radar ATC)
 ARTAS TF ARTAS Task Force
 ARTAS/CAM OS ATM Surveillance Tracker and Server / Central ARTAS Maintenance and Operational Support
 ARTCC Air Route Traffic Control Centre (US)
 ARTEMIS Advanced Relay and Technology Mission Satellite
 Artemis An ESA experimental telecommunications satellite hosting an EGNOS navigation transponder
 ARTES 9 Advanced Research in Telecommunication Systems
 ARTF Administrative Reform Task Force (Équipe spéciale sur la réforme administrative)
 ARTS Automated Radar Terminal System
 ARTS Area Radar Training Squadron (US)
 ARU Airspace Reservation Unit
 ARU ARCHIVE to Unix
 ARWG Administrative Reform Working Group (Groupe de travail sur la réforme administrative)
 ARYM Ancienne République Yougoslave de Macédoine = FYROM
 AS Anti-Spoofing
 AS Airborne Surveillance
 AS Altimeter Settings
 AS AIRAC Support team (Équipe « Appui AIRAC »)
 as AltoStratus
 AS Application Services
 AS Airspace
 AS Airspeed
 ASA Airborne Separation Assurance
 Page 46
 EUROCONTROL AIRIAL
 Acronym Full form
 ASA American Standards Association (old title of the present ANSI)
 ASA Automatic Slot Assignment
 ASA Airborne Surveillance Application
 ASA Automated Support to ATS (Appui automatisé à l'ATS)
 ASA Airborne Separation Assistance
 ASA Aircraft Situation Awareness
 ASA Aircraft Surveillance Applications
 ASA Aviation Safety Alliance
 ASA System Automatic Slot Assignment System
 ASA Airspace Safety Analysis Group
 ASA Automated Support to ATS
 ASACS Air Surveillance and Control System
 ASAG Automated Support to ATS Focus Group
 ASAP Alcohol & Substance Abuse Policy
 ASAP As soon as possible / practicable
 ASAP Aircraft Separation Assurance Programme
 ASAP Advanced Sectorization & Automation Project (Avinor Oslo)
 ASAP Advanced System Architecture for Postscript
 ASAP Alternative Slot Allocation Procedure
 ASARP ACAS Safety Analysis post-RVSM Project
 ASARS Air Surveillance Airborne Radar System
 ASAS Airborne Separation Assistance/Assurance System (Système embarqué d'aide à la séparation)
 ASAS-TN ASAS Thematic Network
 ASASA Agenda to Support Aviation Safety in Africa
 ASAT Actual Start-Up Approval Time
 ASATC Aviation Safety and Air Traffic Control project (Projet "Sécurité de l'aviation et contrôle du trafic aérien")
 ASB ANSP Strategic Board
 ASBT Actual Start Boarding Time
 ASBU Aviation System Block Upgrade (ICAO)
 ASC Education allowance (Allocation scolaire)
 ASC Aviation System Coordinator
 ASC Advisory Scientific Committee (comité scientifique consultatif)
 ASC ASCent, ASCending To ...
 ASC Ascending
 Page 47
 EUROCONTROL AIRIAL
 Acronym Full form
 ASCAP Automatic SSR Code Assignment Procedure
 ASCB Avionics Standard Communication Bus
 ASCII American Standard Code for Information Interchange
 ASCOS Aviation Safety and Certification of new Operations and Systems
 ASCOT Airport Slots Compliance Tools
 ASD Aircraft Situation Display
 ASD Aerodrome Standards Division (UK CAA)
 ASD Air Situation Display
 ASD Acceleration Spectral Density
 ASD Avionic System Division
 ASD ATM Service Delivery
 ASD AeroSpace & Defence Industries Association of Europe
 ASD-TF Air Situation Display Task Force
 ASDA Accelerate Stop Distance Available
 ASDAR Aircraft to Satellite Data Relay
 ASDE Airport Surface Detection Equipment
 ASDE Airport Surveillance Detection Equipment
 ASDE Airfield Surface Detection Equipment
 ASDIC Anti-Submarine Detection & Identification Committee
 ASDT Actual Start-Up Clearance Delivery Time
 ASE Altimetry System Error
 ASE Agence Spatiale Européenne - ESA
 ASE Application Service Element
 ASE ATM System Engineering (Systémique de l'ATM)
 ASE-TF ATM System Engineering Task Force (EATM)
 ASEAN Association of South-East Asian Nations
 ASECNA Agency for the safety of air navigation in Africa and Madagascar (Agence pour la Sécurité de la Navigation
 Aérienne en Afrique et à Madagascar)
 ASEP ACCS Surveillance Exploratory Prototype (NATO / SHAPE)
 ASEP Airborne Separation
 ASEP C&P Airborne Separation Crossing & Passing
 ASEP-ITP Airborne Separation - In Trail Procedure
 ASEs Application Service Elements
 ASFA Airborne Surveillance Functional Architecture (project)
 Page 48
 EUROCONTROL AIRIAL
 Acronym Full form
 ASFCG Aeronautical Spectrum and Frequency Consultation Group
 ASHTAM NOTAM relating to volcanic and/or dust activity (ICAO)
 ASI Air Speed Indicator
 ASI Aerospace Sciences Inc.
 ASI Forum Airborne Surveillance Infrastructure
 ASIA Approach Spacing for Instrumented Approach
 ASIA Asia (ICAO Region)
 ASIC Application Specific Integrated Circuit
 ASIM ATS Simulator System
 ASIT Administration & Services of Information Technologies (Administration et prestation des services IT)
 ASIVAL Assessment of the ATM System Configuration Subject to Validation
 ASK Amplitude-Shift Keying
 ASK Available Seat Kilometre
 ASL ATM Service Levels
 ASLT Advanced Solid Logic Technology
 ASM Airspace Management (Gestion de l'espace aérien)
 ASM Auxiliary Storage Manager
 ASM Available Seat Mile
 ASM Ad-hoc Scheduling Message
 ASM ASsuMe (control)
 ASM SG Airspace Management Sub-Group (Sous-groupe "Gestion de l'espace aérien")
 ASM-HB Airspace Management Handbook
 ASM-SG Airspace Management Subgroup (EATM) (Sub-Group of ANT) / Sous-groupe "Gestion de l'espace aérien"
 ASM-TD Airspace Management - Tool Demonstrator
 AsMA Aerospace Medical Association
 ASMA Arrival Sequencing and Metering Area
 ASMAC Automated System for Management of Aeronautical Charting
 ASMC Aerodrome Surface Movement Control
 ASMC Airspace Management Communications
 ASMF Airspace Management Function
 ASMI Airfield Surface Movement Indicator
 ASMSG Airspace Management Sub-Group/ Sous-groupe "Gestion de l'espace aérien"
 ASMT Automatic Safety Monitoring Tool
 ASMTF Airspace Management Task Force
 Page 49
 EUROCONTROL AIRIAL
 Acronym Full form
 ASN Aviation Safety Network
 ASN Abstract Syntax Notation
 ASN 1 Abstract Syntax Notation One
 ASN.1 Abstract Syntax Notation No. 1
 ASNO Approach Sequence Number
 ASO Air Surveillance Officer
 ASO Agency Security Office (EUROCONTROL)
 ASO Application Service Object
 ASOC Air Sovereignty Operations Centre
 ASOC Army Support Operations Centre
 ASOP Airspace Organisation and Procedures
 ASOR Allocation of Safety Objectives and Requirements
 ASOS Automated Surface Observing System
 ASP Air Navigation Service Providers (ANSP) as written in ECIP
 ASP Air Situation Picture
 ASP Air Space
 ASP ATM Service Provider
 ASP Aeronautical Surveillance Panel
 ASP Adjustable System Parameter (ODS)
 asp Assigned Speed
 ASP AIRCOM Service Processor (SITA)
 ASP Aeronautical Information Service Staff Profile Task Force
 ASP Actual Surveillance Performance
 ASP Air Navigation Service Provider
 ASP Arrival Sequence Planner
 ASPA ASAS Spacing
 ASPA Airborne Spacing Application
 ASPA - ITP AS application - In-trail procedure in oceanic airspace
 ASPA - S&M AS application - Enhanced sequencing and merging operations
 ASPA-C Enhanced crossing and passing operations
 ASPA-ITP Airborne Spacing
 ASPA-S&M ASPA - Sequencing & Merging
 ASPH ASPHalt
 ASPIRE Asia and South Pacific Initiative to Reduce Emissions
 Page 50
 EUROCONTROL AIRIAL
 Acronym Full form
 ASPL Abbreviated System Flight Plan (N-FDPS)
 ASPM Aviation System Performance Metrics (FAA)
 ASPP Aeronautical Fixed Service and System Planning Panel
 ASQF Application Specific Qualification Facility (EGNOS)
 ASR Automatic Send / Receive
 ASR BD Agency Safety Regulatory Business Division (EUROCONTROL)
 ASR Auxiliary storage Save / Restore
 ASR Agency Safety Regulator
 ASR Air Safety Report
 ASR Airfield Surveillance Radar
 ASR Airport Surveillance Radar (TAR)
 ASRB Agency Safety Regulation Bureau (EUROCONTROL)
 ASRO Agency Safety Regulatory Oversight Unit (Unité de supervision réglementaire de la sécurité de l'Agence)
 ASRS Aircraft Status Report Service
 ASRS Aviation Safety Reporting System (US)
 ASRT Actual Start up Clearance Request Time
 ASRT Air Support Radar Team
 ASSA Airport surface situational awareness
 ASSAP Airborne Surveillance and Separation Assistance Processing
 ASSI Aviation Safety Services International
 ASSIM Airspace Security Incident Management
 ASSIST Acknowledge, Separate, Silence, Inform, Support and Time (Accuser réception, Séparer, faire le Silence,
 Informer, Soutenir et laisser du Temps)
 ASSIST Assistance for SES Implementation to Stakeholders
 ASSP Application Specific Standard Product
 ASSR Assigned SSR code (FPPS/DECADE)
 ASSTAR Advanced Safe Separation Technologies and Algorithms
 AST Airspace Structure (Structure de l'espace aérien)
 AST Annual Summary Template
 AST-FP Annual Summary Template Focal Point (Correspondant AST national)
 ASTA Atc Strategic & Tactical Adviser (EUROCONTROL)
 ASTA Airport Surface Traffic Automation
 ASTAAC Arithmetic Simulation Tool for ATFCM and Advanced Concepts
 ASTAC Aviation Safety and Air Traffic Control
 Page 51
 EUROCONTROL AIRIAL
 Acronym Full form
 ASTER Aviation Safety Targets for Effective Regulation
 ASTERIX All-purpose Structured EUROCONTROL Surveillance Information Exchange (formerly "All-purpose Structured
 EUROCONTROL Radar Information Exchange")
 ASTF Air Server Task Force
 ASTP ADS Studies and Trials Project
 ASTRA Customised version of ARTAS designed for airport surveillance
 ASU ATM Surveillance Units
 ASU ACAS Support Unit
 ASUP Amsterdam SUPervisor
 ASW Air Situation Window
 ASW Anti-Submarine Warfare
 AT Aircraft Type
 AT Access and Terminals
 AT Actual Time Count Down
 AT Active Target
 AT At Time
 AT Austria, Republic of Austria (ISO Country Code)
 AT Actual Time countdown
 AT Adjacent Tracked
 AT Air Transport
 AT-SAT Air Traffic Selection and Training (US)
 AT1 Active Target 1
 AT2 Active Target 2
 AT3 Active Target 3
 AT4 Active Target 4
 ATA Actual Time of Arrival
 ATA Air Traffic Alliance
 ATA Air Transport Association (of America)
 ATA 100 Air Transport Association (numbered definitions)
 ATAA Air Traffic and Airport Administration
 ATAAS Advanced Terminal Area Approach Spacing
 ATAC Airspace Traffic Data Capture
 ATAF Allied Tactical Air Force / Force Aérienne Tactique (=FATA)
 ATAFF Air Traffic Arbitrated Free Flight
 Page 52
 EUROCONTROL AIRIAL
 Acronym Full form
 ATAG Air Transport Action Group (Groupe d'action du transport aérien)
 ATAR Automatic Air Reporting
 ATARS Automatic Traffic Avoidance and Resolution System
 ATAS Air Traffic Advisory Service
 ATB Air Transport Bureau (ICAO)
 ATC Air Traffic Control (contrôle de la circulation aérienne)
 ATC EUC Air Traffic Controller European Unions Coordination
 ATC-HMI Air Traffic Control Human Machine Interface
 ATC-TRG Air Traffic Control TRaininG tool
 ATC/AD Air Traffic Control / Air Defence
 ATC2ATM Air Traffic Control to Air Traffic Management
 ATCA Air Traffic Control Association (US)
 ATCA Allied Tactical Communications Agency
 ATCA Air Traffic Control Assistant
 ATCAF ATC Advanced Functions
 ATCAP Air Traffic Control Automation Panel (ICAO)
 ATCAS (Sweden) ATC Automated System
 ATCC Air Traffic Control Clearance
 ATCC Air Traffic Control Centre / Centre de Contrôle de la Circulation Aérienne
 ATCEUC Air Traffic Controllers European Unions Coordination
 ATCgram Illustration in graph form of the main functional levels of ATC systems
 ATCI Airport ATC and Information systems
 ATCI Air Traffic Control Instructions
 ATCITP ATC Instructor Training Plan
 ATCO Air Traffic Control Organisation
 ATCO Air Traffic Control Officer, Air Traffic Controller (contrôleur de la circulation aérienne)
 ATCO TO Air Traffic Controller Training Organisation
 ATCOTS Air Traffic Control Optimum Training Solution
 ATCRBS Air Traffic Control Radar Beacon System (USA, referring to SSR)
 ATCRU Air Traffic Control Radar Unit
 ATCS Air Traffic Control Service / Service du Contrôle du Trafic Aérien (=SCTA)
 ATCS Air Traffic Control Services
 ATCSCC Air Traffic Control System Command Center (US)
 ATCSQ Air Traffic Control Safety Questionnaire
 Page 53
 EUROCONTROL AIRIAL
 Acronym Full form
 ATCT Airport Traffic Control Tower
 ATCU Air Traffic Control Unit
 ATD Actual Time of Departure
 ATD Air Traffic Services Development
 ATD ARTAS Test Description (FAT)
 ATD Air Traffic Control & Data Processing
 ATD Along Track Distance
 ATDMA Asynchronous Time Division Multiple Access
 ATDS Airborne Tactical Data System
 AtDSUP Assistant Duty Supervisor
 ATE Automatic Test Equipment
 ATE Actual Time Of Entry (of aircraft into AIRSPACE_VOLUME)
 ATFC Air Traffic Flow Controller (Contrôleur-régulateur des courants de trafic aérien)
 ATFCC Air Traffic Flow and Capacity Controller
 ATFCM Air Traffic Flow and Capacity Management (gestion des courants de trafic aérien et de la capacité)
 ATFM Air Traffic Flow Management (Gestion des courants de trafic aérien)
 ATFMC ATFM Component
 ATFMC Air Traffic Flow Management Communications
 ATFMO Air Traffic Flow Management Organisation
 ATFMP Air Traffic Flow Management Position
 ATFMS Air Traffic Flow Management System
 ATFMS Air Traffic Flow Management Service
 ATFMU Air Traffic Flow Management Unit
 ATFMX = flight is exempt from Air Traffic Flow Measures (ATFM) by the appropriate ATS authority
 ATFR Air Traffic Flow Regulator
 ATFSM Automated(/ic) Treatment of Flight Safety Messages
 ATG Air Traffic Generator
 ATG At The Glass
 ATH Athinai FMU
 ATI ATM Implementation (EEC)
 ATI Automatic Tracking Initiation
 ATIC Administrative and Technical Inspection Committee (Agency structure) / Mission d'Inspection administrative et
 technique (=MIAT)
 ATIDS Airport Surface Target Identification System
 Page 54
 EUROCONTROL AIRIAL
 Acronym Full form
 ATIEC Air Transportation Information Exchange Conference
 ATIF ATN Trials Infrastructure (Infrastructure pour les essais ATN)
 ATILO Administrative Tribunal of the International Labour Organization / Tribunal Administratif de l'Organisation
 internationale du Travail (=TAOIT)
 ATIS Automatic Terminal Information Service
 ATLAS Air Traffic Land & Airborne Systems (European Commission)
 ATM Asynchronous Transfer Mode
 ATM Air Traffic Management (gestion du trafic aérien)
 ATM Directorate Air Traffic Management
 ATM Air Transport Movement
 ATM 2000 + ATM Strategy for the years 2000+ (Stratégie de la gestion de la circulation aérienne pour les années 2000+)
 ATM 2000+ SB ATM 2000+ Strategy Board
 ATM MP ATM Master Plan
 ATM R&D RG European ATM Research and Development Programme Review Group
 ATM-IS ATM Information Service
 ATM-NMF Air Traffic Management Network Management Function
 ATM-SE ATM Specific Technical Events
 ATM/CMC ATM Civil-Military ATM Coordination
 ATM/CNS Air Traffic Management/ Communications Navigation Surveillance
 ATM/LT Air Traffic Management/ Long-term Target
 ATM/OFF ATM/Office of the Director
 ATM/RDS ATM/R&D and SESAR Contribution Management
 ATM/runway Air Traffic Management
 ATM/STR ATM Strategies
 ATM2000 EUROCONTROL Air Traffic Management Strategy for the years 2000+
 ATMAP ATM Airport Performance
 ATMARP ATM's Address Resolution Protocol
 ATMAS Air Traffic Management Automated System
 ATMAW Air Traffic Management Awareness
 ATMB ATM Policy Bureau
 ATMB Air Traffic Management Bureau (Civil Aviation Authority of China)
 ATMB/CRV Agency ATM Content Review Division
 ATMB/CRV/FRM Flexible Resource Management (ATMB)
 ATMB/SRE ATM Strategic Relations Division
 Page 55
 EUROCONTROL AIRIAL
 Acronym Full form
 ATMC Frankfurt FMU
 ATMC Air Traffic Management Centre
 ATMC Airspace & Traffic Management Centre, (Frankfurt)
 ATMCE ATMC Estimate (message type)
 ATMCP Air Traffic Management Operational Concept Panel (ICAO)
 ATMCT Air Terminal Movement Control Team Centre (NATS UK)
 ATMG Air Traffic Management Group
 ATMG Airspace and Traffic Management Group
 ATMGE Air Traffic Management Group-East (ICAO)
 ATMO Air Traffic Management Organisation
 ATMOS Air Traffic Management Operating System
 ATMPP ATM Performance Partnership
 ATMRPP ATM Requirements and Performance Panel
 ATMS Advanced Air Traffic Management System
 ATMS Air Traffic Management System
 ATMS Advanced Text Management System
 ATN Aeronautical Telecommunication(s) Network / Réseau de télécommunications aéronautiques
 ATN EURET see EURATN
 ATN RD Aeronautical Telecommunication Network Routing Domain
 ATN RDC Aeronautical Telecommunication Network Routing Domain Confederation
 ATN-ES ATN End-System
 ATN-VDL Aeronautical Telecommuncations Network / VHF Digital Link
 ATNAVICS Air Traffic Navigation, Integration and Coordination System
 ATNC ATN and Communication Architecture
 ATNI Aeronautical Telecommunication Network Internet
 ATNI ATN Implementation
 ATNI-TF ATN Implementation Task Force
 ATNP Aeronautical Telecommunication Network Panel (Groupe d'experts du réseau de télécommunications
 aéronautiques)
 ATNS Air Traffic and Navigation Services
 ATNSI ATN System Inc. (US)
 ATO Airborne Traffic Observation
 ATO Actual Time Over
 ATO Actual Time Overhead or Overflying
 Page 56
 EUROCONTROL AIRIAL
 Acronym Full form
 ATO Air Traffic Organization (FAA)
 ATOBIA Air Transport Operators Benefit Incentive Analysis
 ATOC Allied Tactical Operations Centre
 ATOCC Air Transportation Operations Consultation Committee (Canada)
 ATOP Advanced Technologies and Oceanic Procedures
 ATOPS Advanced Transport Operating System
 ATOT Actual Take-Off Time
 ATOW Actual Take-Off Weight
 ATP ARTAS Test Plan (FAT)
 ATP At ... Time, Place
 ATPL Airline Transport Pilot's Licence
 ATR Anti-Transmit / Receive
 ATR ARTAS Test Results (FAT)
 ATR ARTAS Trouble Report
 ATR Air Transport Racking
 ATRAC Air Navigation Services Employee Training Concept
 ATRACC ATC System for Riga Area Control Centre
 ATRJ accident on journey (accident de trajet) (CHRONOTIME)
 ATRK Alone Track Error
 ATRS Air Transport Research Society
 ATRV accident at workplace (accident du travail) (CHRONOTIME)
 ATS Alternate Time Sources
 ATS Air Traffic Services (services de la circulation aérienne)
 ATS Advanced Traffic Services
 ATS ATC applications & Systems (Applications et systèmes ATC)
 ATS Advanced Telecommunications Services
 ATS BD Air Traffic Services Business Division (EUROCONTROL)
 ATS-IP Air Traffic Services IP network
 ATS-No.5 Air Traffic Services Number 5 signalling protocol
 ATS-QSIG Air Traffic Services Signalling at the Q reference point
 ATS-R2 Air Traffic Services- R2 signalling protocol
 ATSA Air Traffic Services Authority (Bulgaria)
 ATSA Airborne Traffic Situational Awareness
 ATSA Air Traffic Situational Awareness
 Page 57
 EUROCONTROL AIRIAL
 Acronym Full form
 ATSA-AIRB Air Traffic Situational Awareness Airborn
 ATSA-ITP Air Traffic Situation Awareness - In Trail Procedure
 ATSA-SURF Air Traffic Situational Awareness Surface
 ATSA-SVA AS application - Enhanced successive visual approaches
 ATSA-VSA Air Traffic Situational Awareness Visual Separation on Approach
 ATSAW Air Traffic Situational Awareness (Sensibilisation à la situation de trafic environnante)
 ATSC Air Traffic Services Communications
 ATSD Air Traffic Services Department of UK CAA
 ATSD Air Traffic Situation Display
 ATSEP Air Traffic Safety Electronics Personnel
 ATSEX ATS External Communications
 ATSIN Air Traffic Services Information Notice (UK CAA)
 ATSIS Air Traffic Services Investigation System
 ATSL Approved Technology Standards List
 ATSMHS ATS Message Handling Service
 ATSMS Air Traffic Services Message Service
 ATSN Air Traffic Service Network
 ATSO Air Traffic Services Organisation
 ATSO Air Traffic Services Operator
 ATSORA Air Traffic Services Outside Regulated Airspace
 ATSP Air Traffic Service Provider
 ATSQSIG ATS Q Signalling Protocol
 ATSRO Air Traffic Services Reporting Office
 ATSSD ATS Standards Department
 ATSU Air Traffic Service Unit
 ATSup Air Traffic Supervisor
 ATT Along Track Tolerance
 ATT Actual Time at Target
 ATT aircraft ATTitude (Indicator)
 ATT Attitude
 ATTAS Advanced Technologies Testing Aircraft System (Banc d'essais volant destiné à l'étude des technologies de
 pointe applicables aux avions civils)
 ATTN ATTentioN
 ATTOT Aircraft Operator Target Take-Off Time
 Page 58
 EUROCONTROL AIRIAL
 Acronym Full form
 ATTT Actual Time To Turnround
 ATV reduction of work time (raccourcissement temps travail) (CHRONOTIME)
 ATW Along Track Waypoint
 ATWR Apron TWR
 ATX Actual Time Of Exit (of aircraft from AIRSPACE_VOLUME)
 ATYP Aircraft TYPe
 ATZ Aerodrome Traffic Zone
 AU Airspace User
 AU Administrative Unit
 AU Air Navigation Unit
 AU Access Unit
 AU Arbitrary Unit
 AU-31 Administrative Unit-31
 AU-32 Administrative Unit-32
 AU-4 Administrative Unit-4
 AUA ATC Unit Airspace
 AUAG ATC Units Airspaces Grouping
 Aud Audio aids
 AUE AUEnhausen (Air Defence Station)
 Aug AUGust
 AUG ARTAS User Group (Groupe des utilisateurs de l'ARTAS)
 AUI Access Unit Interface
 AUO Airspace User Operations
 AUP Acceptable Use Policy (Politique d'utilisation acceptable)
 AUP Airspace Use Plan (Plan d'utilisation de l'espace aérien)
 AURA Airspace Utilisation Rules and Availability
 AUS Airspace Utilisation Service
 AUSTRO CONTROL Österreichische Gesellschaft für Zivilluftfahrt mbH (AT)
 AUT AUTomatic
 AUTH AUTHorised, AUTHorisation
 AUTO initiate a track AUTOmatically using speed vector
 AUTOCAD Automatic Computer Aided Design
 AutoNav Auto-Navigation
 AUTONAV Autonomous Navigation
 Page 59
 EUROCONTROL AIRIAL
 Acronym Full form
 AUTOPS Autonomous Flight Operations
 AUTOVON Automatic Voice Network
 AUW All Up Weight
 AUX AUXiliary
 AV Airspace Volume
 AV Airspace data validation team (Équipe « Validation des données d'espace aérien »)
 AV Audio-visual aids
 AVAL ACAS on VLJs and LJs - Assessment of Safety Level
 AVANA approval void if aircraft not airborne by [time]
 AVASI Abbreviated Visual Approach Slope Indicator
 avasis Abbreviated Visual Approach Slope Indicator System
 AVBL AVailaBLe, AVailaBiLity
 AVC NATO Aviation Committee (Comité OTAN de l'aviation)
 AVD Alternate Voice/Data
 AVDGS Advanced Visual Docking Guidance System
 AVE Avis de vacance d'emploi
 AVENUE ATM Validation Environment for Use towards EATMS (Projet AVENUE (Environnement de validation ATM
 pour la transition vers l'EATMS))
 AVG Approach with Vertical Guidance
 AVG Average
 AVGAS AViation GASoline
 AVI Audio / Visual Interleaved
 AVINOR Norwegian Air Navigation Service Provider
 AVION Appareil Volant Imitant les Oiseaux Naturels
 AVLC Aviation VHF Link Control
 AVM MADAP Data Available
 AVNET Assitenza al Volo Network (IT)
 AVOL Aerodrome Visibility Operational Level
 AVPAC Aviation VHF Packet Communications
 AVS Adjust Vertical Speed
 AVS SARP Data Available
 AVSEC Aviation Security (Unit of DSS CMAC ) - Unité "Sûreté de l'aviation".
 AVSSSG Air traffic services Voice Switching and Signalling Study Group
 AVT ADS Validation Testbed
 Page 60
 EUROCONTROL AIRIAL
 Acronym Full form
 AVT ADS-B/TIS-B Validation Testbed (Banc d'essai de l'ADS-B et du TIS-B)
 AW Aerial Work
 AW Area Width
 AW Aerial Work
 AW/P Active Way Point
 AWACS Airborne Warning and Control System / Système de détection aéroporté (=SDA) (E-3A aircraft)
 AWARE Ground Traffic Situation Awareness Tool
 AWE Adaptable Windowing Environment
 AWF Automatische Wahlvermittlung für die Flugsicherung
 AWG Area Working Group (Groupe de travail sectoriel)
 AWG American Wire Gauge
 AWIPS Advanced Weather Interactive Processing System
 AWIR Automatically generated What-If Re-routing / Outil de Simulation Automatique des Réacheminements
 AWIS Aerodrome Weather Information System
 AWIS Aerodrome Weather Information System
 AWO All Weather Operations
 AWOG All Weather Operations Group
 AWOP All Weather Operations Panel (ICAO)
 AWOS Automatic Weather Observing System
 AWP Ancillary Working Position
 AWP Arrival Waypoint
 AWR Airborne Weather Radar
 AWS Aerial Warning System
 AWX All Weather
 AWY Airway
 AX ADEXP Templates
 AXI Auto transmission Inhibited
 AXIT Actual Taxi-In Time
 AXOT ActualTaxi-Out Time
 AXP Adaptive cross Parity checking
 AXT Crossing the holding stop bar
 AZ Azimuth
 AZ Aerodrome zone
 AZ Azerbaijan (ISO country code)
 Page 61
 EUROCONTROL AIRIAL
 Acronym Full form
 AZ Aerodrome sets
 AZANS Azerbaijan ANSP
 AZERTY (arrangement of keys on keyboard, French style)
 b Byte(s)
 B Belgium
 B RNAV Basic RNAV
 B&A Business and Administration Unit (IANS)
 B&D Bearing and Distance
 B&H Bosnia and Herzegovina
 B-AMC Broadband Aeronautical Multi-Carrier Communication System
 B-CAS Beacon Collision Avoidance System
 B-CDA Basic-Continuous Descent Approach
 B-ICI Broadband Inter Carrier Interface
 B-ISDN Broadband Integrated Service Digital Network
 B-QSIG Broadband QSIG
 B-RNAV Basic Area Navigation (Navigation de surface de base) (+/- 5nm 95% of the time)
 B-RNP Basic RNP 1
 B-VHF Broadband VHF
 B/C Benefit to Cost (ratio)
 B/CRS Back Course
 B/M TM Business/Mission Trajectory Management
 B2B Business-to-Business
 B2B-UP NM Business to Business User Panel
 B2C Business-to-Consumer / Business-to-Customer
 B30 a geodesic reference frame
 B747 Boeing 747 (an aircraft type)
 B8ZS Binary 8 Zero Substitution
 B8ZS Bipolar with 8 Zeros Substitution
 BA tellBack Area
 BA Business Aviation
 BA Bosnia and Herzegovina, Republic of Bosnia and Herzegovina (ISO Country Code)
 BA British Airways
 BA Braking Action
 BA Barometric Altitude
 Page 62
 EUROCONTROL AIRIAL
 Acronym Full form
 BAA British Airports Authority
 BAC Basic Access Control (US)
 BADA Base of Aircraft Data (Base de données d'aéronefs)
 BAe British Aerospace
 BAF Belgian Air Force
 BAF Bundesaufsichtsamt für Flugsicherung (German Federal Supervisory Authority for Air Navigation Services)
 BAFO Best And Final Offer
 BAFVK BetriebsAnweisung für den FlugVerkehrsKontrolldienst
 BAG British Airports Group
 BALUN BALanced / UNbalanced
 BAM Business Area Manager (Gestionnaire de domaine)
 BAM Balanced Asynchronous Mode
 BANC Baltic Air Navigation Cooperation
 BAR Barometric
 BARCS CRCO computer system for bilateral charges (Système de facturation des redevances mis en place par le
 SCRR au titre des accords bilatéraux)
 BARS Behaviour Anchored Rating Scales
 BARTCC Berlin Air Route Traffic Control Centre
 BASE cloud BASE
 Base AM Base Arrival Manager
 Base AMD Base Arrival Manager Display
 BASIC Beginners All purpose Symbolic Instruction Code
 BAST Basic ATC Skills Trainer (EUROCONTROL)
 BAT Barometric Pressure Setting Advisory Tool
 BAT BATtery
 BATAP 'Type-B' Application-To-Application Protocol
 BATR Bande d'atterrissage train rentré (Belly landing strip)
 BAW123 British Airways Flight 123
 BAW4123 British Airways Flight 4123
 BAZ Bundesamt für Zivilluftfahrt (Austria) (AT) / Austrian aviation authority
 BAZ Back Azimuth
 BBC British Broadcasting Corporation
 BBFM Business-Based Flow Management
 BC Before Christ
 Page 63
 EUROCONTROL AIRIAL
 Acronym Full form
 BC Basic Call
 BC Business Continuity
 BC Business Centre Section (from DEVD)
 BCA Border Crossing Authority
 BCAR British Civil Airworthiness Requirements
 BCAS Beacon based Collision Avoidance System
 BCBP Bilateral Communication Plan Coordination
 BCC Block Check Character
 BCC Block Count Check
 BCD Binary-Coded Decimal (digital coding)
 BCFG Fog Patches
 BCI Business Continuity Institute
 BCK Back-up
 BCM Business Continuity Management
 BCN BeaCoN (aeronautical ground light)
 BCP Boundary Crossing Point (N-FDPS)
 BCP Best Current Practices
 BCP Business Continuity Plan (Plan de continuité des activités)
 BCPG Business Continuity Process Group (groupe responsable du plan de continuité des activités)
 BCQ Body Clock Questionnaire
 BCS Block Check Sequence
 BCST BroadCaST
 BCWP Budgeted Cost of Work Performed
 BCWS Budgeted Cost of Work Scheduled
 BD Border
 Bd Baud
 BDAM Basic Direct Access Method
 BDE Batch Data Exchange
 BDL Bundesverband der Deutschen Luftverkehrswirtschaft (Federal Association of the German Air Transport
 Industry)
 BDP Bureau de Piste (FR)
 BDP Brussels ACC Computer
 BDR Battle Damage Repair
 BDRY BounDaRY
 Page 64
 EUROCONTROL AIRIAL
 Acronym Full form
 BDS Comm-B Data Selector
 BDS Comm-B Data Store
 BDS comm-B-Data Subfield
 BDS Board Data System
 BDS Binary Data Sub-field
 BDS-buffer B Data Selector - Buffer
 BDS1 BDS Sub-Field 1
 BDS2 BDS Sub-Field 2
 BDT Business Development Trajectory
 BDU Basic Data Unit
 BDY BounDarY(ies) & UAC sectors
 BDY Boundary Point (ENV entity type, used in all CHMI)
 BE Belgium (ISO Country Code)
 BE Belgium
 BEA Budget and Economic Affairs (Section « Budget et affaires économiques »)
 BEA Bureau d'Enquêtes et d'Analyses (France)
 BEAR BEARing
 BEBS Best Efficiency Best Served
 BECN Backward Error Congestion Notification
 BEE Bureau Européen de l'Environnement (FR)
 BEH Brussels East High
 BEI Banque Européenne d'Investissement / European Investment Bank (EIB)
 BEIDOU Chinese satellite navigation system
 BEL Brussels East Low
 BEL BELl (=bell)
 BELGOCONTROL FAA Belgium, ANSP
 BEM Boundary Estimate Message (SARP)
 BENELUX Belgium, Netherlands and Luxembourg
 BER Burst Error Rate
 BER Bit Error Rate
 BER Basic Encoding Rules
 BERD Banque européenne pour la reconstruction et le développement / European Bank for Reconstruction and
 Development (=EBRD)
 BERT Bit Error Rate Test, (or Tester).
 Page 65
 EUROCONTROL AIRIAL
 Acronym Full form
 BETA Benefit Evaluation by Testing an A-SMGCS
 BF Briefing Facilities
 BFD Basic Flight Data message
 BFIS Baggage Flow Information Service
 BFL Blocked Flight Level area
 BFO Beat Frequency Oscillator
 BFR BeFoRe
 BFS (Z) Bundesanstalt für Flugsicherung (Zentralstelle) (DE)
 BFTF Briefing Facility Task Force
 BFU Bundesstelle für FlugunfallUntersuchung (German Federal Bureau of Aircraft Accident Investigation)
 BFWG Budgetary and Financial Working Group (Groupe de travail budgétaire et financier (GTBF))
 BFWG-4 Budgetary and Financial Working Group (4 States)
 BG Bulgaria (ISO Country Code)
 BGAN Broadband Global Area Network
 BGD Background
 BGP Border Gateway Protocol
 BHA Brussels High Assistant controller
 BHANSA Bosnia and Herzegovina Air Navigation Services Agency
 BHCA Busy Hour Call Attempt
 BHDCA Bosnia and Herzegovina Directorate of Civil Aviation
 BHDOC Block Hour Direct Operating Costs
 BHL-System (Name of HR-registration system)
 BHP Brake Horse Power
 BHS baggage-handling systems
 BIA Business Impact Analysis (MIS)
 BIAC Brussels International Airport Company
 BIANCA Backup Integrated AeroNautical CommunicAtions
 BIC Best in Class
 BIF Deliver Implementation Benefits Faster (EATCHIP Adaptation)
 BIH Bureau International de l'Heure = International Time Bureau (ITB)
 BIN Broadcast Identification Number
 BINOC Belgian Integrated Network Operations Centre
 BIOS Basic Input / Output System
 BIP Business Information Publications
 Page 66
 EUROCONTROL AIRIAL
 Acronym Full form
 BIP Business Improvement Proposal
 BIRD Banque Internationale pour la Reconstruction et le Développement (ONU) / International Bank for
 Reconstruction and Development (=IBRD)
 BIRDTAM Bird hazard noTAM (NOTAM reporting bird hazard)
 BIS Business Intelligence System
 BIS Boundary Intermediate System
 BISAM Basic Indexed Sequential Access Method
 BISDN Broadband ISDN
 BIST Build-In Self Test (ODS)
 Bit Binary Digit
 BIT Built-In Test
 BIT/s BInary digiTs (bits) per Second
 BITE Built-In Test Equipment
 BKH Brussels Koksy High
 BKL Brussels Koksy Low
 BKN BroKeN
 Bldg BuiLDinG
 BLERT BLock Error Rate Test
 BLH Brussels Luxembourg High
 BLK BLocKed
 BLL Brussels Luxembourg Low
 BLNS BaLooNS
 BLO BeLOw clouds
 BLOS Beyond Line Of Sight
 BLSC Brétigny Local Staff Committee (comité local du personnel de Brétigny - CLPB)
 BLSN BLowing SNow
 BLUE MED Cyprus, Greece, Italy, Malta, Egypt, Tunisia FAB
 BLW BeLoW
 BM Business Manager
 BM Basic Measurement
 BMA Business Management (Gestion des activités)
 BMCS Backup Master Control Station
 BMD Briefing Meeting of Directors (Réunion de travail des Directeurs)
 BMD Basic Measurement Display
 Page 67
 EUROCONTROL AIRIAL
 Acronym Full form
 BMIC Bus Master Interface Controller
 BMP Batch Message Processing
 BMS Bureau Militaire de Standardisation (FR)
 BMS Building Management System
 BMST Bare Multi Sensor Tracker
 BMT Business/Mission Trajectory
 BMUN Better Meet User Needs (EATCHIP Adaptation)
 BN Bayesian Network
 BN Backbone Network
 BN Backbone Node (RMCDE/ RADNET)
 BN Briefing Note (OGHFA)
 BNC Backbone Network Computer (RADNET)
 BNC BayoNet Locking Coax (connector)
 BNF Backus-Naur Form
 BNH Brussels Nicky High
 BNIA Bureau national de l'informatique et d'assistance au vol
 BNL Benelux
 BNL Brussels Nicky Low
 BNLX BeNeLuX
 BNN Boundary Network Node
 BNR Binary
 BNS Basic Name Server
 BO Business Object
 BOC Bus Out Check
 BOC Binary Offset Carrier
 BOH Brussels Olno High
 BOI Biographical Oriented Interview
 BOL Brussels Olno Low
 BOMB BOMBing
 BOOST Building Object Oriented Software Technology
 BOP Budget opérationnel de programme
 BOS Behaviour anchored Rating Scales
 BP Best Practices
 BP Business Plan
 Page 68
 EUROCONTROL AIRIAL
 Acronym Full form
 BP British Petroleum
 BPA Barometric Pressure Altitude
 BPE Boundary Point of Entry
 BPF Band Pass Filter
 BPG Boundary Point Geographical
 BPI Bits Per Inch
 BPL Boundary Point Lateral
 BPM Business Process Management
 BPN Boundary Point of eNtry (local route)
 BPR Business Processes Review
 BPS Barometric Pressure Setting
 bps Bits per second
 BPS Boundary Point Sector
 BPS Business Planning & Support
 BPS BD Business Planning & Support Business Division (EUROCONTROL)
 BPSK Binary Phase Shift Keying
 BPSX Boundary Point Sector Exit
 BPX Boundary Point of eXit
 BPXA Boundary Point of eXit Aerodrome of destination (Linked)
 BPXF Boundary Point of eXit truncated route (T)
 BPXL Boundary Point of eXit Lateral
 BPXS Boundary Point of eXit Subjacent
 BR Mist
 BRA Basic Rate Access
 BRA Bearing, Range and Altitude
 BRADS Business Report Application Development System
 BRAIN Barcelona RNAV Approach Innovations
 BRAINS Baggage Routing and Information System
 BRE BREkendorf (Air Defence Station)
 BRF Short (describing type of approach required)
 BRG BeaRinG
 BRI Basic Rate Interface
 BRIA Bureau régional d'information et d'assistance au vol
 Brief Briefing
 Page 69
 EUROCONTROL AIRIAL
 Acronym Full form
 BRIGHT Intensify selected tracks in "OWN" sector
 BRITE Basic Rate access t-InTerface Extension
 BRITE Basic Research in Industrial Technologies for Europe = EURAM
 BRKG BRaKinG
 BRNAV Basic Area Navigation
 BRO BROckzetel (Air Defence Station)
 BRS Back-up Radio System
 BRT Beta-Release Transfer
 BRT CON Brightness Controll (N-FDPS)
 BRU BRUssels sectors
 BS BackSpace
 BS British Standard
 BS Band Stop (ACS)
 BS BootStrap (RADNET Introduction - MAS)
 BS Broadcasting Station (commercial)
 BS Basic Strip(s)
 BS1 Incomplete Basic Strip (1) Plan
 BSA-ANS Belgian Supervisory Authority for Air Navigation Services
 BSAM Basic Sequential Access Method
 BSAP Broadcast Service Access Point
 BSC Basic Services Component
 BSC Balanced Scorecard
 BSC Binary Synchronous Communications
 BSCM Bosnian-Serbian-Croatian-Montenegrin (interpretation booth)
 BSCU Brake and Steering Control Unit
 BSD Berkeley Software Distribution
 BSD Barco Synoptic Displays, (TWS)
 BSI British Standards Institute
 BSM Basic Storage Module
 BSN BDU Sequence Number
 BSP Business Systems Planning
 BSS Basic System Software
 BSS Broadband Swicthing Systems
 BSS Best Signal Selection (ODS)
 Page 70
 EUROCONTROL AIRIAL
 Acronym Full form
 BSS Broadcast Satellite Services
 BSU Beam Steering Unit
 BT British Telecom
 BT Business Trajectory
 BT Bandwidth Time
 BTAM Basic Telecommunications Access Method
 BTC Business TeleCommunications
 BTC Basic Training Course
 BTDC Before Top Dead Centre
 BTE Bi-directional Transceiver Element
 BTEC Business and Technician Education Council
 BTH (R) Beyond the Horizon (Radar)
 BTIV Bureau de transmission des informations en vol
 BTL BeTween Layers
 BTN BeTweeN
 BTO Block Time Overshoot
 BTS Back-up Telephone System
 BTS Batch Terminal Simulator
 BTV Brake to Vacate
 BUG Bertem (Radar) User's Group
 BUL-ROM Bulgaria/Romania FAB (Danube FAB)
 BULATSA Bulgarian Air Traffic Services Authority
 BUP Backup
 BVCS Backup Voice Communication System
 BVLOS Beyond Visual Line of Sight
 BVR Beyond Visual Range
 BW Bandwidth
 BWB Blended Wing Body
 BWH Brussels West High
 BWP Budget and Work Programme Planning / Planification du Budget et du programme de travail
 BY Belarus (ISO Country Code)
 BZ billing zone/zone de facturation
 C Programming Language
 c Speed of Light in free space (+/-300,000 metres per second)
 Page 71
 EUROCONTROL AIRIAL
 Acronym Full form
 C Current sector (N-FDPS)
 C Band Frequency Band
 C Programming Language
 C Centre (runway ID)
 C Degrees Centigrade (Celsius) (°C)
 C Consumables
 C Confirm
 C & M Control and Monitoring
 C&P Crossing & Passing
 C- Programming Language
 C-ATM Cooperative Air Traffic Management (ATM coopératif)
 C-ATSU Controlling ATS Unit
 C-band C-Band (radar frequency band)
 C-Channel Circuit Mode Channel
 C-DPI Cancel - DPI
 C-DPI Cancel-Departure Planning Information
 C-Gate Cancel Gate (DEVD)
 C-GATE Cancel Gate
 C-SAS Cranfield Situation Awareness Scale
 C/A Coarse/Acquisition Code
 C/A Code Course / Acquisition Code
 C/AFT CNS/ATM Focused Team
 C/d Capacity demand ratio
 C/M Carrier-to Multi-Path Ratio
 C/N Carrier to Noise Ratio
 C/N0 Carrier-to-Noise-Density Ratio
 C/R Command/Response bit
 C/S CallSign (of aircraft)
 c/s Cycles per Second (= Hertz = Hz)
 C1 Radio Navigation Satellite Services Frequency (5010-5030 MHz)
 C102(TSO) Helicopter Radar Approach, Issued 04/02/84 (RTCA DO-172, Issued 03/83)
 C104(TSO) Microwave Landing System (MLS) Receiving Equipment, Issued 06/82 (RTCA DO-174, Issued 03/82)
 C105(TSO) Optional Display For Weather Radar, Issued 06/84 (RTCA DO-174, Issued 03/81)
 C110(TSO) Airborne Thunderstorm Detector, Issued 01/01/01,(RTCA DO-187, Issued 11/84
 Page 72
 EUROCONTROL AIRIAL
 Acronym Full form
 C115(TSO) RNAV Equipment Using Multi_Sensor, Issued 06/86 (RTCA DO-187, Issued 11/84)
 C118(TSO) Airborne TCAS I Equipmen4 Issued 08/88 (RTCA DO-197, Issued 3/87)
 C119(TSO) Airborne TCAS II Equipment (RTCA DO-185, Issued 09/83)
 C120(TSO) RNAV Equipment Using OMEGA/VLF, Issued 01/88 (RTCA DO-185 issued 9/83)
 C2 Command and Control
 C2 Level Security Level in the United States Department of Defense
 C2-SPI Pulse Position C2 - Special Position Indicator (SPI) pulse phantom
 C3 Command, Control and Communications
 C31d(TSO) High Frequency (HF) Communications Transmitting Equipment, Issued 04/84 (RTCA DO-163, Issued 03/76)
 C32d(TSO) High Frequency (HF) Communications Receiving Equipment, Issued /83
 C34e(TSO) ILS Glide Slope Receive Equipment, Issued 01/88 (RCTA DO-192, Issued 07/86)
 C35d(TSO) Radio Marker Receiving Equipment, Issued 04/71 (RTCA DO-143, Issued 01/70)
 C36e(TSO) ILS Localizer Receiver Equipment, Issued 01/88 (RTCA) DO-195, Issued 11/86)
 C37d(TSO) VHF Comm transmitting Equipment, Issued 08181 (RTCA DO-157, Issued 08/81(RTCA DO_157, Issued
 08/74)
 C38c(TSO) VHF Comm Receiving Equipment; Issued 08/81 (RTCA DO-156, Issued 08/74)
 C38d(TSO) Receiving Equipment, Issued 08/81 (RTCA DO_186, Issued 1/84)
 C3CM(TSO) Command, Control and Communications Countermeasures
 C3I Command, Control, Communications and Intelligence (network)
 C3T Controller Tools and Transition Trials. See EVP.
 C40c(TSO) Airborne VOR Receiving Equipment, Issued 01/88 (RTCA DO-1996, Issued 11/86)
 C41d(TSO) Airborne ADF Equipment, Issued 05/86 (RTCA DO-179, Issued 05/82)
 C4I Command, Control, Communications, Computers and Intelligence
 C50c(TSO) Audio Selector Panel and Amps, Issued 01/83 (RTCA DO-170, Issued 01/80)
 C57a(TSO) Headsets And Speakers, Issued 01/83 (RTCA DO-170, Issued 01/80)
 C58a Aircraft Microphones, Issued 01/83 (RTCA DO-170, Issued 01/80)
 C59 Selective Calling (SELCAL) Equipment, Issued 01/01 (RTCA DO-93, Issued 2/59)
 C60b RNAV Equipment Using LORAN -C, Issued 05/88 (RTCA DO-194, Issued 11/86)
 C63c Airborne Weather Radar, Issued 08/83 (RTCA DO-173 Issued 11/80)
 C65a Doppler Radar Air Speed Equipment, Issued 08/83 (RTCA DO-158, Issued 11/75)
 C66b Airborne DME (Distance Measuring Equipment), Issued 08/81 (RTCA DO-1514, Issued 04/60)
 C67 Airborne Radar Altimeters, Issued 11/64 (RTCA DO-103, Issued 4/60)
 C68a Dead Reckoning Computer Equipment, Issued 08/83 (RTCA DO-158, Issued 10/75)
 C74e Airborne ATC Transponder Equipment, Issued 01/01 (RTCA DO 161A, Issued 05/76)
 Page 73
 EUROCONTROL AIRIAL
 Acronym Full form
 C87a Low Range Radar Altimeters, Issued 01/01 (RTCA DO-155, Issued 01/74)
 C91a Emergency Locator Transmitter, Issued 04/85 (RTCA DO-183, Issued 5/83)
 C92b Ground Proximity Warning (GPWS) Equipment, 01/01 (RTCA DO-161A, Issued 05/76)
 C94a OMEGA Receiving Equipment, Issued 08/81 (RTCA DO-164A, Issued 09/79)
 CA Count Area
 CA CApability (-control bit)
 CA Conflict Alert
 CA Computer Associates
 CA Capability
 CA Command Area
 CA Circulation aérienne
 CA Certificate of Airworthiness
 CA Course to an Altitude (ARINC 424 Path Terminator)
 CA Competent Authority (autorité compétente - AC)
 CA Civil Aviation
 CAA Civil Aviation Authority (autorité/administration de l'aviation civile - AAC)
 CAA Computer Aided Analysis
 CAAC Civil Aviation Authority - China
 CAAI Civil Aviation Authority of Israel
 CAAS Common AMHS Addressing Scheme
 CAAS Common Aeronautical Address Form
 CAAS Civil Aviation Authority of Singapore
 CAAS Computer Aided Approach Sequencing
 CAASD Centre for Advanced Aviation System Development
 CAATS Canadian Automated Air Traffic System
 CAATS Cooperative Approach to Air Traffic Services
 CAB-E Change Approval Board - Eng.
 CAB-O Change Advisory Board - Operations
 CAC Centralised Approach Control
 CAC Common Acceptance Criteria
 CAC Coastal Assistant Controller
 CAC Connection Admission Control
 CACD Central Airspace and Capacity Database
 CAD Computer Aided / Assisted Design
 Page 74
 EUROCONTROL AIRIAL
 Acronym Full form
 CAD/CAM Computer Aided Design / Computer Aided Manufacturing
 CADAS Computer-controlled Avionics Data Acquisition System
 CADD Computer Aided Draughting & Design
 CADF Centralised Airspace Data Function (ECAC) (Fonction de centralisation des données concernant l'espace
 aérien de la CEAC)
 CADIN Czech Automated Data Interchange Network
 CADS Combined Arrival and Departure Sequencing/Study (APATSI)
 CADS Centralised ADS
 CADsim Computer Aided Design for Simulations
 CAE Computer Aided Engineering
 CAEP Committee on Aviation Environmental Protection (Comité de la protection de l'environnement en aviation)
 CAER Computer Assistance for En-Route ATC
 CAERAF Common American-European Reference ATN Facility / Dispositif ATN de Référence commun pour les Etats-
 Unis et l'Europe
 CAF/LOC Certificat d'aptitude à la fonction/position de contrôle local
 CAFA Causal Factor Analyses Group
 CAFAC Commission Africaine de l'Aviation Civile (African Civil Aviation Commission, AFCAC)
 CAFE Conventional Armed Forces in Europe
 CAFO Committee on Air traffic management and Flight Operations
 CAFÉ Collision Avoidance Fast time Evaluator
 CAG Circulation aérienne générale (General Air Traffic (GAT))
 CAGR compound annual growth rate
 CAI Computer Assisted Input
 CAI Contractor Acceptance and Inspection
 CAI Civil Aviation Inspection
 CAI Computer Assisted Instruction
 CAI Cooperative Airspace Initiative
 CAIA Collaborative Airline Interface(Interface conjointe des compagnies aériennes)
 CAIIS Computer Aided Imagery Interpretation System
 CAIM Craft Autonomous Integrity Monitoring
 CAIR Confidential Aviation Incident Reporting
 CAIRDE Civil Aviation Integrated Radar Display Equipment (IRE)
 CAL Code Allocation List
 CAL Computer Aided Learning
 CAL Computer Aided Logistics
 Page 75
 EUROCONTROL AIRIAL
 Acronym Full form
 CALLSGN Callsign
 CALM Computer Assisted Landing Management System
 CALS Computer-aided Acquisition and Logistic Support
 CAM Conflict Alert Message (MADAP)
 CAM Circulation Aérienne Militaire (FR)
 CAM Computer Aided Manufacturing
 CAM Code Allocation Message
 CAM Cost Allocation Methodology
 CAM Control And Monitoring
 CAMACA Commonly Agreed Methodology for Airport Airside Capacity Assessment
 CAMAR Conflict Alert Message Analysis and Reporting
 CAMC Conflict Alert Message Collection
 CAMC Canadian Aviation Maintenance Council
 CAMES Cooperative ATM Measures for a European Single Sky (Mesures de coopération ATM pour un ciel européen
 unique)
 CAMI Civil Aeromedical Institute
 CAMOS Centralised ARTAS Maintenance & Operational Support (appui centralisé à l'exploitation et à la maintenance
 de l'ARTAS)
 CAMPS Computer Aided Message Processing System
 CAMU Central Airspace Management Unit (South Africa)
 CAMUS Czech Automated Multi radar System
 CAN CANcel
 CAN Contract Award Notice
 CAN Committee on Aircraft Noise
 CAN Proj. Croatian Air Navigation Project
 CANAC Computer Assisted National ATC Centre (B)
 CANSO Civil Air Navigation Services Organisation
 CAO Computer Assisted Operations
 CAO Civil Aviation Office (Poland)
 CAO Collaboration with Airport Operations
 CAOC Combined Air Operations Centre
 CAOFA Coordination of Air Operations in the Forward Area
 CAP Combat Air Patrol
 CAP Controller Access Protocol
 CAP CAPacitor
 Page 76
 EUROCONTROL AIRIAL
 Acronym Full form
 CAP Computer Aided Production
 CAP Corrective Action Plan
 CAP Cost Allocation Principle
 CAP Common ATM Plan (Plan ATM commun)
 CAP Code Allocation Plan
 CAP Capacity
 CAP Comité administratif paritaire
 CAP Civil Aviation Publication (UK CAA)
 CAP Controller Access Parameters
 CAPA CEATS ANS Providers Association
 CAPAN Capacity Analyser
 CAPC Civil Aviation Planning Committee (NATO)
 CAPE Computer Assisted Planning Experiment
 CAPEX Capital Expenditure (Dépenses en capital)
 CAPIG CEATS Airspace Planning and Implementation Group
 CaPlan TF Capacity Planning Task Force
 CAPOC Pensions Administrative Committee of the Coordinated Organisations (Comité d'Administration des pensions
 des Organisations Coordonnées)
 CAPOI Conférence annuelle des associations du personnel des organisations internationales (Conference of Staff
 Associations of International Organisations - CSAIO)
 CAPP Client Applications Section (previously DEVD) (Section « Applications clients »)
 CAPPI Constant Altitude Plan Position Indicator
 CAPRI Core Applications Production Infrastructure
 CAPS CEATS ANS Providers Support
 CAPSIN Civil Aviation Packet Switching Integrated Network (UK)
 CAPST Cooperative Area Precision Tracking System
 CAPT Coverage Analysis and Planning Tool
 CAQC Computer Aided Quality Control
 CAR Caribbean Region
 CAR Central Access Routing
 CAR Committed Access Rate
 CARA Collaborative Arrival Regulation Avoidance
 CARA Controller Action Reliability Assessment
 CARAT Computer-Aided Route Allocation Tool (Aide informatisée à l'attribution de routes)
 CARATS Collaborative Actions for Renovation of Air Traffic Systems
 Page 77
 EUROCONTROL AIRIAL
 Acronym Full form
 CARD CNS Applications - Research and Development
 CARD Conflict And Risk Display (ODID)
 CARD CNS/ATM Research and Development
 CARDS Community Assistance for Reconstruction, Development and Stabilisation (Assistance communautaire pour la
 reconstruction, le développement et la stabilisation)
 CARE Cooperative Actions of R&D in EUROCONTROL (Actions coopératives de recherche et développement à
 EUROCONTROL)
 CARF Central Altitude Reservation Function
 CARFE Conference on Airport and Route Facility Economics (ICAO) / Conference sur la gestion des aéroports et des
 installations et services de route
 CARP Computed Air Release Point
 CARS Controller Acceptance Rating Scale
 CART Competency Assessment and Refresher Training
 CART Classification And Regression Trees
 CAS Collision Avoidance System
 CAS Channel Associated Signalling
 CAS Control Augmentation System
 CAS Comprehensive Agreement State
 CAS Calibrated Air Speed
 CAS Compte d'affectation spécial
 CAS Computerised Assessment System
 CAS Close Air Support
 CASA Computer-Assisted Slot Allocation (Allocation de créneaux assistée par ordinateur)
 CASA Civil Aviation Safety Authority of Australia
 CASCADE Cooperative ATS through Surveillance and Communications Applications Deployed in ECAC
 CASE Computer-Aided Software Engineering
 CASE Computer Aided Software Engineering
 Case Case Study
 CASE Computer Aided System Engineering
 CASI Aircraft Situation Image
 CASOR Civil Area Services Operations Room
 CASP Common AIS Staff Profiling
 CASSIS CTA ATM System Integration Studies (Project)
 CASSY Cockpit Assistant System
 CAST Comprehensive Airport Simulation Tool
 Page 78
 EUROCONTROL AIRIAL
 Acronym Full form
 CAST Commercial Aviation Safety Team
 CAST Consequences of future ATM systems for air traffic controller Selection and Training
 CAST Centre of Aviation Safety Technology (Civil Aviation Authority of China)
 CAST Computer-Aided Software Testing
 CASTA Controller Associate for Strategic and Technical Advice
 CASTAR Computer Aided Synchronisation Tool for Airspace Repository
 CAT Computer Assisted Teaching / Training
 CAT Continuous Attention Task
 CAT Commercial Air Transport
 CAT Clear Air Turbulence
 CAT Category
 CAT Capacity Assessment Team
 CAT Data Category
 CAT I ILS Category I Instrument Landing System
 CAT x Category x Precision Approach (I , II or III)
 CAT-1 Category One
 CAT001 ASTERIX Category 001
 CAT002 ASTERIX Category 002
 CAT003 ASTERIX Category 003
 CAT004 ASTERIX Category 004
 CAT008 ASTERIX Category 008
 CAT009 ASTERIX Category 009
 CAT010 ASTERIX Category 010
 CAT011 ASTERIX Category 011
 CAT017 ASTERIX Category 017
 CAT018 ASTERIX Category 018
 CAT019 ASTERIX Category 019
 CAT020 ASTERIX Category 020
 CAT021 ASTERIX Category 021
 CAT022 ASTERIX Category 022
 CAT023 ASTERIX Category 023
 CAT030 ASTERIX Category 030
 CAT031 ASTERIX Category 031
 CAT032 ASTERIX Category 032
 Page 79
 EUROCONTROL AIRIAL
 Acronym Full form
 CAT033 ASTERIX Category 033
 CAT034 ASTERIX Category 034
 CAT048 ASTERIX Category 048
 CAT061 ASTERIX Category 061
 CAT062 ASTERIX Category 062
 CAT063 ASTERIX Category 063
 CAT065 ASTERIX Category 065
 CAT128 ASTERIX Category 128
 CAT150 ASTERIX Category 150
 CAT151 ASTERIX Category 151
 CAT152 ASTERIX Category 152
 CAT153 ASTERIX Category 153
 CAT241 ASTERIX Category 241
 CAT242 ASTERIX Category 242
 CAT244 ASTERIX Category 244
 CAT251 ASTERIX Category 251
 CAT252 ASTERIX Category 252
 CAT253 ASTERIX Category 253
 CAT254 ASTERIX Category 254
 CAT255 ASTERIX Category 255
 CATCAS Copenhagen ATC Automated System
 CATCAS Copenhagen Air Traffic Control Automated System (DK)
 CATCO Chief ATC Operations
 CATF Conformity Assessment Task Force (Équipe spéciale sur l'évaluation de la conformité)
 CATIA TF on CNS/ATM Implementation Aspects
 CATIA Computer graphics Aided Three dimensional Interactive Applications
 CATMAC Cooperative Air Traffic MAnagement Concept
 CATMT Collaborative Air Traffic Management Technology
 CATO Civil Air Traffic Operations
 CATS Contract-based Air Transportation System
 CATS Data Categories (ASTERIX)
 CATSA Croatian air Traffic Services Authority
 CATSIM CAA Air Traffic Simulator (UK)
 CATV Community Antenna TeleVision
 Page 80
 EUROCONTROL AIRIAL
 Acronym Full form
 CAUC Civil Aviation University of China
 CAUSE Collision Avoidance Requirements for UAS
 CAUTRA Coordinateur AUtomatique de TRafic Aérien (Automated Computer System for Air Traffic)
 CAV Constant Angular Velocity
 CAVA Concerted Action on Validation of ATM Systems
 CAVEAT Collision Avoidance Validation and Evaluation Tool
 CAVOK Clouds and Visibility OK
 CAW Channel Address Word
 Cb Cumulonimbus
 CB Central Battery
 CBA Cross-Border Area (Zone de ségrégation temporaire transfrontalière)
 CBA Cost-Benefit Analysis (Analyse coûts-avantages)
 CBAS Competence-Based Assessment System (système d'évaluation basé sur les compétences)
 CBCZ Cross Border Charging Zone
 CBD Component Based Development
 CBDS Circuit Board Design System
 CBE Computer Based Education
 CBE/T Computer Based Education/Training
 CBI Computer Based Instruction
 CBIPO Custom Built Installation Processing Offering
 CBL Calculated Boundary Level (N-FDPS)
 CBM Core Business Manager (Gestionnaire "Activités principales")
 CBN Common Backbone Network (subnetwork RAPNET = system of the national ATS, DFS = PSN)
 CBO Cross-Border Operations (Exploitation transfrontalière)
 CBPDO Custom Built Product Delivery Offering
 CBPE Computer-Based Practical Exercises
 CBPM Computer-Based Performance Measure
 CBQ Class Based Queuing
 CBR Constant Bit Rate
 CBS Cost Breakdown Structure
 CBS Cost/Benefit Studies
 CBT Computer Based Training / Formation assistée par Ordinateur
 CBT Computer Based Tool
 CBU Core Business Unit (Unité "Activités principales")
 Page 81
 EUROCONTROL AIRIAL
 Acronym Full form
 CBX Computerised Branch eXchange
 CC Cluster Controller
 CC Common Control unit
 CC Connection Confirm
 CC Coordinator Controller
 CC UK Competition Commission
 CC Clearing Cause
 CC Call Control
 CC Client Code
 CC Contextual Condition
 CC Change Control
 CC Cirro-Cumulus
 CC0 Congestion Control Level 0
 CC1 Congestion Control Level 1
 CC2 Congestion Control Level 2
 CC3 Congestion Control Level 3
 CCA Common Cause Analysis
 CCA Channel Control Array
 CCAMS Centralised (SSR) Code Assignment and Management System (Système centralisé de gestion et
 d'assignation des codes SSR)
 CCB Change Control Board
 CCB Configuration Control Board
 CCBS Call Completion to Busy Subscribers
 CCC Committee on Climate Change (comité sur le changement climatique) (UK)
 CCC Coastal Coordinating Controller
 CCC Cellular CNS Concept
 CCC Central Computer Complex
 CCC Common Core Content (of ATC Training)
 CCC Command, Control and Communications
 CCCB Configuration Change Control Board
 CCCC Cross Channel Coordination Centre
 CCCI Command, Control, Communications and Intelligence (network)
 CCD Charge Coupled Device
 CCD Continuous Climb Departures
 Page 82
 EUROCONTROL AIRIAL
 Acronym Full form
 CCDS Code Callsign Distribution Systems
 CCE Commission des Communautés européennes ; Commission européenne (FR) / Commission of the European
 Communities (=CEC) ; European Commission (EC)
 CCESC CEATS Chief Executive Standing Conference
 CCF Centralised Control Function (LATCC)
 CCF Central Control Facility (EGNOS)
 CCFG Computer & Communications Facilities Group
 CCFP Collaborative Convective Forecast Product
 CCFS Communication/ACAS Capability and Flight Satus
 CCFT Cold Cathode Fluorescent Tube
 CCG CEATS Coordination Group (Groupe de coordination CEATS)
 CCI Co-Channel Interference
 CCIA Computer & Communications Industry Association
 CCIP Code-Callsign Input Position (MADAP)
 CCIR Comité Consultatif International des Radiocommunications - International Radio Consultative Committee (now
 ITU-R)
 CCIS Closed Circuit Information System
 CCITT Comité Consultatif International Télégraphique et Téléphonique (UIT) - International Telegraph and
 Telephone Consultative Committee (ITU)
 CCL Code Callsign List
 CCL Crossing Climb
 CCL Computation Cycle Loop
 CCL Croatia Control Ltd.
 CCL Compliance Check List (Liste de contrôle de conformité)
 CCM CASA Cancellation Message
 CCM Computerised Control and Monitoring
 CCM Configuration Control Manager
 CCM Centre de Contrôle Militaire / Military Control Centre (=MCC)
 CCM Corporate Conceptual Model
 CCMAV Commission consultative des marchés d'achat et de vente (Advisory Committee on Procurement and Sales
 Contracts)
 CCMG CEATS Civil/Military Group
 CCMS Committee on the Challenges of Modern Society (NATO)
 CCN Contract Change Note
 CCNR Call Completion on No Reply
 CCO Continuous Climb Operations
 Page 83
 EUROCONTROL AIRIAL
 Acronym Full form
 CCP Congé de convenance personnelle (leave on personal grounds)
 CCP Comité central du personnel (Central Staff Committee - CSC)
 CCP Configuration Control Plan
 CCP Code Callsign Printout
 CCP Comité central du personnel (Central Staff Committee - CSC)
 CCP Comité central du personnel (Central Staff Committee - CSC)
 CCP Contract Change Proposal
 CCP Circuit Switched Public Data Network
 CCPP Central Committee for Prevention and Protection at work (comité central de prévention et de protection au
 travail)
 CCPP Central Committee for Prevention and Protection at work (comité central de prévention et de protection au
 travail)
 CCPUG Change Control Procedure (ref. STD-CM/PRO/CCPUG)
 CCR Cancel Contract Request
 CCR ConCurrency and Recovery
 CCR Commitment Concurrency and Recovery
 CCR centre de contrôle régional (Area Control Centre - ACC)
 CCS Common Channel Signalling
 CCS Change CallSign message
 CCS Cabin Communications Systems
 CCS Code CallSign
 CCs Contractual Conditions
 ccs Hundred Call Seconds (= 1 Erlang)
 CCT Communications Coordination Team, (EATCHIP)
 CCT Code Callsign Table
 CCTV Closed Circuit Television
 CCU Cartridge Control Unit
 CCW Counter-Clockwise
 CCW Channel Command Word
 CCWG Customer Consultation Working Group
 CD Collision Detection
 CD Council Directive
 CD Course to a DME Distance (ARINC 424 Path Terminator)
 CD Call Deflection
 CD Compact Disc
 Page 84
 EUROCONTROL AIRIAL
 Acronym Full form
 CD CanDela
 CD Conflict Display (ODID)
 CD&A Conflict Detection and Avoidance
 CD-2 Transmission format for radar data
 CD-I Compact Disc Interactive
 CD-ROM Compact Disk / Read Only Memory
 CD2 Common Digitizer 2
 CDA CoorDination Acceptance (message)
 CDA Continuous Descent Approach (Approche en descente continue)
 CDA Current Data Authority (ICAO)
 CDA Conflict Display Area. Coordination Approval / CoorDination Acceptance (message)
 CDA Client Defined Area
 CDA Continuous Descent Arrival (ICAO)
 CDB Central Data Bank (former DBE)
 CDB Central Data Base
 CDC Consistent Datastore Copy
 CDC Centre de Détection et de Contrôle
 CDE Chef d'équipe
 CDE Crossing Descent
 CDFA Continuous Descent Final Approach
 CDG Charles De Gaulle (Paris North Airport)
 CDG Core Drafting Group (Selection)
 CDG Console Design Group
 CDGPS Canadian Differential GPS
 CDI Course Deviation Indicator
 CDI Coordination Information
 CDL Configuration Deviation List
 CDM Concert Data Manager
 CDM Code Division Multiplexing
 CDM Cooperative Decision-Making (NM processes)
 CDM Collaborative Decision-Making (prise de décision en collaboration)
 CDM-A Collaborative Decision-Making - Airports
 CDMA Code Division Multiple Access
 CDMS Corporate Document Management System
 Page 85
 EUROCONTROL AIRIAL
 Acronym Full form
 CDN Airspace Crossing Coordination Message
 CDN CoorDinatioN (message type designator)
 CDN Coordination Message
 CDO Continuous Descent Operations
 CDP Computer Diagnostics Program
 CDP Central Data Processing
 CDPS Central Data Processing System (Système central de traitement des données)
 CDQ Chef de quart
 CDR Coded Departure Routes (US)
 CDR Coordination Request (message)
 CDR Conditional Route (Route conditionnelle)
 CDR Call Detail Recording
 CDR Critical Design Review
 CDR Conflict Detection and Resolution
 CDR1 Conditional Route category 1 - Permanently plannable CDR during times published in national AIPs
 CDR2 Conditional Route category 2 - Non-Permanently Plannable
 CDRL Contracts Data Requirements List (MAS/DFS - ODS)
 CDRL Contractual Deliverable Requirement List -
 CDS Controller Display Support
 CDS Chef de salle
 CDSE Confirmed Data Service Element
 CDSEPT Committee to Develop Standards for Educational and Psychological Testing of The American Educational
 research Association, The American Psychological Association, and The National Council on Measurement in
 Education.
 CDT Chef de tour
 CDT Command Delivery Time
 CDTF CASCADE Deployment Task Force
 CDTI Cockpit Display of Traffic Information
 CDTS Console Detailed Technical Specification
 CDU Control Display Unit
 CDV Cell Delay Variation
 CDVT Cell Delay Variation Tolerance
 CE Clearance Expires at...
 CE Committee of Management (Comité de gestion)
 CE Congestion Experienced
 Page 86
 EUROCONTROL AIRIAL
 Acronym Full form
 CE Clean Earth (Electrical connection)
 CE Commission européenne (European Commission - EC)
 CE Conformity European
 CE-GPS Complément européen au GPS / European GPS Overlay
 CE/R enlarged Committee for Route Charges (Comité élargi pour les redevances de route)
 CE/R/MET/TF Task Force on the allocation of MET costs to civil aviation users (Équipe spéciale sur l'imputation des coûts
 "MET" aux usagers de l'aviation civile)
 CEA Centre for the Evaluation of nuclear protection
 CEAC Conférence européenne de l'aviation civile (European Civil Aviation Conference - ECAC)
 CEAC Committee for European Airspace Coordination (NATO Group) renamed on 27.4.98 by the North Atlantic
 Council (=NATMC)
 CEANS Conference on the Economics of Airports and Air Navigation Services - Conférence sur l'economie des
 aérports et des services de navigation aérienne
 CEATS Central European Air Traffic Services
 CEATS FSG Central Europe ATS Financial Sub-Group
 CEATS LSG Central Europe ATS Legal Sub-Group
 CEATS UAC Central European Air Traffic Services Upper Airspace Control Centre
 CEATS WGMI CEATS Working Group on Management Issues
 CEC Commission of the European Communities ; European Commission / Commission des Communautés
 Européennes (=CCE) ; Commission européenne (FR)
 CEC Coastal Executive Controller
 CECUA Conference of European Computer Users Associations
 CEDAR Critical Event Detection and Reporting (consortium)
 CEDRe Centre d'exploitation, de développement et d'études du réseau d'information de gestion
 CEE Communauté Economique Européenne
 CEE Centre expérimental d'EUROCONTROL (EUROCONTROL Experimental Centre (EEC))
 CEECs Countries of Central and Eastern Europe ; Central and Eastern Europe Countries / Pays d'Europe centrale et
 orientale (=PECO)
 CEF Contrast Enhancement Filter
 CEF Connecting Europe Facility
 CEF Capacity Enhancement Function (Fonction de renforcement de la capacité)
 CEFA CRCO Extranet For Airspace users - (Extranet du SCRR pour les usagers de l'espace aérien)
 CEFA Cooperation for Environmentally Friendly Aviation (ERA, ACI, AEA, AECMA, EBAA, EUROCAE)
 CEFR CDTI Enhanced Flight Rules
 CEG Chief Executive Group (Groupe des Administrateurs généraux)
 CEG Continuous Edge Graphic
 Page 87
 EUROCONTROL AIRIAL
 Acronym Full form
 CEG CESC Executive Group (Groupe de direction de la CESC)
 CEI Commission électrotechnique internationale / International Electrotechnical Commission (=IEC)
 CELI Congressional Economic Leadership Institute
 CELP Code Excited Linear Prediction
 CEM Collaborative Environmental Management / gestion concertée de l'environnement
 CEM Capacity Enhancement Manager (Gestionnaire du renforcement de la capacité)
 CEMA Chef d'Etat-Major de l'Armée (FR)
 CEMT Conférence Européenne des Ministres des Transports / European Conference of Ministers of Transport
 (ECMT)
 CEN Certificat d'Examen de Navigabilité
 CEN Comité Européen de Normalisation / European Committee for Standardization
 CENA Centre d'études de la navigation aérienne (French air navigation study centre) (DGAC/DNA)
 CENELEC European Committee for Electrotechnical Standardization (Comité européen de normalisation
 électrotechnique)
 CENTRA Tool used for teleconferencing and e-learning
 CEO Chief Executive Officer
 CEP Circular Error Probability
 CEPT Conference Europeenne des Postes et Telecommunications
 CER Cancel Emergency Mode Request
 CER Cell Error Ratio
 CERAN Central European suRveillAnce Network
 CERCO Comité Européen des Responsables de la Cartographie Officielle
 CERG Central European Rotation Group (ICAO group)
 CERN Conseil Européen pour la Recherche Nucléaire
 CERT Computer Emergency Response Team
 CES Circuit Emulation Service
 CES Capacity Enhancement Service (ATFM)
 CES Central and Eastern European States
 CESAR Course Evaluation Sheets Analysis and Reporting
 CESC Chief Executive Standing Conference (Conférence permanente des Présidents des Comités de direction)
 CESNAC Centre d'Exploitation des Systèmes de la Navigation Aérienne Centraux (FR)
 CEST Central European Standard
 CESTOL cruise-efficient short-take off and landing transports
 CET Central European Time
 CET Compte épargne-temps (Leave Savings Account)
 Page 88
 EUROCONTROL AIRIAL
 Acronym Full form
 CETCOPRA Centre d'Etudes des Techniques, des Connaissances et des Pratiques - Univ. Paris I
 CEU Central Executive Unit (Organe exécutif central, OEC) - old name, see OPSD
 CEV Centre d'essais en vol = Flight Testing Centre
 CEW Civil Engineering Works
 CF Control Functions
 CF Classification and Filtering
 CF Control Function
 CF Course to a Fix (ARINC 424 Path Terminator)
 CF Control Field
 CF Directorate Central Route Charges Office and Finance (direction "Service central des redevances de route et
 Finances")
 CF Change Frequency to...
 CF Coordination Function
 cf Refer To...(from latin ConFero)
 CF/AFS Directorate Central Route Charges Office and Finance/Agency Finance Services (direction "Service central
 des redevances de route et Finances"/services financiers de l¿Agence)
 CF/AFS/ATT Directorate Central Route Charges Office and Finance/Agency Finance Services/Accounting & Treasury Unit
 (direction "Service central des redevances de route et Finances"/services financiers de l¿Agence/unité
 "Comptabilité et trésorerie")
 CF/AFS/FPC Directorate Central Route Charges Office and Finance/Agency Finance Services/Financial Planning & Control
 Unit (direction "Service central des redevances de route et Finances"/services financiers de l¿Agence/unité
 "Planification et contrôle financiers")
 CF/AFS/PAR Directorate Central Route Charges Office and Finance/Agency Finance Services/Procurement & Agreements
 Unit (direction "Service central des redevances de route et Finances"/services financiers de l¿Agence/unité
 "Achats et accords")
 CF/CRCO Directorate Central Route Charges Office and Finance/Central Route Charges Office (direction "Service
 central des redevances de route et Finances"/Service central des redevances de route - CF/SCRR)
 CF/CRCO/BCE Directorate Central Route Charges Office and Finance/Central Route Charges Office/Billing, Customer
 Relations & Economics Division (direction "Service central des redevances de route et Finances"/Service
 central des redevances de route/division "Facturation, relations avec la clientèle et aspects économiques" -
 CF/SCRR/BCE)
 CF/CRCO/CAT Directorate Central Route Charges Office and Finance/Central Route Charges Office/Collection, Accounting &
 Treasury Division (direction "Service central des redevances de route et Finances"/Service central des
 redevances de route/division "Recouvrement, comptabilité et trésorerie - CF/SCRR/CAT)
 CF/CRCO/CIS Directorate Central Route Charges Office and Finance/Central Route Charges Office/CRCO Information
 Services Unit (direction "Service central des redevances de route et Finances"/Service central des redevances
 de route/unité "Services d'information du SCRR" - CR/SCRR/CIS)
 CF/FEO Directorate Central Route Charges Office and Finance/Pension Fund Executive Officer (direction "Service
 central des redevances de route et Finances"/administrateur général du Fonds de pension)
 CF/OFF Directorate Central Route Charges Office and Finance/Office of the Director CF (direction "Service central des
 redevances de route et Finances"/bureau du directeur CF)
 Page 89
 EUROCONTROL AIRIAL
 Acronym Full form
 CF/QC Directorate Central Route Charges Office and Finance/Quality & Compliance Manager (direction "Service
 central des redevances de route et Finances"/gestionnaire de la qualité et de la conformité)
 CF/SCRR direction "Service central des redevances de route et Finances"/Service central des redevances de route
 (Directorate Central Route Charges Office and Finance/Central Route Charges Office - CF/CRCO)
 CF/SCRR/BCE direction "Service central des redevances de route et Finances"/Service central des redevances de
 route/division "Facturation, relations avec la clientèle et aspects économiques" (Directorate Central Route
 Charges Office and Finance/Central Route Charges Office/Billing, Customer Relations & Economics Division -
 CF/CRCO/BCE)
 CF/SCRR/CAT direction "Service central des redevances de route et Finances"/Service central des redevances de
 route/division « Recouvrement, comptabilité et trésorerie » (Directorate Central Route Charges Office and
 Finance/Central Route Charges Office/Collection, Accounting & Treasury Division CF/CRCO/CAT)
 CFA Crossed Field Amplifier
 CFAR Constant False Alarm Rate (Radar Systems)
 CFAR Constant False Alarm Rate
 CFB Central Flight plan Bank
 CFB Call Forwarding Busy
 CFC ChloroFluoroCarbon
 CFCF Central Flow Control Facility (US)
 CFD Change to Flight Data Message
 CFD Consistent Flight Data
 CFDS Central Flight Data Suite (PALLAS system)
 CFE Customer Furnished Equipment
 CFEOI Call For Expression Of Interest
 CFEP Communications Front-End Processor
 CFF Critical Flicker Frequency
 CFG CEATS Financial Group (Groupe financier CEATS)
 CFG Configuration
 CFI Directorate Central Route Charges Office, Finance and central IT (direction "Service central des redevances
 de route, Finances et Services informatiques centralisés")
 CFI Call For Interest (appel à manifestation d'intérêt)
 CFI Carbon Financial Instrument
 CFI Customer Furnished Inputs
 CFI Court of First Instance of the European Communities
 CFIT Controlled Flight into Terrain
 CFL Cleared Flight Level (Niveau de vol autorisé)
 CFM Configuration Manager
 CFM Confirm message (CRCO claims)
 Page 90
 EUROCONTROL AIRIAL
 Acronym Full form
 CFM Central Flow Management (Gestion centralisée des courants de trafic)
 CFMO Centralised Flow Management System
 CFMU Central Flow Management Unit (Organisme central de gestion des courants de trafic aérien) (NB - No longer
 used; now replaced by NMD)
 CFNR Call Forwarding No Reply
 CFPU Central Flow Processing Unit (in a State)
 CFPU Central Flight Processing Unit
 CFQ Class-based Fair Queuing
 CFR Code of Federal Rules (Collection of US laws)
 CFRS Concert Frame Relay Service
 CFSP Computerised flight plan service provider
 CFSPG Computer Flight Planning Service Providers Group
 CFT Call for Tender
 CFTPD Central File of Transponder Performance Data (ECC)
 CFU Call Forwarding Unconditional
 CFWG CEATS Financial Working Group
 CG13 Challenges of Growth 2013
 CG18 Challenges of Growth 2018
 CGA Clear and Graded Area
 CGA Colour Graphics Adapter
 CGCB Common Ground Communications in the Balkans
 CGE General Conditions of Employment governing servants at the EUROCONTROL Maastricht Centre (Conditions
 générales d'emploi des Agents du Centre EUROCONTROL à Maastricht)
 CGFSNE Comité de gestion du Fonds social pour le non-emploi (Unemployment Fund Management Committee
 (UFMC))
 CGL Circling Guidance Light(s)
 CGM Computer Graphics Metafile
 CGRAM Comité de gestion du régime d'assurance maladie (SIMC)
 CGRC Consultative Group on Route Charges
 CGS Communication Ground Segment
 cgs Centimetre Gram Second
 CGSO CEATS Group of Senior Officials (Groupe de hauts fonctionnaires des CEATS)
 CH SVC CHannel number
 CH CHannel
 CH Switzerland (ISO Country Code)
 Page 91
 EUROCONTROL AIRIAL
 Acronym Full form
 CHA Character
 CHAID Chi Square Automatic Interaction Detection
 CHAIN Controlled Harmonised Aeronautical Information Network
 CHAMAN Chaotic Situation Management
 CHAMP Collaborative and Harmonised ATCO Manpower Training
 Chap. Chapter
 CHASEIT Collabotative Harmonisation of Architecture, System Engineering and Integration Techniques (internal
 EUROCONTROL Agency)
 CHC Coastal High Coordinator controller
 CHE Coastal High Executive controller
 CHG Change Message (IFPS)
 CHG CHanGe or modification (Message type designator)
 CHI Computer-Human Interface
 CHIEF Project Switzerland (CH), Italy (IT), Spain (ES), France (FR)
 CHIF CHannel Interface Feature
 CHIRP Confidential human Factors Incident Reporting Programme
 CHK CHecK message
 CHK MIKE Check Stuck Microphone (N-FDPS)
 CHMI Collaboration Human Machine Interface
 CHoD Chief of Defence (chef d'état-major des armées)
 CHPID CHannel Path IDentifier
 CHRG CEATS Human Resources Group
 CI Continuous Improvement (EEC)
 CI Course to Intercept (ARINC 424 Path Terminator)
 CI Call Intrusion
 Ci CIrrus
 CI Configuration Item
 CIA Command Input Area
 CIA Change Impact Assessment
 CIAAIC Comisión de Investigación de Accidentes e Incidentes de Aviación Civil (Spanish Investigation Agency)
 CIADN Croatian Integrated Aeronautical Data Network
 CIAIAC Civil Aircraft Accident and Incident Investigation Commission / Comisión de Investigación de Accidentes e
 Incidentes de Aviación Civil(Spain)
 CIAM Collaboration Interface for Airspace Management
 CIAO Collaboration Interface for AO
 Page 92
 EUROCONTROL AIRIAL
 Acronym Full form
 CIBP CEATS Informal Budget Process
 CIC Clearance and Information Communications
 CIC Clearances and Information Communications
 CICL Call Intrusion Capability Level
 CICS Customer Information Control System
 CICT Convergence and Implementation Coordination Team (renaming of SICT)
 CID CWP Information Display (N-FDPS)
 CID Case Inspection Delay
 CID Computer Interface Device
 CID Controller IDentification
 CID Configuration Identification Document
 CIDIN Common ICAO Data Interchange Network (Réseau OACI commun d'échange de données)
 CIDR Classless Internet Domain Routing
 CIEL Common Interface Exchange Language
 CIF Common Interchange Format
 CIFLO Collaboration Interface for Flow Management Position
 CIGS Ceilings
 CILO Capacity Increase of Lower Airspace
 CIM Customer Information Management
 CIMACT Civil-Military ATM Coordination Tool
 CIMIC Civil-Military Interface Committee
 CIMIL Civil-Military Coordination
 CIMSEL Civil-Military SSR Environment Liaison Group (Groupe de liaison civil-militaire pour l'infrastructure SSR)
 CINCAT Capacity Increase through Computer Assistance Tools
 CINCENT Commander in Chief Central Europe
 CINDI Core IT Novel Development Infrastructure
 CINT Call Interception
 CINTIA Control of Inbound Trajectories of Individual Aircraft
 CIO Chief Information Officer
 CIO Conventional International Origin
 CIO Coastal Input Operator
 CIO Chief Information Officer
 CIP Cosine Implementation Phase
 CIP convergence and implementation plan
 Page 93
 EUROCONTROL AIRIAL
 Acronym Full form
 CIPD Convergence and Implementation Programme Document (Document "Programme de convergence et de
 réalisation") (now replaced by ESSIP (documents))
 CIPL Call Intrusion Protection Level
 CIPREC Conversational & Interactive PRoject Evaluation & Control
 CIPROG Cellule Inter-défense de PROGrammation
 CIR Committed Information Rate
 CIREN Collaboration Interface for Remote Environment Access
 CIREN CHMI for ENV Coordinators
 CIS Cooperative Independent Surveillance
 CIS Critical Incident Stress
 CIS Commonwealth of Independent States (States of former USSR) / Communauté des Etats indépendants
 (=CEI)
 CIS Communication and Information Systems
 CISC Conventional Instruction Set Computer
 CISC Complex Instruction Set Computing
 CISC Corporate Information Systems Committee (Comité pour les systèmes d'information de l'Agence)
 CISC Call Independent Signalling Connections
 CISCO Cisco Systems Incorporated
 CISD Critical Incident Stress Debriefing
 CISM Critical Incident Stress Management (Gestion du stress en cas d'incident critique) (HRT)
 CISMO Centralised International System Management Organisation
 CISNA Certification, Infrastructure and Safety Support (with NATA, Albania)
 CIT Near or over large towns, (Cities)
 CIT Critical Incidence Technique
 CITO Collaboration Interface for Towers
 CITRAC Common Interface for Trajectory Calculation
 CITS Corporate IT Services
 CIU Cabin Interface Unit
 CIV Centre d'information de vol
 CIV Civil
 CIV/MIL TF CIVil/MILitary Task Force on mode S
 CJCE Cour de justice des Communautés européennes ; Cour de justice européenne / Court of Justice of The
 European Communities (=CJEC, COJEC)
 CJEC Court of Justice of the European Communities (=CJEC, COJEC now European Court of Justice) / Cour de
 justice des Communautés européennes ; Cour de justice européenne (=CJCE)
 CJEU Court of Justice of the European Union (Cour de justice de l'Union européenne - CJUE)
 Page 94
 EUROCONTROL AIRIAL
 Acronym Full form
 CJI Controller Jurisdiction Indicator
 CJUE Cour de justice de l'Union européenne (Court of Justice of the European Union - CJEU)
 CK ChecK
 CKD Count Key Data
 CL Controlled Load
 CL Cleared
 CL CLock
 CL Connectionless
 CL Connectionless Mode Service
 CL Code Label
 CL Cluster
 CL Centre Line
 CL Climb
 Cl.3 Class 3 Medical Certification of Air Traffic Controllers
 CLA CLA procedure, CRCO claim (CLA) procedure (Procédure CLA, procédure de réclamation)
 CLA CLear type of ice formation
 CLA OCM Clearance Echoback Message (message in the OCM Service)
 CLAM Cleared Level Adherence Monitoring
 CLAN Client's Local Area Network
 CLASS Classroom Techniques
 CLBR CaLiBRation
 CLD DCL Clearance (CPDLC)
 CLD CLouD
 CLD DCL Clearance Message (message in the DCL Service)
 Cld PT Cleared Point (N-FDPS)
 CLDM Consolidated Logical Data Model
 CLDT Calculated Landing Time
 CLG CaLlinG
 CLIMAX Offset carrier system for VHF voice communications
 CLIMAX Multi-station carrier offset mode, with voting override
 CLIP Calling Line Identification Presentation
 CLIR Calling/Connected Line Identification Restriction
 CLK CLocK system
 CLM Concept Lifecycle Model
 Page 95
 EUROCONTROL AIRIAL
 Acronym Full form
 CLNP Connectionless Network Protocol
 CLNS Connectionless Network Service
 CLP Cell Loss Priority
 CLP comité local du personnel (Local Staff Committee - LSC)
 CLP ConnectionLess Protocol
 CLPB comité local du personnel de Brétigny (Brétigny Local Staff Committee - BLSC)
 CLPP comité local pour la prévention et la protection au travail (Local Committee for Prevention and Protection at
 Work - LCPP)
 CLR CLeaR(ance), CLeaRed to...
 CLR Cell Loss Ratio
 CLSD CLoSe(D), Closing
 CLSK Commando Luchtstrijdkrachten (Dutch Air Force Command)
 CLTP ConnectionLess Transport Protocol
 CLTS ConnectionLess Transport Service
 CLV Constant Linear Velocity
 CLW Communications List Window
 CLX OCM Clearance Message
 CM Common Memory (CBN - CNG)
 CM Configuration (Context) Management
 CM Configuration Management (Gestion de la configuration)
 CM Conformance Monitoring
 CM Context Management
 cm centimeter
 CM Critical Milestone (MAS/DFS - ODS)
 CM Conflict Management
 CMA Central Monitoring Agency (NAT)
 CMA Message Comparison Area
 CMA continuous monitoring approach
 CMA Configuration Management Administration
 CMA Context Management Application
 CMAC Civil-Military ATM Coordination
 CMATMPF Civil Military ATM Performance Framework
 CMB CliMB
 CMB Combined (PSR and SSR)
 Page 96
 EUROCONTROL AIRIAL
 Acronym Full form
 CMC CIDIN Management Centre
 CMC Central Master Clock
 CMC Constant Mach Climb
 CMCES Comité Minstériel de Coordination Economique et Social (FR)
 CMCSG Civil and Military Coordination Sub-Group
 CMD Command
 CMD CoMmanD input area
 CMDE Channel Micro-code Device Exerciser
 CMDR CoMmanD Reject
 CME Coronal Mass Ejection
 CMFIS Cargo/Mail Flow Information Service
 CMG Crisis management Group
 CMG Call Management (Gestion des appels)
 CMI collège médical interinstitutionnel (Inter-institutional Medical Board - IMB)
 CMI Computer Managed Instruction
 CMIC Civil-Military Interface Standing Committee (Comité permanent d'interface civile-militaire)
 CMID Communciations "middleware"
 CMIP Contract Management and Inspection Procedures
 CMIP Common Management Information Protocol
 CMIP/S Common Management Information Protocol/Service
 CMIS Common Management Information Service
 CMIS/CMIP Common Management Information Service / Protocol
 CMISE Common Management Information Service Element
 CMM Capability Maturity Model
 CMM Core Management Meeting
 CMM Capacity Maturity Model (developed by S.E.I.)
 CMMC Central Monitoring and Management Centre
 CMMC Common Maintenance Monitoring and Control
 CMMI Capability Maturity Model Integration
 CMO CEATS Management Office (Bureau de gestion des CEATS)
 CMO Configuration Management Officer
 CMOS Complementary Metal Oxid Semiconductor
 CMOS Complementary Metal Oxide Semiconductor
 CMOT CMip Over Tcp/ip
 Page 97
 EUROCONTROL AIRIAL
 Acronym Full form
 CMP Configuration Management Plan
 CMP Communications Management Processor
 CMPL CoMPLete(d), CoMPLetion
 CMR Cell Misinsertion Rate
 CMS Circuit Management System
 CMS Common Modular Simulator (CMTP)
 CMS Central Message Switch
 CMS Control and Monitoring System
 CMS Conversation Monitor System
 CMSA Carrier Sense Multiple Access (ICAO-ADS)
 CMSA/CD Carrier Sence Multiple Access / Collision Detect
 CMSC CEATS and Maastricht Standing Committees
 CMSC Civil-Military Stakeholder Committee (comité des partenaires civils-militaires)
 CMSD Consultation of Manufacturer and Supplier Data
 CMSG Create Message
 CMT Core Management Team
 CMT Crisis Management Team
 CMT Critical Milestone Test (MAS/DFS - ODS)
 CMT Capacity Management Team
 CMTF Equipe spéciale civile-militaire d'EASIE
 CMTP Corporate Management Training Programme (Programme de formation à la gestion)
 CMTP Common Medium Term Plan (EUROCONTROL) / Plan commun à moyen terme (=PCMT)
 CMU Control Management Unit
 CMU Communications Management Unit
 CMUE Comité militaire de l'Union européenne / European Union Military Committee EMUC
 CMV Coverage Measurement Volume
 CMVRCO Cancellation Multiple Visual Representation Communication Object
 CMX Critical Milestone X
 CN Common Network (INTNET/RADNET)
 CN Correspondent Node
 CN Permanent Commission (Commission permanente)
 CN Connectivity Notification
 CN Change Notice
 CN Corporate Network
 Page 98
 EUROCONTROL AIRIAL
 Acronym Full form
 CN-SG Study Group of Alternates to the Permanent Commission
 CNAA Competent National Aviation Authority
 CNACC Common National Area Control Centre
 CNATCC Common National Air Traffic Control Centre (Bulgaria)
 CNAV Future GPS Navigation Message Structure (adopted for L5)
 CNC Computerised Numerical Control
 CND Cooperative Network Design (Conception d'un réseau coopératif)
 CND/CMF CND Central Management Functions/ Fonctions centrales de gestion (CND)
 CND/CoE CND Centre of Expertise/ (CDN) Centre d'expertise
 CND/ND CND Network Development/ (CND) Développement du réseau
 CND/SC CND SESAR Contribution/ (CND) Contribution à SESAR
 CND/SESI CND SES Implementation/ (CND) Réalisation du SES
 CNES Centre Nationale d'Etudes Spatiales (French Space Agency)
 CNFL Coordinated Flight Level (N-FDPS)
 CNG Common Network Group
 CNG2020 Carbon-Neutral Growth 2020
 CNIP Calling Name Identification Presentation
 CNIR Calling/Connected Name Identification Restriction
 CNL CaNceL(led), flight plan CaNceLlation (message type designator)
 CNL Cancel(lation) message (ICAO)
 CNL ALL Cancel All (N-FDPS)
 CNL BRT Cancel BRT (N-FDPS)
 CNLCOND ATFM Exceptional Condition Cancellation Message
 CNLCOND ATFM Exceptional Condition Cancellation Message
 CNLREG ATFM Regulation Cancellation Message
 CNM Communication Network Management
 CNOR annual leave (congés normaux) (CHRONOTIME)
 CNR Management of Common Network Resources Service
 CNS Communication, Navigation & Surveillance (les communications, la navigation et la surveillance)
 CNS ContiNuouS
 CNS Study Group of the Civil and Military Alternates to the Members of the Permanent Commission (Study Group
 of Alternates) (Groupe d'étude des Membres suppléants civils et militaires de la Commission permanente
 (Groupe d'étude des Suppléants))
 CNS-PERF CNS Performance Monitoring
 Page 99
 EUROCONTROL AIRIAL
 Acronym Full form
 CNS/ATM Communications, Navigation, Surveillance and Air Traffic Management (communications, navigation et
 surveillance/gestion du trafic aérien)
 CNS/ATM-1 Communication, Navigation and Surveillance / Air Traffic Management Package 1
 CNSFG CNS Focus Group (Groupe de réflexion sur la CNS)
 CNSG (as per CNS)
 CNT Count
 CO Call Offer
 CO Connection Oriented
 CO COllapsing
 CO Central Office
 CO Connection Mode Service
 CO2 carbon dioxide
 COBALT Common Objective Alignment Team (EATCHIP Adaptation)
 COBIT Control Objectives for Information and related Technology
 COBOL COmmon Business Oriented Language
 COBRA Cooperative Optimisation of Boundaries Routes & Airspace
 COBT Calculated Off-Block Time
 COC Combat Operations Centre or Concept
 COC Certificate of Competency
 COCA Complexity and Capacity Analysis
 COCESNA Central American Corporation For Air Navigation Service
 COCOMO COnstructive COst MOdel
 COCOS Computer Controlled SSR Code Assignment Procedures
 COCR Communications Operating Concept and Requirements
 COD SSR Code Assigment
 COD Common Medium-Term Plan Overview Document
 COD ssr CODe assignment message
 COD Cash On Delivery
 COD CMTP Overview Document, (EUROCONTROL)
 CODA Centre d'Opérations de Défense Aérienne
 CODA Central Office for Delay Analysis (Service central d'analyse des retards de trafic)
 CODASYL COnference on DAta SYstem Languages
 CODEC Coder/Decorder (ACS)
 CODOI Centre d'Opérations de la Direction Opérationnelle Intégrée (FR)
 Page 100
 EUROCONTROL AIRIAL
 Acronym Full form
 CoE Centre of Expertise (Centre d'expertise)
 COF Change of Frequency
 COF Change of Frequency (message)
 COFA Comando Operacional Força Aérea (PT)
 COFAR Common Options for Airport Regions
 COFEE Checked Operational data FEEder
 COFF Common Object Format File
 COFLIGHT French/Italian/Swiss cooperative development of a new Flight Data Processing System
 COFM Conference Facilities Management System (Système de gestion des salles de conférences)
 COG Coordination Group (meeting of the EANPG) (ICAO)
 COHO Coherent Oscillator
 COHOR Association française des coordonnateurs d'aéroport (FR)
 COI COIL
 COL COastal Line map
 COL COastLine
 COLL COLLapse flight input
 COLL Collapse
 COLOC Change of Location of Command
 COLP Connected Line Identification Presentation
 COLR Connected Line Identification Restriction
 COM data COMmunication complex
 CoM EUROCONTROL Committee of Management
 COM Circulation Opérationnelle Militaire / Operational Air Traffic (=OAT)
 COM Communications (ICAO)
 COM Aeronautical telecommunication service (Service de télécommunications aéronautiques)
 COM Communication (equipment) - flight plan item 18 indicator
 COM A standard length message (uplink)
 COM B standard length message (downlink)
 COM C extended length message (uplink)
 COM D extended length message (downlink)
 COM Team Communications Team
 COM-B Circulation opérationnelle militaire en-route
 COM-T Communications Team
 COM/DIV ICAO Communications Divisional Meeting
 Page 101
 EUROCONTROL AIRIAL
 Acronym Full form
 COM/MET Communications / Meteorology Divisional Meeting
 COM/OPS Communications/Operations (ICAO)
 COMAL COMmon Algorithmic Language
 COMALF-E Commander of Airlift Forces - Europe
 COMECON COuncil for Mutual ECONomic assistance
 COMED Combined Map and Electronic Display
 COMG Communications Group
 COMIL ATS Coordination Centre for Military Airspace Use (D)
 COMIL-1N ATS Coordination Centre for Military Airspace Utilisation - Phase 1 Network
 COMLAN COMmunication Local Area Network
 COMLOSS Communications loss
 COMM-A uplink SLM protocol
 Comm-B Mode S downlink format DF20 or 21
 COMM-B downlink SLM protocol
 COMM-C uplink ELM protocol
 COMM-D downlink ELM protocol
 COMNAV Groupe de travail sur les Télécommunications et les installations de navigation (CEAC)
 COMOPS COMputer OPeratorS (MAS Systems Div. Team)
 COMOPSAIR Air Component of the Belgian Armed Forces
 COMOS Common Mode S
 COMP Operating Company
 COMP Competency
 COMPAS Computer Oriented Metering Planning and Advisory System (D)
 COMPASS Proposed new 3-D Chinese positioning system
 COMSEC Communications Security
 COMT Communications Team
 COMUTA Comité des Usagers du Transport Aérien (FR)
 COMX Undefined Future Communication System (ODS)
 CON Contract Change Note
 CON CONnector
 CON CONsole
 CONC CONCrete
 CONCISE COsine Network's Central Information Service for Europe
 CONCOPS Concept of Operations - Mode S in Europe
 Page 102
 EUROCONTROL AIRIAL
 Acronym Full form
 COND CONDition
 CONDAR Conflict Detection and Resolution
 CONDOR Confidential Direct Occurence Report
 CONF Conference
 CONF 'CONFerence' Facility connects incoming calls to any position
 CONF Conflict
 CONFACP Conflict Accept
 ConOps Concept of Operations
 CONP Connection Oriented Network Protocol
 CONP Connected Name Identification Presentation
 CONS Connection-Oriented Network Service
 CONST CONSTructed, CONSTruction
 CONT CONTinue(d)
 CONT witness tribunal (convocation tribunal) (CHRONOTIME)
 CONT Continue
 Cont'd Continued
 CONUS Continental United States
 CONV CONVerter
 COO Chief Operating Officer (responsable en chef des opérations) (MUAC ATM)
 COO Coordinator
 CoO Contract of Objectives
 COOPANS Cooperation between LFV (SV), Naviair, Irish Aviation Authority and Thales ATM
 COOPATS Cooperative Air Traffic Services
 COORD CooRDinated
 COORD Coordination
 COP Coordination Point (SYSCO)
 COP Commission d'Ouverture des Plis (Tenders Board)
 COP Contingency Operations Plan
 COP ChangeOver Point
 COP (UNFCCC) Conference of the Parties (United Nations Framework Convention on Climate Change)
 COPG Common Operating Procedures Group
 COPP Connection Oriented Presentation Protocol
 COPS Common Operational Performance Specification
 COPTRA Combining Probable Trajectories
 Page 103
 EUROCONTROL AIRIAL
 Acronym Full form
 COR CORrect(ion), CORrected (meteo message)
 COR Code Request message
 COR Correlate
 COR CORrelate(ion)
 COR Correction request message
 COR Correct
 CORA Conflict Resolution Assistance
 CORA Conflict Resolution Advisor (Conseiller/assistant à la résolution des conflits)
 CORA COnflict Resolution Assistant
 CORA1 Conflict Resolution Assistant 1
 CORBA Common Object Request Broker Architecture
 CorC Computer language
 CORC CEU Ops Room Contingency
 CORDIS COmmunity Research & Development Information Service
 CORE CORE Requirements for ATM Working Positions
 CORE Controlled Requirements Expression
 CORINAIR Core Inventory of Air Emissions
 COROM Cognitive Competencies Model
 CORP Corporate Data Model Documentation
 CORS Continually Operating Reference Station
 CORSIA Carbon Offsetting and Reduction Scheme for International Aviation (régime de compensation et de réduction
 de carbone pour l'aviation internationale)
 CORTA Cellule d'Organisation et de Régulation du Trafic Aérien (ATMC French equivalent) (FR)
 CORUM Training and Human Resources Consultancy Company
 CORUS Concept of Operation for EuRopean UTM Systems
 CORUS 2 Concept of Operations for European U-Space II
 CORUS UCN CORUS U-space community network (CORUS UCN).
 COS Computer Operating Station
 COS Chief of Staff
 COS Cone Of Silence
 COS Continuity of Service
 COSAAC Common Simulator to Assess ATFM Concepts (Simulateur commun d'évaluation des concepts ATFM)
 COSAC Community System for Air Cargo
 COSEP Cooperative and Delegated Separation Assurance
 Page 104
 EUROCONTROL AIRIAL
 Acronym Full form
 COSIBA Common Simulation for the Balkans (Projet de simulation commune pour les Balkans)
 COSINE Cooperation for OSI Networking in Europe
 COSO Committee of Sponsoring Organisations of the Treadway Commission
 COSP Connection Oriented Session Protocol
 COSPACE Concept of limited delegation of separation assurance to the cockpit
 COSPAS Cosmicheskaya Sistyema Poiska Avariynich Sudov (RU) Space System for the Search of Vessels in Distress
 COSPAS-SARSAT COSPAS Search and Rescue Satellite-Aided Tracking
 COSSOR UK based arm of Raytheon, developing radar systems
 COST (European) Cooperation in the Field of Scientific and Technical Research
 COSU Core Systems Unit (comprises SOS and OSM)
 COSYNUS AIRBUS Training Database
 COT at the COasT
 COTP Connection Oriented Transport Protocol
 COTP4 Connection Oriented Transport Protocol
 COTR Coordination and Transfer
 COTRAC Common Trajectory Coordination
 COTS Connection-mode Transport Service (ICAO Doc 9578-AN/935)
 COTS Connection-Oriented Transport Service
 COTS Commercial Off-The-Shelf (software)
 COUC COllaboration Users Community
 COV COVer(ing), COVered e.g. by snow, ice
 CP Critical Part
 CP Connecting Point
 CP Change Proposal
 CP Circular Polarisation
 CP Current position
 CP CWP Processor Unit
 CP Contact Person (EUROCONTROL)
 CP Crédits de paiement
 CP Central Processor
 CP City Pair
 CP Conflict Probe (PATs)
 CP/M Control Programme / Monitor
 CP2 Common Project Nr 2 (or "Next Common Project")
 Page 105
 EUROCONTROL AIRIAL
 Acronym Full form
 CPA Common Procurement Agreement
 CPA Closest Point of Approach (Point de rapprochement maximal)
 CPASIN Civil aviation PAcket SwItched Network
 CPC Control and Processing Centre
 CPC Constant Pitch Climb
 CPCI Computer Program CI
 CPCO Civil Planning Communication Object
 CPCP Corrosion Prevention and Control Program (Programme de contrôle et de prévention de la corrosion - PCPC)
 CPCs Certified Professional Controllers (US)
 CPD Continuous Professional Development
 CPD CEATS Strategy, Planning and Development Programme
 CPDLC Controller-Pilot Data Link Communications (Communications contrôleur-pilote par liaison de données)
 CPE Customer Premises Equipment
 CPF Plan Forced from RPL file
 CPF Control Programme Facility
 CPF Correlated Position Reports for a Flight
 CPF Central Processing Facility
 CPG Cosine Policy Group
 CPG Curtain Path Generator
 CPG CESC Preparation Group
 CPI Call Priority Interrupt
 CPI Californian Psychological Inventory
 CPI Computer/Pbx Interface
 CPI Coherent Processing Interval
 CPICL Call Priority Interrupt Capability Level
 CPIPL Call Priority Interrupt Protection Level
 CPL Current flight PLan (message type designator)
 CPL Current Plan
 CPL Customer Priority Listing (NOG)
 CPL Commercial Pilot's Licence
 CPLDC Controller-Pilot Data Link Communications
 CPM Critical Path Method
 CPM Correlated Position Message
 CPMO CEATS Programme Management Office
 Page 106
 EUROCONTROL AIRIAL
 Acronym Full form
 CPMU Cosine Project Management Unit
 CPN Customer Premises Network
 CPO Commission consultative paritaire ouvrière
 CPO Cosine Project Officer
 CPPB CEATS Planning and Pre-validation Body
 CPR Conflict Prediction and Resolution
 CPR Compact Position Reporting
 CPR Correlated Position Report (Compte rendu de position correlé)
 CPRC Competency Process Review Committee
 CPRP Comité de pilotage de la région parisienne
 CPS Central Processing System
 CPS Customer Packet Service
 CPS Central Print Server
 CPS Concert Packet Service
 CPS Central Print Service (ODS) / Central Processing System
 CPS Characters Per Second
 CPSR Code (&) Plan Server
 CPT Cockpit
 CPU Central Processor Unit
 CPU Central Processing Unit
 CPV Common Procurement Vocabulary
 CPWG Contingency Plan Working Group
 CPWS Cooperative Pedestrian Warning System
 CPY CoPY (MADAP Disc unit)
 CQF Coverage Quality Factor
 CR Carriage Return
 CR Course to a VOR Radial (ARINC 424 Path Terminator)
 CR Contract Regulations of the EUROCONTROL Organisation (Règlement des marchés de l'Organisation
 EUROCONTROL)
 CR Croatia (country identifier)
 CR Change Request
 CR Common Requirement
 CR Call Reference
 CR Committed Rate
 Page 107
 EUROCONTROL AIRIAL
 Acronym Full form
 CR Call Related
 CR Central Region
 CR(A)OC Central Region (Air) Operations Centre
 CR/LF Carriage Return / Line Feed
 CR/SCRR/CIS direction "Service central des redevances de route et Finances"/Service central des redevances de
 route/unité "Services d'information du SCRR" (Directorate Central Route Charges Office and Finance/Central
 Route Charges Office/CRCO Information Services Unit - CR/CRCO/CIS)
 CRA Cross Reference Area
 CRAF Central Reservation Airspace Facility
 CRAF Computer Resolution Advisory Function
 CRAF Civil Reserve Air Fleet
 CRAFS Civilian Request for Airspace and Flight Data System
 CRAM Conditional Route Availability Message (Message de disponibilité/indisponibilité de route conditionnelle)
 CRAMI Centro de Retransmisión Automática de Mensajes Integrado (ES) / Automatic Messages Retransmission
 Integrated Center
 CRATF Communications Requirements Analysis Task Force
 CRC Cyclic Redundancy Check (Contrôle de redondance cyclique)
 CRC Control and Reporting Centre
 CRCO Central Route Charges Office (Service central des redevances de route - SCRR)
 CRCO/CAT Collecting, Accounting and Treasury Division of the Central Roue Charges Office
 CRD Comment Response Document
 CRD Conflict Risk Display
 CRDA Converging Runway Display Aid
 CRDS CEATS Research, Development and Simulation Centre (Centre CEATS de recherche, développement et
 simulation)
 CRDS Colour Raster Scan Display
 CRED redeployment (redéploiement) (CHRONOTIME)
 CREDOS Crosswind Reduced Separations for Departure Operations
 CREME Creating the EATCHIP Management Environment (EATCHIP Adaptation)
 CRF Central Repair Facility (Atelier central de réparation) (RMCDE - MAS)
 CRI Certification Review Item
 CRI Critical Event
 CRIDA Centro de referencia de investigación, desarrollo e innovación ATM
 CRISTAL Cooperative Validation of Surveillance Techniques and Applications
 CRISTALS Co-opeRative Validation of Surveillance Techniques and AppLications of Package 1
 CRM Collision Risk Modelling (ICAO - ADS)
 Page 108
 EUROCONTROL AIRIAL
 Acronym Full form
 CRM Coordination Revision Message
 CRM Crew Resource Management
 CRM Cockpit / Crew Resource Management
 CRM Customer Relationship Management
 CRMCS Central RADNET Monitoring and Control System
 CRME Customer Relationship Management Extension
 CRNA Centre Régional de la Navigation Aérienne (DGAC/DNA/SCTA) (FR)
 CRO Course Reservation Office
 CRO Central Reporting Office
 CROBOCOM Cross Border Communications Task Force
 CRPA Controlled Radiation Pattern Antenna
 CRPM leave replace by certified absence (congé remplacé par maladie certificat)
 CRS Computerised Reservation System
 CRS Contingency Routing System - Schéma de Réacheminement d'Urgence
 CRS Central Receiving Station
 CRS Controller Route Sequence (FPPS/DECADE)
 CRSTMP ATC capacity/routings/staffing/equipment/airspace management/special events
 CRT Choice Reaction Time
 CRT Cathode Ray Tube (ODS)
 CRWCO Civil Radar Window Communication Object
 CRZ CRuise
 CS Circuit Switch
 CS GALILEO Commercial Service
 CS Control Segment
 CS Centre Supervisor (Superviseur de Centre)
 CS Cesium
 CS Communcation Systems
 CS Carrier Sense
 CS Czechoslovakia
 CS Collapsed Sector
 CS Certification Specification (EASA)
 Cs Cirro-Stratus
 CS Callsign or Contract Signature
 CS Community Specification
 Page 109
 EUROCONTROL AIRIAL
 Acronym Full form
 CS or C/S CallSign
 CS-ACELP Conjugate Structure - Algebraic Code Excited Linear Prediction
 CS-E Certification Specification - Engines (EASA)
 CSA comprehensive systems approach
 CSA Configuration Status Accounting
 CSA Cooperative Separation Assurance
 CSA Clear Acquisition
 CSAC Cooperative Structural Airspace Concept (ICAO)
 CSAIO Conference of Staff Associations of International Organisations (conférence annuelle des associations du
 personnel des organisations internationales - CAPOI)
 CSB Carrier Plus Sideband
 CSBT Coordinated Shared Business Trajectory
 CSC Common Signalling Channel
 CSC Computer Sciences Corporation
 CSC Computer Software Component (ODS)
 CSC Central Staff Committee (comité central du personnel - CCP)
 CSC CEATS Steering Committee (Comité directeur des CEATS)
 CSC Customer Support Centre (Section of ENGD)
 CSC Communication Services Component
 CSCA Country Signing Certificate Authority
 CSCE Conférence sur la Sécurité et la Coopération en Europe / Conference on Security and Cooperation in Europe
 (=CSCE)
 CSCI Computer Software Configuration Item (ARTAS)
 CSCI Computer Software Configuration Item (ODS)
 CSCM Central System Control and Monitoring
 CSCW Computer Supported Cooperative Work
 CSD Concept and System Domain (EATMS)
 CSD Context and Scope Document
 CSD Context Specification Document (EATMS)
 CSDC Circuit Switched Digital Capability
 CSDN Circuit Switched Digital Network
 CSDT Concept & Systems Development Team
 CSDT Context and System Domain Team
 CSDW death wife during maternity (mort de l'épouse durant le congé de maternité) (CHRONOTIME)
 CSEL Combat survivor evader locator
 Page 110
 EUROCONTROL AIRIAL
 Acronym Full form
 CSET Customisation SET
 CSF Critical Success Factor (EATMS, CSD)
 CSFR Czech and Slovak Federal Republic
 CSI Computer Supported Instruction
 CSI Commercial System Integrators
 CSI Combined Safety Investigation
 CSI Critical Success Indicator
 CSIC Master Station (GLONASS)
 CSM Central Service Modules (RMCDE / RADNET)
 CSM Communications and Surveillance Management (Gestion des communications et de la surveillance)
 CSM BD Communication & Surveillance Management Business Division (EUROCONTROL - DAS Business
 Directorate)
 CSMA Carrier Sense Multiple Access
 CSMA/CD Carrier Sense Multiple Access / Collision Detection
 CSMC Call Sign Management Cell
 CSMU Crash Survivable Memory Unit
 CSN Channel Sequence Number
 CSO Customer technical Service desk and Operations
 CSP Communications Systems and Programmes (Systèmes et programmes de communication)
 CSP Cross System Product
 CSP Communication Service Provider
 CSPA Closely Spaced Parallel Approach
 CSPD Unit CEATS Strategy, Planning and Development Unit
 CSPDU CEATS Strategic Planning and Development Unit (Organisme de planification stratégique et de
 développement des CEATS)
 CSPE special awaiting decision (congés spéciaux en attente) (CHRONOTIME)
 CSPEC Control SPECification
 CSPO holding of elected public office (exercice d¿un mandat public électif) (CHRONOTIME)
 CSPR Closely Spaced Parallel Runway Operations
 CSR Corporate Social Responsibility (responsabilité sociale des entreprises - RSE)
 CSR Common Software Repository
 CSR Customer Service Requests (NOG - database for DPN operators)
 CSR Cursor
 CSRC Contents Source Identifiers
 CSS Central Supervisory Section
 Page 111
 EUROCONTROL AIRIAL
 Acronym Full form
 CSS Call Sign Similarity
 CSS Corporate Security Service (service de sécurité de l'Agence)
 CSS Customer Satisfaction Survey
 CSS Centralised Structure Store
 CSS UG Call Sign Similarity User Group
 CSSR Conventional SSR
 CSST Call Sign Similarity (Deconfliction) Tool
 CSSUG Call Sign Similarity Users Group
 CST Common Supervisory Team
 CST Calculated Start-up Time
 CST Central Standard Time, UTC -6h. (USA)
 CST Controller Support Tools
 CST Cyclic Search Table
 CSTR Constraint Maps (N-FDPS)
 CSTU Currently Signed on Terminal User
 CSU Control Sector Unit
 CSU Constant Speed Unit
 CSU Computer Software Unit (ODS)
 CSU Channel Service Unit
 CSU-P Centre Supervisor (MADAP)
 CSUG Callsign Similarity Users Group
 CSUP Centre SUPervisor
 CSV Comma Separated Values
 CSV Central Services (Unit), Maastricht
 CSW Customised Sliding Window
 CSW Channel Status Word
 CT Control Tower
 CT Core Tasks
 CT Cooperative Tools (PATs)
 CT Core Team
 CT Call Transfer
 CT Communication
 CT Centre (select)
 CT1 offline predefined radar window centre point [1]
 Page 112
 EUROCONTROL AIRIAL
 Acronym Full form
 CT1 Centre Definition1 (N-FDPS)
 CT1 radar window centre 1
 CT2 Centre Definition 2 (N-FDPS)
 CT2 user defined radar window centre point [2]
 CT2 radar window centre 2
 CTA Control Area
 CTA Controlled Time of Arrival
 CTA Contingency TACT System in IFPU2
 CTA Control Time of Arrival (when in AMAN horizon)
 CTA Calculated Time of Arrival
 CTA Cognitive Task Analysis
 CTA-SME Concerted Technology Access for SMEs
 CTAF Common Traffic Advisory Frequency
 CTAM Climb To And Maintain
 CTAS Center TRACON Automation System
 CTB Cooperative Tube Based
 CTB Common Track Block (radar programs)
 CTC Coast Time Counter
 CTC Channel To Channel
 CTC Common Trajectory Coordination
 CTC ConTaCt
 CTC Cancel All Contracts And Terminate Connection Request (ICAO)
 CTCA Channel-To-Channel Adapter
 CTD Cell Transfer Delay
 CTD Calculated time of Departure
 CTD Cancellation message, of revised ETD
 CTDL ComplemenTary Diode Logic
 CTE Calculated Time Of Entry (of aircraft into AIRSPACE_VOLUME)
 CTF Communication Task Force (EATCHIP)
 CTF Capture The Flag
 CTFM Current Tactical Flight Model
 CTG Challenges to Growth
 CTG Common Training Group (of AISAP)
 CTI Computer Telephone Integration
 Page 113
 EUROCONTROL AIRIAL
 Acronym Full form
 CTI Collegiate Training Initiative (US)
 CTL Certification Team Leader
 CTL Control
 CTM Cooperative Traffic Management
 CTM Cordless Terminal Mobility
 CTMC Continuous Time Markov Chain models
 CTMO Central Traffic Management Organisation
 CTN Corporate Telecommunication Network
 CTN CauTioN
 CTO Controlled Time Over/Overfly
 CTO Controlled Times of Overfly
 CTO Computed Time Over
 CTO Calculated Time Over
 CTOT Calculated Take-Off Time
 CTP Comité technique paritaire
 CTP Control Transfer Point (Point de transfert de contrôle)
 CTP Conventional Terrestrial Pole
 CTR ConTRoller (identity)
 CTR Control
 CTR Current Transfer Ratio
 CTR Controller or Control Zone
 CTR ConTRol zone
 CTRL Control
 CTRS Common Time Reference System (ODS)
 CTS Conformance Test Suite
 CTS Contractual Technical Specification
 CTS Central Time Source
 CTS Command and Tracking Stations
 CTS Clear To Send
 CTWUEC Committe of Transport Workers' Unions in the European Community (now FST Federation of Transport
 Workers' Unions in the European Union = acronym formed from its French title)
 CTX Calculated Time Of Exit (of aircraft into AIRSPACE_VOLUME)
 Cu Cumulus
 CU Control Unit
 Page 114
 EUROCONTROL AIRIAL
 Acronym Full form
 CU Coupling Unit
 CUA Common User Access
 CUA Common User Access
 CUAC Central European Air Traffic Services (CEATS) Upper Area Control Centre (Centre de contrôle de région
 supérieure des Services de la circulation aérienne pour l'Europe centrale (CEATS))
 CUCDB User Configuration Database
 CUD Common Unix Development Working Group
 CUF CUmuliForm
 CUG Closed User Group
 CUMA Civil Use of Military Aerodromes
 CUMATF Civil-Military Use of Military Aerodromes Task Force
 CUP Computer Utility Program
 CUP CWP-Unit Processor
 CUPPS Common-Use Passenger Processing System
 CUPS Control Unit Power Sequence
 CUR Current Sector or Centre or Controller
 CUR CURrent (sector or centre)
 CURA Civil Use of Released Airspace
 CURE cure (CHRONOTIME)
 CURTS Current Track Segment
 CUSS common-use self-service
 CUST CUSToms
 CUT Control Unit Terminal
 CUT Coding and Unit Testing
 CV Curriculum Vitae
 CV Central Version
 CVFR Controlled Visual Flight Rules
 CVO Code Validity Overlap
 CVR Cockpit Voice Recorder
 CVR Crisis Vital Records
 CVR Console Voice Recorder
 CVS Combined Vision System
 CVSD Continuous Variable Slope Delta modulation
 CVSM Conventional Vertical Separation Minima
 Page 115
 EUROCONTROL AIRIAL
 Acronym Full form
 CW Continuous Wave
 CW Call Waiting
 CW Clockwise
 CWAAS Canadian WAAS
 CWAR Continuous Wave Acquisition Radar
 CWBS Contract/Complete Work Breakdown Structure
 CWBT Computer/Web-Based Training
 CWDPS Central Weather Data Processing System
 CWP Controller Working Position (Poste de travail de contrôleur)
 CWPO CEATS Work Programme Office
 CWRS Canadian Wide Area Reference Stations
 CWS Collision Warning System
 CWS Collaborative Workstation
 CWT Channel Wrap Test
 CWY Clear WaY
 CY Cyprus (ISO Country Code)
 CY Capacity
 CYPRO Cyprus Project for ATC Improvements
 CYTA Cyprus Telecommunications Authority
 CZ Czech Republic (ISO Country Code)
 CZM Conventional Zero Meridian
 CZW Conflict Zoom Window (ODID)
 D Day
 D Display
 D Germany
 D Distance
 D Danger Area
 D&D Distress and Diversion
 D, R, P Areas Danger, Restricted and Prohibited Areas
 D-AIM Digital Aeronautical Information Management
 D-ATIS Data link / Digital - Automatic Terminal Information Service
 D-ATSU Downstream Air Traffic Service Unit
 D-BIN Downlink Broadcast Identifier Number
 D-FLUP Data Link Flight Update Service
 Page 116
 EUROCONTROL AIRIAL
 Acronym Full form
 D-Gate Development Gate (DEVD)
 D-GPS Differential Global Positioning System (ICAO - ADS)
 D-NOTAM Digital NOTAM
 D-OFIS Datalink Operational Flight Information Service
 D-OTIS Data Link Operational Terminal Information Service
 D-RAPCON Deployable Radar Approach Control
 D-RVR Data link Runway Visual Range
 D-SIGMET Digital Significant Meteorological Information
 D-TAXI Datalink Taxi Support
 D-TAXI Data-link taxi clearance delivery
 D... Prefix to Danger Area Identifier
 d.c. Direct Current / Device Control
 D.O.T Department of Transport
 D/A Digital-to-Analog
 D/CFMU Director Central Flow Management Unit (Directeur de l'Organisme central de gestion des courants de trafic
 aérien) (NB- No longer valid; replaced by NMD)
 D/CMAC & SESI Director Civil-Military ATM Coordination and SES Implementation/ Directeur "Coordination ATM civile-militaire
 et réalisation du SES"
 D/CND Director Cooperative Network Design/ Directeur «Conception d'un réseau coopératif »
 D/CRCO Director Central Route Charges Office (directeur du Service central des redevances de route)
 D/EEC; D/CEE Director EUROCONTROL Experimental Centre (Directeur du Centre expérimental d'EUROCONTROL)
 D/L Data Link
 D/R Danger / Restricted area
 D1 Pulse D1 (SSR Reply)
 D4 SESAR Fourth SESAR milestone deliverable of the definition stage
 D64U 64kbps digital leased line with octet integrity
 D8PSK Differentially encoded 8-Phase Shift Keying
 DA Danger Area
 DA position iDentification Area
 DA Direct Access
 DA Destination Address
 DA Data acquisition
 DA Direct Access (VCS)
 DA Default Addresses
 DA Data Administration
 Page 117
 EUROCONTROL AIRIAL
 Acronym Full form
 DA Due for Activation
 DA Data Authority
 DA Decision Attitude
 DA Disc Assembly
 DA Decompression Alternate (airport)
 DA Decision Altitude
 DA Descent Adviser
 DA Dimensional Aspect
 DA Designated Authority
 DA/H Decision Altitude/Height
 DAA Data Access Arrangement
 DAA Dynamic Airspace Allocation
 DAARWIN Distributed ATM Architecture based on RNAV, Workstations, Intelligent tools, and Networks
 DAAS Dependable Approach to ATM Systems
 DAB Digital Audio Broadcast
 DABS Discrete Address Beacon System (forerunner of Mode-S, USA)
 DAC Direction Aviation Civile
 DAC Dynamic Airspace Configuration
 DAC Dual Attached Concentrator
 DAC Delta Assistant Controller
 DAC Dynamic Air Traffic Control Test
 DAC Deployable ACCS Component
 DACON DAta CONcentrating device, (ADMAR)
 DACOTA Dispositif d'association de corrélation et de traitement radar pour les approches
 DACS Digital Access & Cross connect System
 DACT Dissimilar Air Combat Training
 DACU Device Attachment Control Unit
 DADI Datalink of Aircraft Derived Information
 DAF Demand Adjustment Factors
 DAF Data Analysis Facility (Software)
 DAFIF Digital Aeronautical Flight Information File
 DAG Directed Acyclic Graph
 DAG-TM Distributed Air Ground Traffic Management
 DAI Direct Access Intercom (VCS)
 Page 118
 EUROCONTROL AIRIAL
 Acronym Full form
 DAI Data Acquisition Interface
 DAI Direct Access Intercom
 DAI Development and Integration (EEC)
 DAIO Departures, Arrivals, Internals and Overflights
 DAISY Distributed Airport Information System (RUN)
 DAIW Danger Area Altitude Warning (or Area Proximity Warning)
 DAKOS Daten Kommunikationssystem (DE) / Network for German area (ex A300)
 DAKOS/CBN DAKOS Common Backbone Network (Germany)
 DAL Data Assurance Levels
 DAL Dte Address List
 DAM Data Administration Manual
 DAM Direct Access Method
 DAMA Demand Assignment Multiple Access
 DANCE Data Analysis Centre
 DANSAP Data for ANS Performance Reporting
 DAP EATM Directorate ATM Programmes (EUROCONTROL)
 DAP Directory Access Protocol
 DAP Directorate of Airspace Policy
 DAP Downlink Aircraft Parameters (Paramètres de la liaison descendante)
 DAP Directorate ATM Programmes (Direction "Programmes ATM")
 DAP Device Access Package
 DAP/SAF EUROCONTROL Safety Enhancement Business Division (Division prestataire "Amélioration de la sécurité"
 (EUROCONTROL))
 DAP/SPR DAP/Sector Productivity
 DAPs Downlink Aircraft Parameters
 DAR Digital ACMS Recorder
 DARC Direct Access Radar Channel
 DARGNE Study Group on Designators for ATS Routes, Geographical Points and Navigation Elements (ICAO)
 DARP DECO Airspace Redesign Project
 DARP Dynamic Aircraft Re-route Planning
 DARTS Decision Aid for Real-Time Synchronisation
 DAS Data Analysis Station (Hardware)
 DAS DME Based Azimuth System
 DAS Data Facility Station (Hardware)
 Page 119
 EUROCONTROL AIRIAL
 Acronym Full form
 DAS Dual-Attachment System (in optical fibre LAN rings)
 DAS Directorate ATM Strategies (Direction "Stratégies ATM")
 DAS Dual Attachment (or Attached) Station (ODS - FDDI)
 DAS Data Analysis Station (ARTAS)
 DAS/AFN DAS/Airspace Flow Management & Navigation
 DAS/ATS DAS/Air Traffic Services
 DAS/CSM DAS/Communication & Surveillance Management
 DAS/HUM EUROCONTROL EATM Human Factors Domain
 DASA Deutsche Aerospace
 Dasa Deutsche Aerospace
 DASC Digital Avionic Systems Conference
 DASD Direct Access Storage Device
 DASR Department of ATC Systems Research
 DASS Defensive Aids Sub System (A 400M)
 DASS Direct Access Secondary Storage
 DAT Data Link
 DAT Digital Audio Tape
 DAT Dynamic Address Translation
 DAT Differential Aptitude Test
 DATA madap message
 DATAS Datalink and Transponder Analysis System
 DATCO Duty Air Traffic Control Officer
 DATM Director Air Traffic Management Directorate
 DATM Digital Air Traffic Management
 DATMAS Danish Air Traffic Management Automated System
 DATS TF Delegation of ATS Task Force (ANT)
 DAV DAta Valid
 DAVINCI Departure and Arrival Integrated Management System for Cooperative Improvement of Airport Traffic Flow
 DAY DAYtime, DAYlight (operations)
 DB Database
 dB decibel
 dB(HL) decibels (Hearing Loss)
 DBA DataBase Administration
 DBC Data Bank COMECON
 Page 120
 EUROCONTROL AIRIAL
 Acronym Full form
 DBDA DataBase Design Aid
 DBE Data Bank EUROCONTROL (former name for CFMU, now NMD)
 dBi decibel with respect to an isotropic antenna
 DBM Databank Moscow
 dBm decibel, referenced to 1 milliwatt
 DBMS DataBase Management System
 DBMS Data Base/Data Bank Management System
 DBP Database EUROCONTROL Point
 DBP Deutsche Bundespost (Telecom) (DE)
 DBS Data Base System
 DBU Data Buffer Unit
 dBW decibel, referenced to 1 watt
 dBZ decibel, units of reflectivity
 DC Departure Clearance (ICAO)
 DC District of Columbia
 DC Display Controller
 DC Direct Current
 DC Delete and Cancel
 DC Device Coordinates
 DC Diagnostic Code
 DC Disconnect Confirm
 DC Device Control
 DC Software Development Section (from DEVD)
 DC4 Device Control 4 (= Stop)
 DCA Lietuvos Respublikos Civilines Aviacijos Direkcija (LT) / Lithuanian State Enterprise
 DCA Department of Civil Aviation (various countries)
 DCA Data Communication Architecture
 DCA Designated Control Area
 DCA Document Content Architecture
 DCA Data Communications/Admar (MAS Maint. Team)
 DCA Digital Communications Associates
 DCA Director of Civil Aviation
 DCA Director(ate) of Civil Aviation
 DCAC Department of Civil Aviation of Cyprus
 Page 121
 EUROCONTROL AIRIAL
 Acronym Full form
 DCAM Department Civil Aviation of Malta
 DCAN Data Collector/Area Navigation Computer
 DCAS death of ascendant (décès d'un ascendant) (CHRONOTIME)
 DCB Demand Capacity Balancing
 DCC Detection & Control Centre
 DCC Détachement Civil de Coordination (CRNA, France)
 DCC Data Country Code (CCITT X.121 Structure)
 DCC Delta Coordinating Controller
 DCC Digital Compact Cassette
 DCC Détachement Civil de Coordination (FR)
 DCCB Development Change Control Board
 DCCM Database Completeness and Coherence Messages
 DCCO death of spouse (décès du conjoint) (CHRONOTIME)
 DCCP Datagram Congestion Control Protocol
 DCCVC Direct Controller-Controller Voice Communication
 DCD Double Channel Duplex
 DCD Data Carrier Detect
 dCDB dynamic Demand and Capacity Balancing (SESAR)
 DCDU Datalink Control and Display Unit
 DCE Distributed Computing Environment
 DCE Data Circuit-terminating Equipment (RADNET / RMCDE)
 DCE Data Communications Equipment
 DCEC death child of cohabiter (décès enfant du concubin) (CHRONOTIME)
 DCEN death of child (décès d'un enfant) (CHRONOTIME)
 DCF Discounted Cash Flow
 DCF Director CF (directeur du CF)
 DCF77 German time standard, Digital Clock Function emitting on 77.5 kHz with callsign DCF
 DCFEP Data Communications Front End Processor
 DCH DeCo Coastal High
 DCIA Dependent Converging Instrument Approach
 DCKG DoCKinG
 DCL DeCo Coastal Low
 DCL Departure Clearance
 DCM Departure Clearance
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 EUROCONTROL AIRIAL
 Acronym Full form
 DCM Downstream Clearance Message (Service)
 DCM Display Control Module
 DCM Document Configuration Management (EATCHIP/EATMP)
 DCM Decomposition and Consolidation Matrix
 DCMAC Directorate of Civil-Military ATM Coordination (Direction de la coordination civile-militaire dans le domaine de
 l'ATM)
 DCMAC/HC Civil-Military Harmonisation and Support Unit (Unité "Harmonisation et soutien pour les questions civilomilitaires")
 DCMAC/NC Civil-Military Network Coordination Unit (Unité "Coordination civile-militaire au niveau du réseau ATM")
 DCMAC/SC Civil-Military Strategic Coordination Unit (Unité "Coordination civile-militaire pour les questions stratégiques")
 DCMS Data Capture & Management System
 DCN Direction des Constructions Navales
 DCND Directorate of Cooperative Network Design (Direction "Conception d'un réseau coopératif")
 DCOS Deputy Chief of Staff
 DCP Datum Crossing Point
 DCP Display Control Panel
 DCPC Direct Controller Pilot Communications
 DCPN Dynamically Coloured Petri Net
 DCPs Dedicated Personal Computers
 DCR Display Control Readout (EAS)
 DCR Design Certification Review (ODS)
 DCR Data Consistency Review
 DCS Direction du contrôle de la sécurité
 DCS Data Communication Service
 DCS Departure Control System
 DCS Digital Communication System
 DCS Double Channel Simplex
 DCS Data Communications System (of ETFMS)
 DCS Data Collection Service
 DCs Design Classes
 DCS/TELE-INFRA Data Communication Service/Telecommunication Infrastructure
 DCT Direct Routing
 DCT DireCT (Flight plan clearances & approach)
 DCT-LB Direct Telephone - Local Battery
 DCTS Digital Communications Terminal System (UACM)
 Page 123
 EUROCONTROL AIRIAL
 Acronym Full form
 DCU Display Control Unit
 DCW Digital Chart of the World
 DCW-DEM Digital Chart of the World - Digital Elevation Model
 DD Detailed Design
 DD/R Detailed Design Review
 DDA Downstream Data Authority
 DDAP Deputy Director ATM Programmes (Directeur adjoint Programmes ATM)
 DDAS Deputy Director ATM Strategies (Directeur adjoint Stratégies ATM)
 DDB Dynamic Databank/Database
 DDC Data Display Console
 DDC Direct Digital Control
 dDCB dynamic Demand Capacity Balancing
 DDCMP Digital Data Communication Message Protocol
 DDD Detailed Design Document
 DDD Direct Distance Dialling
 DDE Data Dictionary Entry
 DDE Direction départementale de l'équipement
 DDE Dynamic Data Exchange
 DDECMA Director DECMA (directeur de la DECMA)
 DDH DeCo Delta High
 DDI Domain Defined Attribute
 DDI Direct Dialling In
 DDI-F Delay Difference Indicator - Flight
 DDL Data Description Language
 DDL DeCo Delta Low
 DDM Daemon Data Manager
 DDM Data Display Monitor
 DDM Depth of Modulation
 DDM Distributed Data Management
 DDMS Digital Data Maintenance System
 DDNM directeur de la DNM (Director NMD)
 DDP Declaration of Design Performance
 DDP Domain Defined Protocol
 DDP Distributed Data Processing
 Page 124
 EUROCONTROL AIRIAL
 Acronym Full form
 DDR Downlink Data Rate
 DDR Demand Data Repository
 DDR Demand Data Repository
 DDR Dynamic Device Reconnect
 DDS Data-phone Digital Service
 DDS Document Delivery System
 DDS (ETFMS) Data Distribution System
 DDS Digital Data Set
 DDS Data Distribution Service
 DDS Digital Data Storage
 DDS-SC Data-phone Digital Service with Secondary Channel
 DDSS Digital Data Set Series
 DDT DichloroDiphenylTrichloroethane
 DDU Display Drive Unit
 DE Discard Eligibility
 DE Descend
 DE Derived Event
 DE Germany (ISO Country Code)
 DEA DBE Effort Accounting (system)
 DEA Data Exchange Agreement
 DEBI Data Exchange by Internet
 Debrief Debriefing
 Dec DECember
 DEC Delta Executive Controller
 DEC Digital Equipment Corporation
 DECADE DFS/EUROCONTROL Common ATC Development (ESCO)
 DECCA DECCA navigational facility
 DECCA Decca Navigator System (a hyperbolic low frequency radio navigation system also known as multilateration)
 DECEA Departamento de Controle do Espaço Aéreo (Brazil)
 DECLARE ETS (EU) Web-based application to manage submission and reporting on ETS monitoring, reporting and verification
 DECMA Directorate European Civil-Military Aviation (direction "Aviation civile-militaire européenne")
 DECMA/AIU Directorate European Civil-Military Aviation/Aviation Intelligence & Performance Review Unit (direction
 "Aviation civile-militaire européenne"/unité "Veille aéronautique et examen des performances")
 Page 125
 EUROCONTROL AIRIAL
 Acronym Full form
 DECMA/AIU/BIS Directorate European Civil-Military Aviation/Aviation Intelligence & Performance Review Unit/Business
 Intelligence and Statistics Unit (direction "Aviation civile-militaire européenne"/unité "Veille aéronautique et
 examen des performances"/service "Veille stratégique et statistiques")
 DECMA/CMC Directorate European Civil-Military Aviation/Civil-Military Coordination Division (direction "Aviation civilemilitaire
 européenne"/division "Coordination civile-militaire")
 DECMA/ENV Directorate European Civil-Military Aviation/Environment Unit (direction "Aviation civile-militaire
 européenne"/unité "Environnement")
 DECMA/INO Directorate European Civil-Military Aviation/Innovation Division (direction "Aviation civile-militaire
 européenne"/division "Innovation")
 DECMA/OFF Directorate European Civil-Military Aviation/Director and the Office of the Director (direction "Aviation civilemilitaire
 européenne"/directeur et le bureau du directeur)
 DECMA/PCS Directorate European Civil-Military Aviation/Plans, Cooperation and Stakeholder Support Division (direction
 "Aviation civile-militaire européenne"/division "Plans, coopération et appui aux partenaires")
 DECMA/SLO Directorate European Civil-Military Aviation/States' Liaison Office (direction "Aviation civile-militaire
 européenne"/bureau de liaison avec les États)
 DECnet Digital Equipment Network
 DECO DElta and COastal sectors
 DECOS Dependable Embedded Components and Systems
 DECT Digital Enhanced Cordless Telephone/Telecommunications (ITU)
 DECT Digital European Cordless Telecommunications (ETSI)
 DED Director EATCHIP Development (in the former Agency structure) / Direction Développement EATCHIP
 DED Directorate of EATCHIP Development
 DEE Data Entry Equipment
 DEEC Director of the EUROCONTROL Experimental Centre
 DEFAMM Demonstration Facilities for Airport Movement Management (Alcatel)
 DEFLT Default (N-FDPS)
 DEG Data Environment Generator (ODS)
 Deg Degrees (Radar Standard)
 DEG DEGree(s)
 DEGS Degraded Systems Capability
 DEI Directorate EATCHIP Implementation (in the former Agency structure) / Direction Réalisation d'EATCHIP
 DEL Delete
 DEL DELiverable
 DEL Deliverable
 DEL Data Extraction List
 DELM Downlink Extended Length Message
 Delta (Greek letter, upper case) Symbol for difference/increment
 Page 126
 EUROCONTROL AIRIAL
 Acronym Full form
 DEM Digital Elevation Model
 DEM German Marks
 DEME change of residence (changement de résidence) (CHRONOTIME)
 DEMETER Distance Measuring Equipment Tracer
 DEMETER DME Metering (analysis tool for DME coverage / NAVSEP)
 Demo Demonstration
 DENEB fog dispersal operations
 DEP DEParture (message type designator)
 DEP (Aerodrome of) DEParture
 DEP Departure Message/List
 DEP TC Departure Tactical Controller
 DEP-VKL Departure Controller
 DEPA Departure Airfield
 DEPCOS Departure Coordination System
 DEPT Department
 DEQ DE-Queue
 DER Departure End of the Runway
 DERA Defence Evaluation and Research Agency (UK) (see QinetiQ)
 DERD Darstellung Extrahierter Radar Daten (DFS) (DE)
 DERD-X Display of Extracted Radar Data - Extension (-Mini Computer)
 DERD-X/XL Display of Extracted Radar Data - Expanded/Expanded with LAN
 DES De-Suspension Message
 DES Draft EUROCONTROL Standard Document
 DES Data Exchange System
 DES Data Encryption Standard
 DES Descend, Descending to
 DES Digital European Sky (ciel numérique européen)
 DESC DESCend
 DESC Descending
 DEST DESTination (Aerodrome of) (Flight plan item 18 indicator)
 DEST Airport of Destination
 DESV Deferred Environment SerVer
 DETF Data Exchange Trest Facility
 DETR Department of the Environment, Transport and the Regions (UK)
 Page 127
 EUROCONTROL AIRIAL
 Acronym Full form
 DETRESFA code word used to designate distress phase
 DEV Domain Executive View
 DEV Development System
 DEV DEViation (magnetic)
 DEVD Development Division
 DEW Distant Early Warning (USA, DEW-Line)
 DF Direct to a Fix
 DF Finance Directorate (no longer in use as of 1.8.09)
 DF Downlink Format
 DF Direct to a Fix (ARINC 424 Path Terminator)
 DF Display filter
 DF Finance Directorate (Direction des Finances)
 DF Don't Fragment
 DF Director Finance (Directeur des Finances)
 DF Direction Finder
 DF Direction Finding or Display Field (VCS)
 DF/FIM Financial Management Unit (Unité "Gestion financière")
 DF/MIS Management Information Services (Services d'information de gestion)
 DF00 Downlink Format 00 (= Short TCAS reply)
 DF04 Downlink Format 04 (= Mode S selective surveillance reply with altitude)
 DF05 Downlink Format 04 (= Mode S selective surveillance reply with 3/A identity)
 DF11 Downlink Format 11 (= All-Call reply or TCAS squitter)
 DF16 Downlink Format 16
 DF17 Downlink Format 17
 DF18 Downlink Format 18 (= 'Non-Transponder' Extended Squitter)
 DF19 Downlink Format 19
 DF20 Downlink Format 04 (= Mode S selective surveillance reply with altitude and data)
 DF21 Downlink Format 04 (= Mode S selective surveillance reply with 3/A identity and data)
 DF5 Downlink Format 05
 DfC Direction for Change
 DFD Data Flow Diagram
 DFDAU Digital Flight Data Acquisition Unit
 DFDR Digital Flight Data Recorder
 DFH DeCo Flevo High
 Page 128
 EUROCONTROL AIRIAL
 Acronym Full form
 DFID Department For International Development
 DFIS Data Link Flight Information Service
 DFL Dynamic Flight Leg
 DFL Division Flight Level
 DFMC Dual-frequency, multi-constellation
 DFS Deutsche Flugsicherung GmbH (replaced BFS on 1.1.93)
 DFS Detailed Functional Specification (CBN - CNG)
 DFS-CCUM Deutsche FlugSicherung - Control Centre Upper Maastricht
 DFT Discrete Frequency Transmitter
 DFTI Distance From Threshold Indicator
 DFTI Distance from Touchdown Indicator
 DFU Data File Utility
 DG Drafting Group
 DG Datagram (OSI c-less transport protocol)
 DG Director General (directeur général)
 Dg Degree
 DG Directional Gyro
 DG CLIMA Directorate-General for Climate Action
 DG CONNECT EC Directorate-General for Communications Networks, Content & Technology
 DG ENV European Commission Directorate-General Environment
 DG MOVE Directorate-General for Mobility and Transport
 DG TREN Directorate-General (for) Energy and Transport (Direction générale de l'énergie et des transports)
 DG-GNSSTF Drafting Group of the Task Force on the allocation of GNSS costs
 DG-TREN Directorate-General for Transport and Energy (European Commission)
 DG/ASRO Agency Safety Regulatory Oversight Unit (Unité de supervision réglementaire de la sécurité de l'Agence)
 DG/CAB/ICS International Coordination and Stakeholders' Relations Unit (Unité "Coordination internationale et relations
 avec les partenaires")
 DG/CBP Corporate Business Planning and Monitoring Unit (Unité «Planification des activités de l'Agence et suivi des
 performances»)
 DG/CBP/PM Corporate Business Planning and Performance Monitoring
 DG/CBP/QRM Quality and Risk Management (Section « Gestion de la qualité et du risque »)
 DG/CEA Corporate Communications and External Affairs (Unité "Communication institutionnelle et affaires
 extérieures")
 DG/CEA/OCCS Online Corporate Communication Support Unit (Unité d'appui à la communication institutionnelle en ligne)
 DG/COM Office of the Director General/Corporate Communications Service (bureau du directeur général/service de
 communication de l¿Agence)
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 EUROCONTROL AIRIAL
 Acronym Full form
 DG/IA Office of the Director General/Internal Audit Service (bureau du directeur général/service d'audit interne)
 DG/JUR Office of the Director General/Legal Service (bureau du directeur général/service juridique)
 DG/LING Office of the Director General/Language Service (bureau du directeur général/service linguistique)
 DG/MIL Military Unit (Unité militaire) (EUROCONTROL)
 DG/OFF Director General Office (bureau du directeur général)
 DG/PO Office of the Director General/Private Office of the Director General (bureau du directeur général/bureau privé
 du directeur général)
 DG/PRU Performance Review Unit (Bureau d'examen des performances)
 DG/RU Regulatory Unit (Unité de réglementation)
 DG/SEC Office of the Director General/Central Secretariat Service (bureau du directeur général/service du secrétariat
 central)
 DG/SRU Safety Regulation Unit (Bureau de réglementation de la sécurité)
 DG8 Drafting Group 8 (HUM, HRT, etc.)
 DGAC Direction Générale de l'Aviation Civile (FR)
 DGCA Director General of Civil Aviation
 DGE Director General EUROCONTROL
 DGINT Special Meeting at Directors General Level on Integration Issues (ECAC)
 DGIWG Defence Geospatial Information Working Group
 DGNSS Differential Global Navigation Satellite System
 DGOF Office of the Director General (Bureau du Directeur général)
 DGON Deutsche Gesellschaft für Ortung und Navigation (DE) / German Institute for Navigation
 DGP Dangerous Goods Panel (ICAO)
 DGPS Differential GPS
 DGS Directorate of the General Secretariat (no longer in use)
 DGS Docking Guidance System
 DGS/EPR External and Public Relations = Relations extérieures et communication (no longer in use)
 DGTA Direction générale du transport aérien
 DGVII Directorate General of Transport / European Commission
 DGW Data communication GateWay
 DH Decision Height
 DHA Directorate Human Resources and Administration (Direction des Ressources humaines et de l'Administration)
 (no longer in use as of 1.8.09)
 DHA/ALDA Agency Library Documentation and Archives (Service des bibliothèques, de la documentation et des archives
 de l'Agence) (no longer in use as of 1.8.09)
 DHA/GS General Services (Services généraux) (no longer in use as of 1.8.09)
 DHA/HUM Human Resources (Ressources humaines) (no longer in use as of 1.8.09)
 Page 130
 EUROCONTROL AIRIAL
 Acronym Full form
 DHA/JUR Legal Service (Service juridique) (now DG/JUR)
 DHA/LING Language Service (Service linguistique) (no longer in use as of 1.8.09)
 DHA/M Mediation Service (Service de médiation) (no longer in use as of 1.8.09)
 DHA/OF Office of the Director (Bureau du Directeur) (no longer in use as of 1.8.09)
 DHA/SD Social Dialogue Office (Bureau du dialogue social) (no longer in use as of 1.8.09)
 DHA/SEC Central Secretariat (Secrétariat central) (no longer in use as of 1.8.09)
 DHA/W Welfare Service (Service des affaires sociales) (no longer in use as of 1.8.09)
 DHC Delta High Coordinating controller
 DHCF Distributed Host Command Facility
 DHCP Dynamic Host Configuration Protocol
 DHE Delta High Executive controller
 DHM Digital Height Model
 DHMI Devlet Hava Meydanlari Isletmesi (Turkey) / State Agency for Airports and Air Traffic Control
 DHP Direct Host Processor
 DHR Directorate Human Resources (no longer in use)
 DHS Department of Homeland Security (US)
 DHT Data Handling Tools
 Di Detectability
 DI Designator Identifier
 DIA Data Information Analysis Business Division (EUROCONTROL - DAP Business Directorate)
 DIA Data Information & Analysis
 DIADAM Distributed ATM Data Management
 diag DIAGnostic(s)
 DIAL DIALogue console
 DIANA Documento del Impacto de la Armonización / Integración de la Navegación Aérea en Europa (ES)
 DIANE Direct Information Access Network for Europe
 DIANS Director Institute of Air Navigation Services (Directeur de l'Institut de la navigation aérienne)
 DIB Directory Information Base
 DICE Direct Course Error
 DID Direct Inward Dialling
 DID Direct Identification Data
 DID Data Item Description
 DIF DIFfuse
 DIGEST Digital Exchange Standards
 Page 131
 EUROCONTROL AIRIAL
 Acronym Full form
 DIGIT (European Commission) Directorate General for Informatics
 DIGITS Demonstration of ATM Improvements Generated by Initial Trajectory Sharing
 DII Defence Information Infrastructure
 DIL Data Integrity Level
 DIL Data Items List
 DILCS Dedicated Intelligence Loop Circuits System
 DIN Deutsche Industrienorm(ung)
 DIO DIOde
 DIO Deco Input Operator
 DIP Dual In-line Package
 DIRA Department for Interdisciplinary Relations of Aviation
 DIRCAM Direction de la Circulation Aérienne Militaire
 DIRECT Dynamic Resectorisation and Route Coordination System
 DIS Data Displayed
 DIS Directorate Infrastructure ATC Systems and Support (EUROCONTROL, EATMP) / Direction "Infrastructure,
 Systèmes ATC et Appui"
 DIS/HUM ATM Human Resources Unit (also know as HUM unit)
 DISC DISConnect (Command)
 DISG DMEAN Implementation Support Group
 DIST DISTance
 DIT Data Integrity Tool
 DIT Directory Information Tree
 DITC Divisional IT Coordinator
 DITE Distributed IT Equipment
 DITS Digital Information Transfer System
 DIV Diversion message
 DIV DIVert(ing) or DIVerging
 DIXEL DIsplay ELement
 DJD Design Justification Document
 DK Denmark
 DL Distribution List
 DL Data Link
 DLA DeLAy(ed) (Message type designator)
 DLAP Data Link Applications Processor
 Page 132
 EUROCONTROL AIRIAL
 Acronym Full form
 DLARD Data Link Application Requirements Document (Description) (ICAO)
 DLASD Data Link Application Systems Document
 DLAT Directory Look Aside Table
 DLC Data Link Connection
 DLC Data Link Control (ADMAR)
 DLCI Data Link Channel Identifier
 DLCP Data Link Control Protocol
 DLCR Datalink capability Report
 DLCRD Data Link Communication Requirement Document
 DLE Data Link Entity
 DLF Data Link Frame
 DLF Data Link Function
 DLH Deutsche Lufthansa (Germany)
 DLIC Data Link Initiation Capability (ICAO)
 DLL Delay Locked Loop
 DLL Data Link Layer
 DLL Data Link Logon
 DLM Data Link Manager
 DLPU Data Link Processing (Processor) Unit
 DLR Deutsches Zentrum für Luft- und Raumfahrt e.V. / German Aerospace Centre (formerly the German
 Aerospace Research Institute)
 DLS Data Link Splitter
 DLS Direct Link Service (services de liaison de données)
 DLS Data Link Service
 DLS Data Link Sublayer
 DLS Device Level Selection
 DLS IR Data Link Services Implementing Rule / Implementing Rule on Data Link Services
 DLT Digital Linear Tape
 DLTA Difference from Long-Term Average metric
 DLW Departure List Window (ODID)
 DLY Daily (official ICAO acronym)
 DM Disconnected Mode
 DM Distributed Management
 DM Design Model
 Page 133
 EUROCONTROL AIRIAL
 Acronym Full form
 DM Departure Manager (PATs)
 DM Downlink Message
 DMA Divergence Monitoring and Alert
 DMA Direct Memory Access
 DMA Decision Making Aids
 DMA Dynamic Mobile Area
 DMA Defense Mapping Agency
 DMAN Departure Manager (Gestionnaire des départs)
 DMAS Distributed Management Accounting System
 DMAS Director Maastricht Control Centre (Directeur du Centre de contrôle de Maastricht)
 DMC Detachment of Military Coordinators (FR)
 DME Distributed Management Environment
 DME Distance Measuring Equipment
 DME/N Distance Measurement Equipment / Normal
 DME/P Distance Measuring Equipment
 DMEAN Dynamic Management of the European Airspace Network (Gestion dynamique du réseau aérien européen)
 DMI Digital Multiplexed Interface
 DMIN MINimum Distance
 DML Data Manipulation Language
 DMM Directorate's Management Meeting
 DMM Dynamic Memory Management
 DMOD Distance MODification (TCAS)
 DMP Documentation Management Plan
 DMP Dynamic Map Parameters
 DMR Data Modification Request
 DMS Document Management System
 DMS Distribution Management System
 DMS Departure Management System
 DMS Database Management System
 DMS Data Management System
 DMS Development Management System
 DMSR Dossier Minimum de Séparation Radar
 DMSS Development Maintenance and Support Service
 DMT Development Infrastructure Management Tool
 Page 134
 EUROCONTROL AIRIAL
 Acronym Full form
 DMUAC Director MUAC (directeur du MUAC)
 DMZ Demilitarised Zone
 DNA DeoxyriboNucleic Acid
 DNA Digital Network Architecture
 DNA Direction de la Navigation Aérienne (DGAC) (FR)
 DNAs ECAC Directors of Air Navigation
 DND Do Not Disturb
 DNDO Do Not Disturb Override
 DNG DaNGer(ous)
 DNIC Data Network Identification Code (CCITT X.121 Structure)
 DNIC Dynamic Network Identification Code
 DNM Director Network Management (directeur "Gestion du réseau" - directeur DNM)
 DNM/ACD direction "Gestion du réseau"/division "Espace aérien et capacité" (Network Management
 Directorate/Airspace and Capacity Division - NMD/ACD)
 DNM/BCS direction "Gestion du réseau"/service "Coordination des activités" (Network Management
 Directorate/Business Coordination service - NMD/BCS)
 DNM/INF direction "Gestion du réseau"/division "Infrastructure" (Network Management Directorate/Infrastructure
 Division - NMD/INF)
 DNM/NOM direction "Gestion du réseau"/division "Opérations" (Network Management Directorate/Operations Division -
 NMD/NOM)
 DNM/OFF direction "Gestion du réseau"/directeur DNM et le bureau du directeur DNM (Network Management
 Directorate/Director and the Office of the Director - NMD/OFF)
 DNM/SAF direction "Gestion du réseau"/unité "Sécurité opérationnelle, SQS et gestion coordonnée des risques"
 (Network Management Directorate/Operational Safety, SQS and Integrated Risk Management Unit -
 NMD/SAF)
 DNM/TA conseiller en technologie (Network Management Directorate/Technology Advisor - NMD/TA)
 DNM/TEC direction "Gestion du réseau"/division "Technologie" (Network Management Directorate/Technology Division -
 NMD/TEC)
 DNM/TRG direction "Gestion du réseau"/division "Formation" (Network Management Directorate/Training Division -
 NMD/TRG)
 DNS Domain Name System
 DNS Digital Network Signalling
 DNV GL Det Norske Veritas Germanischer Lloyd
 DO Direction des opérations
 DO Document
 DO/EC Directions des opérations/échelon central
 DO260A RTCA Document 260A (ADS-B MOPS)
 DOA Dead On Arrival
 Page 135
 EUROCONTROL AIRIAL
 Acronym Full form
 DOC Document (ICAO)
 DOC Direct Operating Cost
 DOC Designated Operational Coverage
 DoC Domain of Cooperation
 DOD Department Of Defense (USA)
 DOD Detailed Operational Description
 DoD MIL Department of Defence - military
 DoDAF Department of Defense Architecture Framework
 DODAR Diagnosis, Options, Decision, Assessment and Revision
 DOF Date of Flight
 DOI Domain Of Interest (= Multilateration Coverage Volume)
 DOI Department of Industry
 DOM DOMestic
 DOM Dictionary of Messages
 DOP Dilution of Precision
 DOP Directors of Operations
 DOP Daily Operations Plan
 DOP Data Operations Provider
 DOPS Directors Operations
 DoR Domain of Responsibility
 DORA Directorate Operational Research and Analysis (UK)
 DOS Disc/Disk Operating System
 DOS Delegation Of Separation
 DOS Directory of Services
 DOT Department of Transportation
 DOT Department of Transport
 DOTS Dynamic Ocean Tracking System
 DOV Data Over Voice
 DOVE Datalink Operational Validation Experiments
 DOVID Diffractive Optically Variable Image Device
 DoW Description of Work (S-JU)
 DOW Day Of Week
 DP Data Processing
 DP Discussion Paper
 Page 136
 EUROCONTROL AIRIAL
 Acronym Full form
 DP Documentation Plan
 DP Deployment Programme (programme de déploiement)
 DP Data Packet
 DP Departure Procedure (see SID)
 DP Data Provider
 DP Dew Point temperature
 DP&P Data Processing and Peripherals
 DPA Data Provider Agreement
 DPA Distinguishing Path Attribute
 DPAL Data Processing Assurance Level
 DPC Defence Planning Committee
 DPC Data Processing Chain
 DPCX Distributed Processing Control eXecutive
 DPDG Diplomatic and Protocol Drafting Group
 DPE Digital Plot Extractor
 DPF Data Preparation Facility
 DPI Departure Planning Information
 dpi Dots Per Inch
 DPI droits de propriété intellectuelle (Intellectual Property Rights - IPR)
 DPIO DPI Originator
 DPL Duplicate PLan (TID)
 DPL Displayed Flight Plan
 DPL Deputy Project Leader
 DPM Delta-Plane Motorisé (FR)
 DPMI Dos Protected Mode Interface
 DPN Data Packet Network
 DPN100 Data Packet Network switch
 DPO Data Protection Officer
 DPR Dynamic Path Reconnect
 DPS Distributed Processing System
 DPS Data Product Specification
 DPS Detailed Production Specification
 DPS Data Processing System
 DPS Directorate Pan-European Single Sky
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 EUROCONTROL AIRIAL
 Acronym Full form
 DPS Data Preparation System
 DPS/OFF Directorate Pan-European Single Sky/Director's Office
 DPS/PEC Directorate Pan-European Single Sky/Pan-European Coordinator
 DPS/PEPR Directorate Pan-European Single Sky/Pan-European planning, monitoring and reporting
 DPS/PFC Directorate Pan-European Single Sky/Performance Coordinator
 DPS/POL Directorate Pan-European Single Sky/Support to SES-related policies
 DPS/PRU Directorate Pan-European Single Sky/Performance Review Unit
 DPS/SLO Directorate Pan-European Single Sky/States Liaison Office
 DPS/SSR Directorate Pan-European Single Sky/Support to States and Regional initiatives
 DPS/STAN Directorate Pan-European Single Sky/Support to Standardisation
 DPS/TEC Directorate Pan-European Single Sky - Support to EU on ATM technical regulation
 DPSADD-TF Data Processing Systems Architecture Description Document Task Force (ATD)
 DPSK Differential Phase Shift Keying
 DPT DePTh
 DPT Dynamic Time-based Planning
 DQAP Data Quality Assurance Plan
 DQAS Data Quality Assurance Summary Report
 DQPSK differential quadrature phase shift keying
 DQR Data Quality Requirements
 DQTS Data Quality Tool Set (Jeu d'outils de contrôle de la qualité des données)
 DR Digital Recorder (ADMAR)
 DR Directorate of Resources (Direction des Ressources)
 DR Disaster Recovery
 DR Disconnect Request
 DR Delivery Report
 DR Danger/Restricted area
 DR Downlink Request (control bits)
 DR Dead Reckoning
 DR/ABP Directorate Resources/Agency Business Plan and Performance Management (Plan stratégique de l�Agence et
 gestion des performances)
 DR/AD Directorate of Resources/Administration
 DR/AD/BB Budget Process (Processus budgétaire)
 DR/AD/CMSR Corporate Management Systems and Reporting (Systèmes de gestion et information)
 DR/AD/FA Financial Administration (Administration financière)
 Page 138
 EUROCONTROL AIRIAL
 Acronym Full form
 DR/AD/PA Payroll/Pensions (Paie / pensions)
 DR/AD/PROC Procurement (Achats)
 DR/AD/PS Partnership and Agreements (Partenariats et accords)
 DR/AD/RR Rules and Regulations (Dispositions statutaires et réglementaires)
 DR/AD/TR Treasury (Trésorerie)
 DR/APP Directorate of Resources/Agency Planning and Performance
 DR/ATT Directorate of Resources - Accounting and Treasury
 DR/BPG Directorate of Resources/Business Partnering (Partenariat d'affaires)
 DR/BPG/FIN Finance Business Partnering (Partenariat d'affaires « Finances »)
 DR/BPG/HR Human Resource Business Partnering (Partenariat d'affaires « Ressources humaines »)
 DR/BPG/ICS ICS Business Partnering (Partenariat d'affaires ICS)
 DR/BPG/SUP Support (Business Partnering) (Appui au partenariat d'affaires)
 DR/COM Directorate of Resources/Corporate Communications and Stakeholder Relation Management Unit
 DR/CS Directorate of Resources/Corporate Services (Services intégrés)
 DR/CS/FL Directorate Resources/Corporate Services/Facility Management and Logistics (Gestion des installations et
 logistique)
 DR/CS/ICS DR/CS/Information and Communication Systems and Technology(Systèmes et technologies d'information et
 de communication)
 DR/CS/KM Directorate Resources/Corporate Services/Knowledge Management (Gestion des connaissances)
 DR/CS/LING Directorate Resources/Corporate Services/Language Service (Service linguistique)
 DR/CS/SEC Directorate Resources/Corporate Services/Central Secretariat (Secrétariat central)
 DR/FLO Directorate of Resources - Facilities and Logistics
 DR/FPR Directorate of Resources - Finance and Procurement
 DR/JUR Directorate of Resources/Legal Service
 DR/OF Office of the Principal Director
 DR/PF Directorate of Resources/Pension Fund
 DR/PM Directorate of Resources/People Management (Gestion du personnel)
 DR/PM/OD Organisational Development (Développement organisationnel)
 DR/PM/PD People Development (Développement du personnel)
 DR/PM/PS People Support (Appui au personnel)
 DR/PM/RM Recruitment and Mobility (Recrutement et mobilité)
 DR/PPF Directorate of Resources - Planning & Performance
 DR/SD Directorate Resources/Social Dialogue (Dialogue social)
 DRA Defence Research Agency (UK)
 DRA Defense Research Agency (UK)
 Page 139
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 Acronym Full form
 DRACAS Data Reporting And Corrective Action System
 DRAG Double Regulation (Working Group)
 DRAHG Double Regulation Ad-hoc Group
 DRAHG Double Regulation Ad-hoc Group / Groupe ad hoc sur la double réglementation
 DRAM Dynamic Random Access Memory
 DRC Data Rate Control
 DRC Dynamic Route Change
 DRC Defence Review Committee
 DRC Data Recording
 DRCP Data Reduction Computer Program
 DRDF Digital Readout Direction Finder
 DRET Directorate Resources Executive Team
 DRF Departure Flow Regulation
 DRF Document Review Form
 DRFEP Direct Radar Front End Processor
 DRG DuRinG
 DRH Direction des Ressources Humaines (=DHR) (FR)
 DRMS Distance Root Mean Square
 DROU travelling time (délai de route) (CHRONOTIME)
 DRP Disaster Recovery Plan
 DRSB DR Supervisory Board
 DRSN low DRifting SNow
 DRTL Disaster Recovery Team Leader
 DRUG Dutch Radars Users Group (NL-EUROCONTROL)
 DRUM Diagnostic Recorder for Usability Measurement
 DS Double Slope
 DS Differentiated Services
 DS Data Source
 DS deployment scenario
 DSA Directory System Agent
 DSA Director(ate) Safety, Airspace, Airports and Information Services (EUROCONTROL, EATMP) / Direction
 'Sécurité, Espace aérien, Aéroports et Services d'information'
 DSA Directory Service Agent
 DSAC Civil Aviation Safety Directorate
 Page 140
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 Acronym Full form
 DSAP Destination Service Access Point (RMCDE / RADNET)
 DSB Double Side Band (8.33 User Guide)
 DSB Dutch Safety Board (Onderzoeksraad Voor Veiligheid, OVV)
 DSB-AM Double Side Band - Amplitude Modulation
 DSC Downstream Clearance
 DSCP DiffServ CodePoint
 DSCVHF Digital Selective Calling - Very High Frequency
 DSD Data Structure Diagram
 DSE Dialogue Service Element
 DSF Distribution and Switching Facility
 DSG Datalink Support Group (SESAR Deployment )
 DSI Data Source Interface (ODS)
 DSI Denmark/Sweden Interface
 DSK Disk
 DSL Digital Subscriber Line
 DSLM Downlink SLM
 DSM Digital Surface Model
 DSM Departure Suspense Message
 DSNA Direction des services de la navigation aérienne (Directorate Air Navigation Services, France)
 DSP Digital Signal Processor
 DSP Datalink Status Panel
 DSP Digital Signal Processing
 DSP Domain Specific Part
 DSP Data Link Service Provider
 DSR Director SESAR and Research
 DSR/CMN Directorate SESAR and Research/Contribution Management Division
 DSR/CMN/APT Airport Unit (DSR)
 DSR/CMN/ATS Air Traffic Service Unit (DSR)
 DSR/CMN/DCM Deputy Contribution Manager (DSR)
 DSR/CMN/FRM Flexible Resource Management (DSR)
 DSR/CMN/IM System Wide Information Management/ Enterprise Architecture Unit (DSR)
 DSR/CMN/INO Innovative Research Unit (DSR)
 DSR/CMN/MP Master Plan Maintenance Unit (DSR)
 DSR/CMN/NAV Navigation - CNS Research Unit (DSR)
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 Acronym Full form
 DSR/CMN/NET Network Unit (DSR)
 DSR/CMN/PM Transversal Performance & Methods Unit (DSR)
 DSR/CMN/VIF Validation Infrastructure (DSR)
 DSR/PSO Directorate SESAR and Research/EUROCONTROL SESAR Joint Undertaking Project Support Office
 DSS Direct Sequence spread Spectrum
 DSS Directorate Single Sky - Direction "Ciel unique"
 DSS Data Systems Specialist
 DSS Direct Subsystem
 DSS Decision Support System
 DSS/CM Directorate Single Sky/Civil-Military ATM Coordination Division
 DSS/CM/ATM Civil-Military - ATM Coordination Unit (DSS)
 DSS/CM/CNS Civil-Military - CNS Coordination Unit (DSS)
 DSS/CM/SEC Civil-Military - ATM Security Coordination Unit (DSS)
 DSS/CM/SES Civil-Military - SES Implementation Support Unit (DSS)
 DSS/CM/SPM Civil-Military - SESAR Programme Manager (DSS)
 DSS/EIPR Directorate Single Sky/European Implementation Planning and Reporting Unit
 DSS/OFF Office of the Director DSS
 DSS/OVS Directorate Single Sky/Oversight Division
 DSS/OVS/NOS Network Oversight Unit (DSS)
 DSS/OVS/SAF Safety Oversight Support Unit (DSS)
 DSS/PRU Directorate Single Sky/ Performance Review Unit
 DSS/PRU/DAT Safety and Data Section (DSS)
 DSS/PRU/ECO Economics Section (DSS)
 DSS/PRU/PO Project Office (DSS)
 DSS/PRU/QOS Quality of Services Section (DSS)
 DSS/REG Directorate Single Sky/Regulatory Support Division
 DSS/REG/CAA Support to CAA/NSA Unit (DSS)
 DSS/REG/ENV Environment Unit (DSS)
 DSS/REG/FRM Flexible Resource Management (DSS)
 DSS/REG/SES SES Unit (DSS)
 DSS1 Digital Signal System No.1
 DSS1 Digital Subscriber Signalling No1
 DST Decision Support Tools
 DST Direct Support Task
 Page 142
 EUROCONTROL AIRIAL
 Acronym Full form
 DST Daylight Saving Time
 DSU Data-Source Selector Unit
 DSU Division Support Unit
 DSU Direct Support Unit
 DSU Declaration of suitability for use
 DT Displaced Threshold
 DT Data Terminal
 DT&E Development, Test and Evaluation
 DTAM Descend To And Maintain
 DTCM Discrete Time Markov Chain models
 DTE Data Terminal Equipment (RMCDE)
 DTED Digital Terrain Evaluation Data (ECAC)
 DTED Digital Terrain Elevation Data
 DTF Data Link Test Facility (ICAO)
 DTG Date Time Group
 DTHR Displaced threshold
 DTI Direction de la technique et de l'innovation
 DTI Department for Trade and Industry
 DTL Development Team Leader
 DTM Digital Terrain Model
 DTMF Dual Tone Multi Frequency
 DTMS Database & Transaction Management System
 DTN Data Transport Network
 DTOW Default Take-Off Weight
 DTP Desk Top Publishing
 DTR Data Terminal Ready
 DTRT DeTerioRaTe(ing)
 DTS Distributed Time Service
 DTS Data Transmission System
 DTS Data Terminal Set
 DTT Distance to Touchdown
 DTT Development Test Team
 DTU Data Transmission Unit (VCS)
 DTV Digital Television
 Page 143
 EUROCONTROL AIRIAL
 Acronym Full form
 DTVOR Doppler Terminal VOR
 DTW Departure Tolerance Window
 DU Digital User Signalling
 DU Display Unit
 DU Digital Signalling User
 DU Data User
 DU-TF Digital User Signalling Task Force
 DUA Data User Agreement
 DUA Directory User Agent
 DUA Dedicated User Area
 DUAT Direct User Access Terminal
 DUATS Direct User Access Terminal System
 DUAU Data Update and Access Unit
 DUC Determined Unit Cost
 DUC Dense Upper Cloud
 DUEACT an sfpl is "DUE for ACTivation"
 DUEV Daten Übertragungs- und Verteiler-System (DE)
 DUP DUPlicate
 DUPL-MIL Send Flight Plan Info to Dutch Mil (N-FDPS)
 DUR Determined Unit Rate
 DUR DURation
 DUR Desired/Undesired Signal Ratio
 DUT Device Under Test
 DUX DUpleX
 DVAS Documentation and Visual Aids Specialist
 DVI Direct Voice Input
 DVI Digital Video Interactive (Intel)
 DVM Digital VoltMeter
 DVMG Digital Video Map Generator
 DVO Direct Voice Output
 DVOR Doppler VOR
 DVOR Distance VOR
 DVORTAC DVOR combined with TACan
 DVP Development Verification Platform (part of EGNOS)
 Page 144
 EUROCONTROL AIRIAL
 Acronym Full form
 DWD Deutscher Wetterdienst (German Weather Service)
 DWDM Dense Wave Data Multiplexing
 DWG DMEAN Working Group
 DWH Network Management Data Warehouse
 DWN DoWN (Device status indication)
 DWP Departure Waypoint
 DWP Destination waypoint
 DX DupleX
 DXC Digital cross Connect (technology)
 DXT Data eXtracT
 DYN Dynamic Maps (N-FDPS)
 DYNAV Dynamic Route Availability
 DZ De-conflicting Zone (FSSkt-A)
 DZ Algeria (ISO Country Code)
 DZ DriZzle
 DZH DeCo Zeeland High
 DÜS Düsseldorf
 DÜV Datenübertragungs und Verteiler System (DE)
 E Error
 E Spain
 E East, Eastern longitude
 E&M Earth and Mark Signalling
 E&OE Errors & Omissions Excepted
 E+M signalling
 E-AMAN Extended Arrival Management
 E-ATSAW Enhanced Airborne Traffic Situational Awareness
 E-DPI Early DPI
 E-learning Electronic Learning
 E-Mail Electronic Mail
 e-NM Enhanced Network Management
 E-OCVM European Operational Concept Validation Methodology / méthode européenne de validation des concepts
 opérationnels
 E-Scan Electronically Scanned
 E-SCAN Electronic SCAN
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 EUROCONTROL AIRIAL
 Acronym Full form
 e-STAR ETFMS - Satellite Telecommunications Access for Redistribution of data
 E-TIBA Enhanced Traffic Information Broadcast by Aircraft
 E.316 ITU-T Reccomendations of Telephone Numbering
 E.g For Example
 e.m. electromagnetic
 E/LCIP mechanism European/Local Convergence and Implementation Plan (mechanism) (now replaced by the ESSIP/LSSIP
 mechanism)
 E1 Proposed Galileo Frequency (1589 MHz)
 E1 2048kbps interface
 E2 Proposed Galileo Frequency (1561 MHz)
 E5 Proposed Galileo Frequency (1202 MHz)
 E6 Proposed Galileo Frequency (1278 MHz)
 EA Europe Airsports
 EA Extended Address
 EA Expedited data Acknowledgement
 EA Enterprise Architecture
 EAA European Aviation Agency
 EAB European ATM Board
 EAB European AIS Database and Aeronautical Information Bureau (Bureau « Base européenne de données AIS
 et information aéronautique »)
 EAC East Assistant Controller
 EACAC Evolutionary AIR Ground Cooperative ATM Concept
 EACCC European Aviation Crisis Coordination Cell (cellule européenne de coordination de crise dans le secteur
 aérien)
 EACG European ATFM Consultation Group
 EACI SG Eatms Architecture and Cns Infrastructure Sub-Group
 EACNSISG EATCHIP Architecture and CNS Infrastructure Sub-Group
 EACP European Aeronautical Common Position (Position aéronautique européenne commune)
 EAD Economic Analyses and Databases Section (ICAO)
 EAD Earliest Arrival Date
 EAD European AIS Database (Base européenne de données AIS)
 EAD BUP EAD Backup Site
 EAD SF EAD Surveillance Function
 EAD SGR EAD Sub-Group
 EAD SSG EAD Service Steering Group
 Page 146
 EUROCONTROL AIRIAL
 Acronym Full form
 EAD TF European Ais Data base implementation Task Force
 EAD WP EAD Working Position
 EAD-ONL EAD Online Environment
 EAD-TDS EAD Test and Development Environment
 EAD-TRG EAD Training Environment
 EADCOS EAD Coordination Subgroup
 EADI Electronic Attitude Director Indicator
 EADS European Aeronautic Defence and Space Company
 EADTF European AIS Database Task Force
 EAEA European ATM Enterprise Architecture
 EAEC European Airlines Electronics Committee
 EAER European Aviation Environmental Report
 EAG European ATFM Group (Groupe ATFM européen)
 EAG Event Analysis Group
 EAG European Aeronautical Group
 EAGDCS European Air/Ground Data Communication Services
 EAGLES European Air Ground Laboratory for Efficient System Integration
 EAH Erroneous AFTN Header
 EAIMS European ATM Information Management Service
 EAIP Electronic AIP
 EAIP-TF Electronic Aeronautical Information Publication (Task Force)
 EAM EUROCONTROL Airspace Model
 EAM ESARR Advisory Material
 EAM-GUI ESARR Advisory Material - Guidance Material
 EAM3/AMCE ESARR3 Advisory Material - Guidance on AMC in relation to ESARR3
 EAM3/GUI1 ESARR3 Advisory Material - Guidance Document 1
 EAM3/GUI2 ESARR3 Advisory Material - Guidance Document 2
 EAM3/GUI3 ESARR3 Advisory Material - Guidance Document 3
 EAM3/GUI4 ESARR3 Advisory Material - Guidance Document 4
 EAM3/GUI5 ESARR3 Advisory Material - Guidance Document 5
 EAM3/ICAO ESARR3 Guidance Material - Consistency between ESARR 3 and ICAO SARPs
 EAMG SSG EAMG Systems Sub-Group
 eAMI electronic Airspace Management Information message
 EAN European ANSP Network
 Page 147
 EUROCONTROL AIRIAL
 Acronym Full form
 EAN European Air Traffic Service Organisations Network
 eANP electronic Air Navigation Plan
 EANPG European Air Navigation Planning Group (Groupe européen de planification de la navigation aérienne
 (GEPNA))
 EANS Estonian Air Navigation Services
 EAO Enseignement Assisté par Ordinateur (=CBT)
 EAOG European Airline Operations Group
 EAP EATCHIP Alignment Process
 EAPAIRR European Action Plan for Airspace Infringement Risk Reduction
 EAPM ECAC Airspace Planning Manual
 EAPPRE European Action Plan on the Prevention of Runway Excursions
 EAPPRI European Action Plan for the Prevention of Runway Incursions (Plan d'action européen pour la prévention
 des incursions sur piste)
 EAPPRI European Action Plan for the Prevention of Runway Incursions
 EAPRLB European Action Plan for the Prevention of Level Busts (Plan d'action européen pour la réduction des
 transgressions de niveau de vol)
 EARN European Academic Research Network
 EAROM Electrically Alterable ROM
 EARTS En-Route Automated Radar Tracking System
 EAS EATMP Advisory Services
 EAS Emergency Avoidance System
 EAS EURCONTROL Advisory Services
 EAS Equivalent AirSpeed
 EAS Effort Accounting System
 EAS European AIS System
 EASA European Union Aviation Safety Agency (Agence européenne de la sécurité aérienne - AESA)
 EASC European ATM Staff Representatives Conference
 EASCG European ATM Standardisation Coordination Group
 EASEG EUROCONTROL Ad hoc ATM Security Group (Groupe ad hoc d'EUROCONTROL pour la sécurité de l'ATM)
 EASG EASIE ATM Support Group
 EASIE Enhanced Air Traffic Management and Mode S Implementation in Europe (Amélioration de la gestion du trafic
 aérien et mise en oeuvre du Mode S en Europe)
 EASIT European Association for Software access & Information Transfer
 EASP European Aviation Safety Programme
 EASp European Aviation Safety Plan
 EASPG European Aviation System Planning Group (ICAO)
 Page 148
 EUROCONTROL AIRIAL
 Acronym Full form
 EASS European Aviation Safety Seminar
 EASSP EUROCONTROL Specification for ATM Surveillance System Performance
 EAT Estimated Approach Time
 EAT Experiments and Trials platform (Plate-forme d'expérimentations et d'essais)
 EAT Expected Approach Time
 EATA Enhanced AT Attachment (bus)
 EATCHIP European Air Traffic Control Harmonisation and Integration Programme (see EATMP) ; Programme européen
 d'harmonisation et d'intégration du contrôle de la circulation aérienne
 EATCHIP LO EATCHIP Liaison Officer
 EATCHIP OCD Operational Concept Document
 EATCOS ECAC TF on the Integration of European ATC Systems
 EATF EATMS Architecture Task Force
 EATFCM Enhanced Air Traffic Flow and Capacity Management (amélioration de la gestion des courants de trafic
 aérien et de la capacité)
 EATM European Air Traffic Management Service Business Unit (Service prestataire de gestion du trafic aérien en
 Europe)
 EATM European Air Traffic Management (EUROCONTROL)
 EATMA European Air Traffic Management Architecture
 EATMN European Air Traffic Management Network
 EATMP European Air Traffic Management Program (Programme européen de gestion de la circulation aérienne)
 EATMS European Air Traffic Management System (Système européen de gestion de la circulation aérienne)
 EATN European ATN
 EATN Experimental Aeronautical Telecommunication Network (RADNET)
 EATRADA European ATM Research And Development Association
 EAUP European Airspace Use Plan
 EAVU EUROCONTROL Airspace Validation Unit
 EAW Easy Access to Weekend (Routes)
 EAWDG EATMS Architecture Workshop Drafting Group
 EB Executive Board (of the EUROCONTROL Agency)
 EB EastBound
 EBAA European Business Aviation Association
 EBACE European Business Aviation Convention & Exhibition
 EBCDIC Extended Binary Coded Decimal Interchange Code
 EBITDA Earnings Before Interest, Taxes, Depreciation and Amortization (résultat avant intérêts, impôts et
 amortissements)
 EBP Emergency Bypass Processor (ODS)
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 Acronym Full form
 EBRD European Bank of Reconstruction and Development (Banque Européenne de la Reconstruction et le
 Développement, BERD)
 EBT Evidence-Based Training
 EBU European Broadcasting Union
 EC European Community/ies
 EC Executive Controller
 EC Eyes closed
 EC Executive Controller (also referred to as Radar Controller)
 EC European Commission (to be avoided because of possible confusion with European Community/ies)
 (Commission européenne - CE)
 ECA European Cockpit Association
 ECA Executive Assistant Controller (position)
 ECA Executive Controller Assistant
 ECAA European Common Aviation Area
 ECAC European Civil Aviation Conference (Conférence européenne de l'aviation civile - CEAC)
 ECAC ATI ECAC/ Air Transport Industry (AEA, IATA)
 ECAC-DGCA ECAC Directors General of Civil Aviation
 ECAC-JAA ECAC Joint Aviation Authorities
 ECAF ECAC Centralised Airspace Facility
 ECAM European Congress of Aerospace Medicine (congrès européen de médecine aéronautique)
 ECAM Electronic Centralised Aircraft Monitoring (airborne display)
 ECARDA European Coherent Approach to Research and Technological Development for ATM
 ECAST European Commercial Aviation Safety Team
 ECB Event Control Block
 ECB European Central Bank
 ECBAG EATCHIP Cost-Benefit Advisory Group
 ECC Exemption Coordination Cell
 ECC EAN Consortium Committee
 ECC EATCHIP Coordination Committee
 ECC Error Correction Code
 ECC-AIRS European Coordination Centre for Aircraft Incident Reporting Systems (EC)
 ECCAIRS European Coordination Centre for Aircraft Incident Reporting Systems (EC)
 ECCB Engineering Change Control Board
 ECCB EUROCONTROL Change Control Board
 ECCG Experimental Centre Consultation Group (Groupe consultatif sur le Centre expérimental)
 Page 150
 EUROCONTROL AIRIAL
 Acronym Full form
 ECCM Electronic Counter CounterMeasures
 eCE enlarged Committee for Route Charges (Comité élargi pour les redevances de route)
 ECEF Earth-Centered-Earth-Fixed
 ECF Enhanced Connectivity Facility
 ECFEP Extended Communication Front End Processor
 ECG EATMP Communications Gateway
 ECG ElectroCardioGram
 ECG European Communication Gateway
 ECGD Export Credit Guarantee Department
 ECHO EATCHIP CNS/ATM Holistic Model Using RM-ODP
 ECHO European Concept for Higher Airspace Operations
 ECHOES EUROCONTROL - Consolidation of HMI for Operations, Evaluations and Simulations
 ECHQ EUROCONTROL Headquarters
 ECI Every-Citizen-Interface
 ECI Earth Centred Inertial
 ECI Ead Client Interface
 ECIP European Convergence and Implementation Plan (Plan européen de convergence et de réalisation) (now
 replaced by ESSIP)
 ECIPD Document ECIP (now replaced by ESSIP (documents))
 ECIT EAD Client Interface Terminal
 ECIT-SDR ECIT System Design Review
 ECIV ECI Validation Suite
 ECL En-route Cruising Level (N-FDPS)
 ECLECTIC Electronic separation Clearance Enabling the Crossing of traffic under Instrument meteorological Conditions
 (CENA Project)
 ECM EATCHIP Coordination Meeting
 ECM Electronic Counter Measure / Message
 ECM Executive Control Message
 ECM Extended Callsign Menu
 ECMA European Computer Manufacturers' Association
 ECMC ETFMS Central Monitoring and Control System
 ECMT European Conference of Ministers of Transport
 ECN Explicit Congestion Notification
 eCN enlarged Commission (Commission élargie)
 ECODA Enhanced Central Office for Delay Analysis (Service central amélioré d'analyse des retards de trafic)
 Page 151
 EUROCONTROL AIRIAL
 Acronym Full form
 ECOP Entry Coordination Point
 ECP Engineering Change Proposal
 ECP Expedite Clearance Procedure
 ECR Event Contract Request (ICAO)
 ECRG Experimental Centre Review Group
 ECRSG EATMS Concept & Requirements Sub-Group
 ECS ETFMS Central System
 ECSC European Conference on Satellite Communications
 ECSIO Exit Coordination Status In/Out
 ECSM European Cyber Security Month
 ECSTF ETFMS Communications and Systems Task Force
 ECT European CONOPS Team
 ECT European Coordination Team (EUROCONTROL Fire Brigade)
 ECTAA European Travel Agents' and Tour Operators' Associations
 ECTF EATMS Concept Task Force
 ECTL EUROCONTROL (unofficial abbreviation)
 ECU European Currency Unit = Unité de compte européenne
 ECX European Climate Exchange
 ED Entry Departure
 ED Error Detail
 ED EUROCAE Document
 ED (50) European Datum
 Ed(s) Editor(s)
 ED-101 Eurocae Document 101
 ED-102 Eurocae Document 102
 ED-115 Eurocae Document 115
 ED-117 Eurocae Document 117
 ED-126 EUROCAE Documentation on ADS
 ED-12A Eurocae Document 12A
 ED-12B Eurocae Document 12B
 ED-14D Eurocae Document 14D
 ED-14E Eurocae Document 14E
 ED-43 Eurocae Document 43
 ED-73B Eurocae Document 73B
 Page 152
 EUROCONTROL AIRIAL
 Acronym Full form
 ED-87 Eurocae Document 87
 ED126 Eurocae Document 126
 ED50 European Datum 1950 (Geodetic system)
 ED70 European Datum 1970 (Geodetic system)
 ED87 European Datum 1987 (Geodetic system)
 EDA European Defence Agency (Agence européenne de défense - AED)
 EDA Electro-Dermal Activity measurement
 EDAG European Delay Analysis System Advisory Group
 EDAG European Delay Analysis System Advisory Group (Groupe consultatif sur le système européen d'analyse des
 retards)
 EDAS European Delay Analysis System
 EDAS European Delay Analysis System (Système européen d'analyse des retards)
 EDAY End DAY
 EDB Environmental Data Base
 EDCT Expect Departure Clearance Time
 EDD Electronic (Tabular) Data Display
 EDD / TID EDD / Touch Input Device
 EDD-VKL EDD-controller/planner-controller
 EDDF Environmental Data Processing and Distribution Function
 EDDUS EDD Update System
 eDEP EUROCONTROL Simulation Capability And Platform for Experimentation (Potentiel de simulation et plateforme
 d'expérimentation d'EUROCONTROL)
 eDEP Early Demonstration and Evaluation Platform
 EDGE EDGE (of runway)
 EDI Electronic Data Interchange / Echange de Données Informatisés
 EDIFACT Electrical Data Interface for Administration Commerce and Transport (ODS)
 EDIM Electronic Data Interchange Message
 EDIMS Electronic Data Interchange Message Service
 EDISOFT Empresa de Serviços e Desenvolvimento de Software, S.A. (PT)
 EDL Event Driven Language
 EDMM Engineering and Development Management Meeting
 EDMS European Messaging Directory Services
 EDMS Emission Dispersion Modelling System
 EDMS Engineering Data Management System (ODS - MAS)
 EDOP Enhanced Directors of Operations Forum
 Page 153
 EUROCONTROL AIRIAL
 Acronym Full form
 EDP Environmental Data Processing
 EDP Electronic Data Processing
 EDPD Environmental Data Processing and Distribution
 EDQ External Data Quality tool
 EDS Explosives Detection System
 EDS Early Departure Scheme
 EDS Engineering Design System
 EDS Environment Dependent System
 EDS European Directory Service
 EDT Electronic Data Terminal
 EDTCB ENV Data Transfer Control Board
 EDTF EATM E-learning Developers TaskForce
 EDTO Extended Diversion Time Operations
 EDTR Environment Data Transfer Report
 EDV Elektronische Daten Verarbeitung (DE) (=EDP)
 EDX Event Driven eXecutive
 EE Estonia (ISO Country Code)
 EEA European Environment Agency (Agence européenne pour l'environnement - AEE)
 EEA European Economic Area
 EEB European Environmental Bureau
 EEC Electronic Engine Control
 EEC Enterprise Electronic Corporation
 EEC European Economic Community (former name of European Union)
 EEC EUROCONTROL Experimental Centre (Centre expérimental d'EUROCONTROL (CEE))
 EEC/BSC EUROCONTROL Experimental Centre / Building Steering Committee (decision DG)
 EEE Etudes, Essais and Experimentation
 EEG ElectroEncephaloGram
 EEI Essential Elements of Information
 EEIG European Economic Interest Group
 EEPROM Electrically Erasable Programmable Read-Only Memory (EEC)
 EES European Eastern States
 EET Estimated Elapsed Time
 EET Eastern European Time
 EF End Frame
 Page 154
 EUROCONTROL AIRIAL
 Acronym Full form
 EFAP Enhanced Future ATM Profile
 EFAS Effort Accounting System (Système de comptabilisation des temps de travail)
 EFB Electronic Flight Bag
 EFCT Expected Further Clearance Time
 EFD ETFMS Flight Data
 EFDFMG EUROCONTROL Flow Data and Flow Management Group
 EFDP European Flight Data Processing (Système européen de traitement des données de vol)
 EFFP Environment-Friendly Flight Path
 EFI Electronic Flight Instruments
 EFIR European Flight Information Region
 EFIS Electronic Flight Instrument System
 EFIX External Fix
 EFL Estimated Flight Level
 EFL Entry Flight Level (for the first MADAP sector)
 EFMS Experimental Flight Management System (Système expérimental de gestion de vol)
 EFO Enhanced Flight Operations
 EFOB Estimated Fuel On Board
 EFP España-France-Portugal Plan (cooperation agreement)
 EFPD Extended Flight Plan Description
 EFPD electronic flight planning device
 EFPL Extended Flight Plan
 EFPM Extended Flight Plan Message
 EFPS electronic flight progress strip
 EFPS External Front Processing System (PALLAS system)
 EFQM European Foundation for Quality Management (Fondation européenne pour le management par la qualité)
 EFR Extended Flight Rules (FREER)
 EFS Electronic Flight Strip
 EFS ETFMS Fallback System
 EFS Extended Flight Store
 EFSU EUROCONTROL FAB Support Unit
 EFTA European Free Trade Association
 eFUA Enhanced Flexible Use of Airspace
 EFVS Enhanced Flight Vision System
 EG Egypt (ISO Country Code)
 Page 155
 EUROCONTROL AIRIAL
 Acronym Full form
 EGA Enhanced Graphics Adapter
 EGAST European General Aviation Safety Team
 EGAT EGATS (CHRONOTIME)
 EGATCM EUROCONTROL Guild of Air Traffic Controllers - Maastricht
 EGATS EUROCONTROL Guild of Air Traffic Services
 EGCSA Enhanced Ground Controller Situational Awarness
 EGD EUROCONTROL Generic Document
 EGERIA Engineering Group for European Integration ATC
 EGIP European Gateway for International NOTAM Operation Provision (Point d'accès européen au service de
 gestion des NOTAM internationaux)
 EGIS EUROCONTROL Guidelines for Implementation Support
 EGM Earth Gravitational Model
 EGNOS European Geostationary Navigation Overlay Service (Complément géostationnaire européen de navigation)
 EGNOS-EM European Geostationary Navigation Overlay Service - East Mediterranean
 EGP Exterior Gateway Protocol
 EGPWS Enhanced Ground Proximity Warning System
 EGSMM EUROCONTROL Generic Safety Management Manual
 EGT Exhaust Gas Temperature
 EGU European Gliding Union
 EGU ENV Graphical User Interface (old name, see CHMI)
 EHA European Helicopter Association
 EHC East High Coordinator controller
 EHD Danger Area (followed by identification) [NL]
 EHE East High Executive controller
 EHEST European Helicopter Safety Team
 EHF Extremely High Frequency
 EHFAG European Human Factors Advisory Group
 EHQ EUROCONTROL Headquarters
 EHR Restricted Area (followed by identification) [NL]
 EHS Enhanced Mode S surveillance (Surveillance enrichie en Mode S)
 EHSI Electronic Horizontal Situation Indicator
 EHT Extra High Tension
 EIA Electronic Industries Alliance, formely Electronic Industries Association
 EIA Electrical Industries Association
 Page 156
 EUROCONTROL AIRIAL
 Acronym Full form
 EIA Environmental Impact Assessment
 EIAP European Integrated Aeronautics Programme
 EIB European Investment Bank / Banque Européenne d'Investissement
 EIBT Estimated In-Block Time
 EICAS Engine Indication and Crew Alert System
 EIF European Interoperability Framework
 EIF Extended Interface Function
 EIIC Electronics Installation and Implementation Centre
 EIPA European Institute of Public Administration
 EIPR European IPS Repository
 EIPS European IPS Repository
 EIR Equipment Identity Register
 EIRS External Interface Requirement Specification
 EIS Environmental Information Sampling
 EIS EUROCONTROL Implementation Support
 EIS Electronic Indicating System (Airbus)
 EKF Extended Kalman Filtering
 EKF-IMM Extended Kalman Filter - Interacting Multiple Model
 EL Entry Lateral
 EL Elevation
 EL ELectroluminescent (display panel)
 EL/KYB Eectro-Luminescent Keyboard
 ELAN EAD LAN
 ELBA Emergency Location Beacon Aircraft
 ELD Environment Load System
 ELDT Estimated Landing Time
 ELE Elementary Surveillance
 ELEC elections (élections) (CHRONOTIME)
 ELEF ELf Electric Field
 ELEV Elevation (environment)
 ELF Extremely Low Frequency
 ELFAA European Low Fares Airline Association
 ELINT Electronic Intelligence
 ELISE Exact Landing Interference Simulation Environment
 Page 157
 EUROCONTROL AIRIAL
 Acronym Full form
 ELM Extended Length Message
 ELMF ELf Magnetic Field
 ELMO EUROCONTROL Logging and Monitoring for OJTI
 ELMS Electronic Learning Management System
 ELPAC English Language Proficiency for Aeronautical Communications
 ELR Extra Long Range
 ELS Electronic Library Service (System)
 ELS Emergency Landing Strip
 ELS Elementary Surveillance (Surveillance élémentaire) (Mode S)
 ELS mode S ELementary surveillance
 ELS-OP TF Mode S Elementary Surveillance - Operational Introduction
 ELSA Enhanced Large Scale ATN deployment
 ELSH EUROCONTROL Self-Registration Application (ICS environment)
 ELT Emergency Locator Transmitter
 ELVIRA Extremely Low Visibility Instrument Rotorcraft Approaches
 ELVIRA Enregistrement Lecture Visualisation Information Radar
 ELW Exerted Landing Weight
 ELW Extended Label Window
 EM Empty Module
 EM Electromagnetic
 EM Exempted
 EM EMission
 EM End of Medium
 EM Error Mechanism
 EMA Enterprise Management Architecture
 EMAC European Middle
 East ATM Coordination Mechanism (Dispositif de coordination Europe - Proche-Orient
 pour l'ATM)
 EMAN En-Route Manager
 EMAS Engineered Materials Arresting System
 EMAS Environmental Management Audit System (Hamburg Airport)
 EMB EUROCONTROL Medical Board (commission médicale d'EUROCONTROL)
 EMB Executive Management Board
 EMB EUROCONTROL Medical Board (commission médicale d'EUROCONTROL)
 EMBD EMBeDded (Cloud types, Layers)
 Page 158
 EUROCONTROL AIRIAL
 Acronym Full form
 EMC EAMTP Management Committee
 EMC Electromagnetic Compatibility
 EMCC EATMP Management Coordination Committee
 EMCIT ElectroMagnetic Compatibility of IT products
 EMCON Emission Control
 EMCR(ATC) Requirements for European Class 3 Medical Certification of Air Traffic Controllers
 EMD Editorial Manager on Duty
 EME EUROCONTROL Military Expert (Expert militaire d'EUROCONTROL)
 EMEP European Monitoring and Evaluation Programme
 EMER Emergency
 EMER Flight in state of emergency (Flight plan status indicator)
 EMERALD EMErging and Activities of reLevance to ATM concept Definition (European Commission)
 EMERG EMERGency
 EMERTA EMERging Technologies opportunities, issues and impact on ATM
 EMEU EUROCONTROL Military Expert Unit (Unité des experts militaires d'EUROCONTROL)
 EMF Electro Motive Force
 EMF Exercise Management Facility (Simulator)
 EMF Excellence Management Function
 EMG ElectroMyoGram
 EMG EAD Management Group
 EMG Emergency (ICAO)
 EMH EATMP Management Handbook
 EMI ElectroMagnetic Interference
 EMIRA EUROCONTROL Maastricht Information Retriever Application (Progiciel de recherche d'information pour
 EUROCONTROL- Maastricht)
 EMIS EATCHIP Management Information System
 EMM Expanded Memory Manager
 EMM Extractor Monitoring Message
 EMM Engineering Management Meeting
 EMMA European Airport Movement Management by A-SMGCS
 EMOD Emitting MODule on the mc side
 EMOSIA European Model for ATM Strategic Investment Analysis
 EMOTION 7 European Maintenance of TCAS II Version 7 (Gestion européenne du TCAS II version 7)
 EMP ElectroMagnetic Pulse
 Page 159
 EUROCONTROL AIRIAL
 Acronym Full form
 EMR Error Management Restriction
 EMS EATCHIP Management Support
 EMS Emergency Medical Service
 EMS European Mode S Station
 EMS Environment Management System
 EMS Expanded Memory Specification
 EMS European Mobile System
 EMSA European Maritime Safety Agency
 EMSEC Emission Security
 EMSO EATCHIP Management Support Organisation
 EMSS European Mobile Satellite Services
 EMT Eye-Movement tracking
 EMT Editorial Manager Team
 EMTO ECAC Medium-Term Objectives Group (to deal with 'Constraints to Growth'
 EMU European Monetary Union
 EMU Extended Memory Unit
 EMUC European Union Military Committee / CMUE Comité militaire de l'Union européenne
 EN European Standard
 EN Entry Node
 EN Enabler
 ENA Escuela Nacional de Aeronáutica (ES)
 ENAC Italian Civil Aviation Authority (Ente Nazionale per l'Aviazione Civile)
 ENAC Ecole Nationale de l'Aviation Civile (FR), French Civil Aviation School
 ENAIRE ANSP Spain
 ENAV Ente nazionale di assistenza al volo (Italian Government Agency for Air Traffic and Aeronautical Services)
 END European Norm Draft
 END Key for aborting the current operation
 END stop END (relating to RVR)
 ENE East-North-East
 ENG ENGine
 ENG Engineering
 ENGD Engineering Division
 ENHANCE EuropeaN Harmonised Aircraft Noise Control modelling Environment (NATSDORA)
 ENIAC Electronic Numerical Integrator and Computer
 Page 160
 EUROCONTROL AIRIAL
 Acronym Full form
 ENISA European Union Agency for Cybersecurity (Agence de l¿Union européenne pour la cybersécurité)
 ENJJPT Euro-NATO Joint Jet Pilot Training
 ENNA Etablissement National de la Navigation Aérienne (FR)
 ENOC European Network Operating(tion) Concept
 ENPI European Neighbourhood and Partnership Instrument
 ENPRM EUROCONTROL Notice of Proposed Rule-Making (Avis de proposition de réglementation
 d'EUROCONTROL)
 ENQ ENQuiry
 ENR En Route, En-route
 ENRI Electronic Navigation Research Institute (US - ADS)
 ENRT EN-RouTe
 ENT EGNOS Network Time
 ENUM E.164 Numbering mapping to URI
 ENV Environmental studies (Études environnementales)
 ENV Environment
 ENV Environment business area (Domaine Environnement)
 ENV KPI Environment Key Performance Indicators
 ENVCOOR Environment Coordinators; National Environment Coordinator Meetings
 EO Executive Objectives (EATMS - CSD)
 EO Eyes Open
 EOA End Of Address
 EOAG European Operations Advisory Group (Groupe consultatif européen "Operations")
 EOB End Of Business (i.e. end of working day)
 EOB End Of Block
 EOBD Estimated Off-Block Date
 EOBDT Estimated Off-Block Date and Time
 EOBT Estimated Off-Block Time
 EOC Edge Of Coverage
 EOCD EATMS Operational Concept Document
 EOCG EUROCONTROL Operations Consultative Group
 EODP EATMS Options Discussion Paper
 EOF End Of File
 EOG ElectroOculoGram
 EOI Expression of Interest
 Page 161
 EUROCONTROL AIRIAL
 Acronym Full form
 EOIG EGNOS Operators and Infrastructure Group - the ATS providers in the states formerly known as the IKD
 States
 EOLIA European Pre-operational Datalink Applications Project
 EOM End Of Message
 EONS EUROCONTROL Open and Generic Graphic System / Système graphique ouvert et générique
 d'EUROCONTROL
 EOP End Of Picture
 EOQ European Organisation for Quality
 EoS Element of Service
 EOS Executive Operations Support (support opérationnel exécutif)
 EOSD Evaluation of Operational System Deficiencies
 EOSID Engine-out Standard Instrument Departure Procedure
 EoSM Efficacy of Safety Management
 EOT End of Transmission
 EOT&V EGNOS Operational Test & Validation
 EP European Parliament
 EP Expert Panel
 EPA Event Processor Array
 EPAC Eatchip Policy and Allocation Committee
 EPAC EUROCONTROL Programme Appraisal Committee (Comité d'évaluation des programmes
 d'EUROCONTROL)
 EPATS European Personal Air Transport System
 EPB EATCHIP Project Board
 EPC Enhanced Planning Control
 EPC Enhanced Planning and Coordination function (project of MDP phase I)
 EPCM Enhanced Planning Control Message
 EPD EATCHIP Planning Division (EUROCONTROL)
 EPFLY ExPerimental FLYing
 EPG EASIE Policy Group
 EPHOS European Handbook for Open Systems
 EPI Electrical Power Installation
 ePIB Electronic Pre-flight Information Bulletin
 EPIC European Programme for the Implementation of a Common geodetic reference frame (WGS 84)
 EPIC Extended PCM Interface Controller (ACS)
 EPIC Emergency Procedures Information Centre
 Page 162
 EUROCONTROL AIRIAL
 Acronym Full form
 EPIC EUROCONTROL Publication and Information Centre (Centre d'information et de publications
 d'EUROCONTROL)
 EPISMAS Economic Performance Indicators in Support of Mathematical Air Traffic Control Simulations
 EPLD Erasable Programmable Logic Device
 EPM EATCHIP Planning Method
 EPM Electromagnetic Protection Modification
 EPMB EASIE Programme Management Board
 EPNL Effective Perceived Noise Level
 EPNS Electro-Plated Nickel Silver
 EPOL Elliptical Polarisation
 EPP Extended Projected Profile
 EPR External and Public Relations = Relations extérieures et communication
 EPROM Erasable-Programmable Read-Only-Memory
 EPRT External Processing Response Time
 EPS Exercise Preparation Suite (Simulator)
 EPS Emergency Power Supply
 EPSG European Petroleum Survey Group
 epsilon (Greek letter, lower case) Symbol for azimuth increment
 EPSU European Public Service Union
 EPT EUROCONTROL English language Placement Test
 EPT Estimated Parking Time
 EPT Effective Performance Time
 EPU Estimated Position Uncertainty
 EQ Equalizer (NOT Equipment !)
 EQA European Quality Award
 EQF EUROCONTROL Quality Forum (Forum Qualité d'EUROCONTROL)
 EQM Engineering Quality Manual (MUAC)
 EQPM Equipment and Systems
 EQPT EQuiPmenT (instrumentation, communication)
 Eqpt Equipment
 EQUATOR Environment for Qualitative Temporal Reasoning (AI)
 Equipe R Perception des redevances de route au titre des accords bilatéraux passés avec des Etats non-contractants =
 Collection of air navigation charges under bilateral agreements with non-Contracting states (= R Team)
 ER ERror (TPDU)
 ER En-Route
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 EUROCONTROL AIRIAL
 Acronym Full form
 ER Executive Rule (for the use of Safety Management System)
 ER Elementary Restart
 ER TC En-Route Tactical Controller
 ER-PC En-Route Planning Controller
 ERA European Regional Airlines Organisation
 ERA European Regional Airlines Association
 ERA European Research Area
 ERA Czech Republic Manufacturer of MLAT and ADS-B equipment
 ERA Economic Regulation Analysis
 ERA Economic & Regulatory Affairs (Unit) (CRCO) ((Unité) «Affaires économiques et réglementaires»)
 ERABIS (Swedish) Route Invoicing System
 eRAD electronic Route Availability Document
 ERAF EUROCONTROL Regulatory and Advisory Framework (Cadre réglementaire et consultatif
 d'EUROCONTROL)
 ERAM EUROCONTROL Risk Analysis Method
 ERAM EUROCONTROL Remuneration Adjustment Method (Task Force)
 ERAM (TF) EUROCONTROL Remuneration Adjustment Method (Task Force)
 ERASMUS En-Route Air Traffic Soft Management Ultimate System
 ERATO En Route Air Traffic Organiser
 ERATS Environmentally-responsible Air Transport
 ERBD European Bank for Reconstruction and Development
 ERC EUROCONTROL Research Centre
 ERCG External Relations Coordination Group
 ERCS EXM Resistant Communications System
 ERD Entity Relationship Diagram
 ERD End Routing Domain
 ERDF European Regional Development Fund / Fonds européen de développement régional (=FEDER)
 ERDS Error Recording Data Set
 ERDs End Routing Domains
 ERDT Estimated ReaDy Time for Movement
 EREF External REFerence
 ERF EUROCONTROL Regulatory Framework (Cadre réglementaire d'EUROCONTROL)
 ERFA Conference on the Economics of Route Air Navigation Facilities and Airports (ICAO) = Conférence sur
 l'économie des installations et services de navigation aérienne de route et des aéroports
 eRIA early Regulatory Impact Assessment
 Page 164
 EUROCONTROL AIRIAL
 Acronym Full form
 ERIP EAD Remote Interface Package
 ERIS EATMP Reference Industry-based ATM Simulation and trials platform Programme (Programme ERIS
 (EATMP Reference Industry-based ATM Simulation and trials platform))
 ERIS eDEP Early Demonstration and Evaluation Platform for Rapid Prototyping
 ERM En-Route Metering
 ERM Estimate Revision Message
 ERM Enterprise Risk Management
 ERM EMC Replication Manager (ENGD)
 ERML ERM Long
 ERMS ERM Short
 ERN Earth Referenced Navigation
 ERN ERNtebrück (Air Defence Station)
 ERND European Route Network Design
 ERNIP European Route Network Improvement Plan (plan d'amélioration du réseau de routes européen)
 ERNP European Radio Navigation Plan (European Commission)
 ERP Event-Related Potential
 ERP Effective Radiated Power
 ERP Expenditure Review Process
 ERP Earth Rotation Parameters
 ERP Extracted Route Points (FPPS/DECADE)
 ERP Enterprise Resource Planning system
 ERR Error Message
 ERR En-Route Radar
 ERRIDS European Regional Renegade Information Dissemination System (Système régional européen de diffusion
 d'informations sur les aéronefs présentant un comportement suspect)
 ERS Environment Reporting System (Système de communication d'informations sur l'environnement)
 ERS Extracted Route Sequence
 ERS Early Retirement Scheme
 ERSA Effective use of Reserved or Segregated Airspace
 ERSS EUROCONTROL Radar Surveillance Standard
 ERT Expected Ready Time
 ERT Execution Reference Time
 ERV ECM Resistant Voice
 ERYM ex République yougoslave de Macédoine (=FYROM)
 ES End Service (CPDLC)
 Page 165
 EUROCONTROL AIRIAL
 Acronym Full form
 ES Extended Squitter
 ES EUROCONTROL Standard (Norme EUROCONTROL)
 ES Emergency System (ODS)
 ES Elementary Airspace
 ES Spain (ISO Country Code)
 ES Enhanced Surveillance
 ES End Service / System
 ES Entry Sector
 ES End System
 ES Entry Subjacent
 ES-ES End System to End System
 ES-IS End System to Intermediate System (Routing Information Exchange Protocol)
 ES2 Experience Sharing to enhance SMS
 ES2 Experience Sharing to Enhance SMS
 ESA Electronically Scanned Array
 ESA Emergency Safe Altitude
 ESA European Space Agency (Agence spatiale européenne)
 ESA Enterprise Systems Architecture
 ESAM European Society of Aerospace Medicine
 ESAO Environmentally Sustainable Airport Operations
 ESARR EUROCONTROL Safety Regulatory Requirement (Exigence réglementaire de sécurité EUROCONTROL)
 ESARR 5 EUROCONTROL Safety Regulatory Requirement for ATM Services' Personnel (SRC)
 ESARR1 EUROCONTROL Safety Regulatory Requirement 1 Safety Oversight in ATM
 ESARR2 EUROCONTROL Safety Regulatory Requirement 2 Reporting and Assessment of Safety Occurrences in
 ATM
 ESARR3 EUROCONTROL Safety Regulatory Requirement 3 Safety Management Systems in ATM
 ESARR3 EUROCONTROL Safety Regulatory Requirement (Use of safety management systems by ATM service
 providers)
 ESARR4 EUROCONTROL Safety Regulatory Requirement 4 Risk Assessment and Mitigation in ATM
 ESARR5 EUROCONTROL Safety Regulatory Requirement 5 ATM Services' Personnel
 ESARR6 EUROCONTROL Safety Regulatory Requirement 6 Software in ATM Systems
 ESASSP EUROCONTROL Specification for ATM Surveillance System Performance
 ESB enterprise service bus
 ESC ESCape
 Page 166
 EUROCONTROL AIRIAL
 Acronym Full form
 ESC European ATM Systems and Convergence Business Division (Division prestataire "Système ATM européen
 et convergence")
 ESC Environment Services Component
 ESC BD European ATM Systems & Convergence Business Division (EUROCONTROL)
 ESCAN Electronically Scanned
 ESCAPE Eurocontrol Simulation Capability And Plaform for Experimentation
 ESCAT Emergency Security Control of Air Traffic
 ESCO Executive Support and Coordination Office
 ESCON Extended Serial Connection
 ESCP European Strategic Coordination Platform (EASA)
 ESDAP-SG Enhanced Surveillance DAP Steering Group
 ESDF Environmental Static Data Processing and Distribution Function
 ESDI Enhanced Small-Device Interface
 ESE East-South-East
 ESE Equivalent Spherical Error
 ESF Essential Support Facilities
 ESF Equivalent Safety Finding
 ESG Environmental, Social and Governance
 ESG Extended Scenario Generator
 ESH End System Hello
 ESI EAD System Interface (Interface système de l'EAD)
 ESI-V EAD System Interface - Validation
 ESIGETEL Ecole Superieure en informatique et genie des telecommunications
 ESIM ESARR Implementation (Mise en oeuvre des ESARR)
 ESIMS ESARR Implementation Monitoring and Support (Programme) (Programme de suivi et d'appui à la mise en
 oeuvre des ESARR)
 ESL Entry Sequence List
 ESME Enhanced Simulation Modelling Environment
 ESMTP Enhanced SMTP
 ESO European Standardisation Organisation
 ESOC European Security Operations Centre
 ESP En-route Spacing (Program)
 ESP European Safety Programme for ATM (Plan européen pour la sécurité de l'ATM)
 ESP+ European Safety Programme Plus
 ESPOSA Efficient Systems and Propulsion for Small Aircraft
 Page 167
 EUROCONTROL AIRIAL
 Acronym Full form
 ESPRIT European Strategic Programme for Research and development in Information Technology
 ESR European Staff Requirement (A 400M)
 ESRA EUROCONTROL Statistical Reference Area (Zone de référence statistique EUROCONTROL)
 ESRC EAD Service and Royalty Charging sub-group
 ESRI Environmental Systems Research Institute
 ESRS EUROCONTROL Standard Document for Radar Surveillance in En-Route and Major Terminal Area
 ESs End Systems
 ESS Epc Software Server
 ESSAP European Strategic Safety Action Plan
 ESSI European Strategic Safety Initiative
 ESSI European Single Sky Implementation (now replaced by ESSIP)
 ESSIP European Single Sky Implementation (mechanism / documents) (replaces ECIP)
 ESSIP/LSSIP
 mechanism
 European/Local Single Sky Implementation (mechanism)
 ESSP European Satellite Services Provider
 EST Eastern Standard Time, UTC -5h. (USA)
 EST Estimate/ICAO Estimated Message
 EST ATC Estimate
 EST ESTimate(d), boundary ESTimate message
 EST Estimate message designator
 EST Boundary Estimate Message
 ESTB EGNOS System Test Bed
 ESTEC European Space Technology and Research Centre
 ESTEC ESA European Space Research and Technology Centre
 ESTEEM Elaboration of a Strategy for the Transition from EATCHIP phase III to the EATMS
 ESTI European Telecommunications Standards Institute
 ESUG European SIMMOD User Group
 ESUP Eurocat Support System
 ESV Environment SerVer
 ESVA Enhanced Successive Visual Approach
 ET Error Type
 ET Event Tree
 ET Executive Task
 ET (Shuttle) External Tank
 Page 168
 EUROCONTROL AIRIAL
 Acronym Full form
 ETA Estimated Time of Arrival / Estimating Arrival
 ETA Extract, Transfer and Load
 ETA Even Tree Analysis
 ETB End of Transmitted Block
 ETCAS Enhanced Traffic alert and Collision Avoidance System
 ETD Estimated Time of Departure
 ETE Estimated Time of Entry
 ETF European Transport Workers Federation
 ETFDD Electronic Tabular Flight Data Display
 ETFDM Electronic Tabular Flight Data Message
 ETFMS Enhanced Tactical Flow Management System
 ETFMS Enhanced Technical Flow Management Service
 ETFMS/DDS ETFMS Data Distribution System
 ETG European GNSS Tripartite Group (European Community, EUROCONTROL, European
 ETI EAD Terminal Interface (part of ECI)
 ETIC EUROCONTROL Test Tool For Intercentre Communication
 ETKR European Tracker Service
 ETL Extended Track Label
 ETL Estimated Time Of Leaving (of aircraft into AIRSPACE_VOLUME)
 ETMA Extended Terminal Manoeuvring Area
 ETMS Enhanced Air Traffic Management System
 ETNA Extranet for National Administrations (Extranet destiné aux Administrations nationales)
 ETO Estimated Time Over (a significant point)
 eTOD electronic Terrain and Obstacle Data
 ETOPS Extended Range Twin Engined Operations
 ETOT Estimated Take-Off Time (Heure estimée de décollage)
 ETOX Estimated Time Overhead Exchange
 ETP équivalent temps plein (full-time equivalent - FTE)
 ETR Runway Entry Point
 ETR ETSI Technical Report
 ETRAS Easy Transported Radar Analysis System
 ETRC European Travel Retail Council
 ETREM EUROCONTROL Technical Requirements Model (EAS)
 ETRF European Terrestrial Reference Frame
 Page 169
 EUROCONTROL AIRIAL
 Acronym Full form
 ETRS European Terrestrial Reference System
 ETS Early Termination of Service (ETS) scheme - Régime de cessation anticipée des fonctions (ETS)
 ETS European Telecommunications Standard
 ETSI European Telecommunication Standards Institute
 ETSO European Technical Standard Order
 ETSSF ETS Support Facility
 ETSWAP Emissions Trading Scheme Workflow Automation Project
 ETT Environment Test Team
 ETTSG European TAAM Technical Sub-Group
 ETTT Estimated Time To Turnround
 ETV Environment and Trajectory Validation
 ETX Estimated Time Of Exit (of aircraft into AIRSPACE_VOLUME)
 EU Electronic Unit
 EU European Union (Union européenne - UE)
 EU APP EU Aviation Partnership Project
 EU ETS EU Emissions Trading System (système d'échange de quotas d'émission de l'UE - SEQE-UE)
 EU-ACA European Union Airport Coordinators Association (represent more than 120 airports throughout the European
 Union)
 EU-wide European Union Wide
 EUACA European Association of Airport Slot Coordinators
 EUCARF European Central Altitude Reservation Facility
 EUFALDA European Federation of Airline Dispatchers Association
 EUIR European Upper Information Region
 EUM Europe Mediterranean Air navigation Region (ICAO)
 EUMAAC European Military Aviation Authorities Conference
 EUMC European Union Military Committee
 Eumed Europe Mediterranean Air navigation Region (ICAO)
 EUMED Europe Mediterranean Air navigation Region (ICAO)
 EUMETNET European Meteorological Services Network
 EUMS European Union Military Staff
 EUNET European Unix NETwork
 EUNIS European Network Integration Study
 EUR European
 EUR ANP Air Navigation Plan in Europe (ICAO Region)
 Page 170
 EUROCONTROL AIRIAL
 Acronym Full form
 EUR ICAO European Region
 EUR Euro
 EUR Europe
 EUR ATN European ATN
 EUR AFTN/AFS GERAC Group on European Regional AFTN/AFS Implementation and Operation Coordination
 EUR ANP ICAO European Air Navigation Plan
 EUR RAN European Regional Air Navigation (Meeting)
 EUR Region European Region (ICAO)
 EUR-AFS European Aeronautical Fixed Service Group (ICAO)
 EUR-ANP European Air Navigation Plan (ICAO)
 EUR-FMG European Frequency Management Group (ICAO)
 EUR-RAN European Regional Air Navigation
 EUR/M Mediation Service (Service "Médiation")
 EUR/W Welfare Service (Service "Affaires sociales")
 EURAC European Air Chiefs
 EURACA European Air Carrier Assembly
 EURAM European Research in Advanced Materials = BRITE
 EURAMID European ATM Military Directors Conference / Conférence européenne des Directeurs militaires de la
 navigation aérienne
 EURAP European Regional ATS Packet Switching Network (DAKOS+CBN)
 EURATN European experimental Aeronautical Telecommunications Network = Réseau européen de
 télécommunications aéronautiques
 EURATN experimental ATN type data link in the EURet programme
 EUREF IAG Subcomission for Europe
 EURET European Research for Transport (European Communities) ; Specific Resource and Technological
 Development Programme in the Field of Transport
 EURO EUROCONTROL
 Euro 88 States and Regions in the CRCO Are in 1988
 EURO/5-States RSG EUROCONTROL/5-States Route Structure Group
 EUROAT EUROCONTROL Specification for harmonized Rules for Operational Air Traffic under Instrument Flight Rules
 (IFR) inside controlled Airspace of the ECAC Area
 EUROBIT EUROpean association of manufacturers of Business machines & Information Technology
 EUROCAE European Organisation for Civil Aviation Equipment (Organisation européenne pour l'équipement de l'aviation
 civile)
 EUROCONTROL European Organisation for the Safety of Air Navigation (Organisation européenne pour la sécurité de la
 navigation aérienne)
 Page 171
 EUROCONTROL AIRIAL
 Acronym Full form
 EUROCONTROL European Organisation for the Safety of Air Navigation
 EUROMED Euro-Mediterranean Partnership (Partenariat euro-méditerranéen) (Algeria, Egypt, Israel, Jordan, Lebanon,
 Morocco, the Palestinian Authority, Syria, Tunisia, and Turkey)
 EUROPILOTE European Organisation of Airline Pilots Associations
 EUROSIM EUROCONTROL Simulator at the Institute of Air Navigation Services
 EUROSIM advanced autonomous atc training work station
 EUROSS EUROCONTROL Routine Observation Safety Survey
 EUROSTAT Statistical Office of the European Communities
 EUTELSAT European Telecommunications Satellite Organisation
 EUUP European Update airspace Use Plan
 EV EVery
 EV Earned Value
 EVA Enhanced Video Adapter
 EVA Enhanced Visual Acquisition
 EVAC EVACuation
 EVAIR EUROCONTROL Voluntary ATM Incident Reporting (system) / mécanisme EUROCONTROL de notification
 spontanée des incidents liés à l'ATM
 EVALINK Évaluation des services par liaison de données
 EVAS EATMS Validation Strategy (Stratégie de validation de l'EATMS)
 EVC Enhanced Video Control
 EVCA European Venture Capital Association
 EVITA European Crisis Visualization Interactive Tool for ATFCM
 EVP EATMP Validation Project (formerly C3T)
 EVP European Validation Platform
 EVP/CORA EATMP Validation Platform for CORA
 EVS Evaluation System (ODS)
 EVS Exploitation-Vacation-Sujétion
 EVS Enhanced Visual (or Vision) System
 EWA Error Warning Area
 EWA1 Error/Warning Area [1]
 EWA2 Error/Warning Area [2]
 EWAN EAD WAN
 EWAN EGNOS Wide Area Network (Réseau étendu de transmission d'EGNOS)
 EWBS EATCHIP Work Breakdown Structure
 EWC Enhanced Working Conditions
 Page 172
 EUROCONTROL AIRIAL
 Acronym Full form
 EWG Executive Working Group
 EWIS Electrical Wiring Interconnection Systems
 EWOS European Workshop on Open Systems
 EWP Enhanced Working Position
 EWP EATMP Work Programme
 EWP EATCHIP Work Programme
 EWPA EATCHIP Work Programme Adaptation
 EWPD EATMP Work Programme Document
 EWPD Eatchip Work Package Definition
 EWPD EATCHIP Work Programme Document
 EWS Early Warning System
 EWS Experimental Workstation Simulator
 EWST Estimated Wait Stand Time
 EWT EATMS Working Team (CSD)
 Ex Exercises
 EX Excluded
 EX EXecute (the previously entered command sequence)
 ex GDR ex German Democratic Republic
 EXAC EUROCONTROL Exchange and Civil-Military ATM Information and Coordination
 EXC EXCept
 EXC Executive Controller
 EXCDS Extended Computer Display System (Canada)
 EXCEL Microsoft Excel
 EXCOND ATFM Exceptional Condition Notification Message
 EXEC EXECute
 EXEC EXECutive
 EXER EXERcise(s)
 EXIT Estimated Taxi In Time
 EXM Exempt
 EXOT Estimated Taxi Out Time
 EXP Expected
 EXP EXPect(ed), EXPecting (status)
 EXPLT Extrapolate, Extrapolation
 EXSPEC Exercise Specification
 Page 173
 EUROCONTROL AIRIAL
 Acronym Full form
 EXTD EXTenD(ing)
 extra EUR Regional AIS System Centre outside the ICAO EUR region
 F France
 F Degrees Fahrenheit (°F)
 f frequency
 F Fixed (Relating to marine lights)
 F&CM Flow And Capacity Management
 F&E Facilities and Equipment Program (FAA)
 F.435 ITU-T Recommendation F.435 on EDI Messaging Services
 F.440 ITU-T Recommendations F.440 on Voice Messaging
 F/D Flight Director
 F/G Foreground
 F/NAV GALILEO's Freely Accessible Navigation Message Type
 F1 Framing Pulse 1
 F1 keyboard function key (1)
 F15 Field 15 of flight plan
 F18 Field 18 of Flight Plan
 F2 Framing Pulse 2
 F2WGO Free Flight Working Group � Operational
 FA Fix to an Altitude
 FA Course from a Fix to an Altitude (ARINC 424 Path Terminator)
 FA Final Acceptance
 FA1 Fdm Area 1
 FA2 Fdm Area 2
 FAA Federal Aviation Administration (Administration fédérale de l'aviation) USA (ICAO 7910/63)
 FAA-STD-042 National Airspace System Open System Interconnection Naming and Addressing (ISO Standards for Open
 Systems Interconnection and Data Communication published by ISO, International Standards Organisation).
 FAAIP FABEC ATFCM/ASM Implementation Project
 FAAS Flight Plan Assessment and Alert System (Système d'évaluation des plans de vol et d'alerte)
 FAATC FAA Test Centre
 FAB Functional Airspace Block (bloc d'espace aérien fonctionnel)
 FAB CE Functional Airspace Block Central Europe (Austria, Bosnia and Herzogovina, Czech Republic, Hungary,
 Slovakia and Slovenia)
 FABEC Functional Airspace Block Europe Central (bloc d'espace aérien fonctionnel Europe Central)
 FAC Flight Augmentation Computer
 Page 174
 EUROCONTROL AIRIAL
 Acronym Full form
 FAC FACilities
 FAC Final Approach Course (same as IS)
 FACC Feature and Attribute Coding Catalogue
 FACET Fast ACC Capacity Evaluation Tool
 FACF Final Approach Course Fix
 Facil Facilitation
 FACT Future Communication Architecture to support Intra-Centre Communications between Air Traffic Management
 System Components based on TCP/IP
 FACTOR Development of Functional Concepts from the EATMS Operational Requirements
 FACTS Future Area Control Tools Support
 FADE Federal Aviation Administration's (FAA) Airline Data Exchange
 FADEC Full Authority Digital Engine Control
 FAF Final Approach Fix
 FAFEP Fans Front End Processor
 FAI Fédération Aéronautique Internationale (FR)
 FALBALA First Assessment of the operational Limitations, Benefits & Applicability
 FAM Fire Alarm Monitor
 FAM Flight Activation Monitoring
 FAML family leave (congé familial) (CHRONOTIME)
 FAN False Alarm Normaliser (radar)
 FAN FAN (marker) (Navigational facility)
 FANA Federal Air Navigation Authority (Russia)
 FANOMOS Flight track and Aircraft NOise MOnitoring System (RMCDE)
 FANS Future Air Navigation Systems (ICAO)
 FANS-1 Future Air Navigation Systems 1, an initial operational datalink package for the South Pacific
 FANS-A Future Air Navigation Systems A, an initial operational datalink package for AIRBUS aircraft
 FANSTIC Future Air Traffic Management, New Systems, and Technologies Integration in Cockpit
 FAP Future ATM Profile (simulation Brétigny) / Profil ATM futur
 FAP Frequency Allocation Panel
 FAP Final Approach Point
 FAQ Frequently Asked Questions
 FAR Federal Aviation Regulation
 FAR False Acceptance Rate
 FAR False Alarm Rate
 Page 175
 EUROCONTROL AIRIAL
 Acronym Full form
 FARADS Feasibility of an ACAS RA Downlink Study (Étude de faisabilité sur la transmission par liaison descendante
 des RA de l'ACAS)
 FARAWAY Fusion of Radar and ADS using Two-Way Datalink
 FARE Fallback ACT and FDPS Recovery Enhancement
 FAROA Final Approach and Runway Occupancy Awareness
 FAROS Final Approach Runway Occupancy Signal
 FAS Flight Plan and Airport Slot Consistency Service
 FAS Final Approach Segment
 FAS Flight level Allocation System
 FAS Flexible Access System
 FASID Facilities And Services Implementation Document (ICAO)
 FAST Full Autonomous Separation Transfer
 FASTER Future AO-ATM-Airports Synergy Towards Enhanced Operations
 FASTI First ATC Support Tools Implementation
 FASVAL Value of the parameter FAS
 FAT Force Aérienne Tactique (FR)
 FAT First-of-class Acceptance Test
 FAT Factory Acceptance Testing
 FAT File Allocation Table
 FATA Force Aérienne Tactique Alliée (OTAN) / Allied Tactical Air Force (=ATAF)
 FATA Rosaviatsia (Russian Federal Air Transport Agency)
 FATAC French Air Force Tactical Air Command
 FATCA Federal Air Traffic Control Authority (Yugoslavia)
 FATMI Finnish Air Traffic Management Integration
 FATO Rosavianadzor (Russian Federal Air Transport Oversight organisation)
 FATO Final Approach & Take-Off area
 FATUREC Federation of Air Transport User Representatives in the EEC
 FAVES FAA's Administrative Voice Enterprise Services
 FAWP Final Approach Waypoint
 FAX FAcsimile transmission
 FB FallBack
 FB Fast Byte
 FBL light, as adjective qualifying icing, turbulence, interference
 FBO Fixed Base Operator
 Page 176
 EUROCONTROL AIRIAL
 Acronym Full form
 FBS FallBack Switch (CSS)
 FBS Fall-Back System
 FBT Forecast Business Trajectory
 FBU Flight Briefing Unit
 FBW Fly-By-Wire
 FBZ FPL Buffer Zone
 FC Course from a Fix to a Distance (ARINC 424 Path Terminator)
 FC Frequency Change
 FC Formalised Clearances
 FC Feeder Controller
 FC Funnel Cloud (Tornado, Waterspout)
 FC Flight Crew
 FC Frame Control
 FCA Funtional Configuration Audit (MAS - ODS)
 FCAA Finnish Civil Aviation Authority
 FCB File Control Block
 FCB Frequency Coordination Board
 FCC Federal Communications Commission
 FCC Flow Coordination Cell
 FCC Flight Control Computer
 FCCS Flight Control Computer System
 FCD Flow Control Decision
 FCDS Frequency Channel and Distribution System
 FCE Flow Control Execution
 FCG Frequency Coordination Group
 FCG Financial Consultation Group (AFG)
 FCI Future Communication Infrastructure
 FCLTP Flight Crew Licensing and Training Panel (ICAO)
 FCM Flow and Capacity Management
 FCM Flight Confirmation Message (Message de confirmation de vol)
 FCNP Fire Control and Navigation Panel
 FCO Future Concepts (EATCHIP domain)
 FCO Flow and Capacity Operational grades
 FCOM Flight Crew Operating Manual
 Page 177
 EUROCONTROL AIRIAL
 Acronym Full form
 FCOT Future Concepts Team
 FCR Flow Control Request
 FCS Flight Conflict Store
 FCS Future Communication System
 FCS Flight Control Computer (Eurofighter)
 FCS Frame Check Sequence (RMCDE)
 FCS Frame Check Sequence
 FCS Flight Control System
 FCS Future Communication Study
 FCST ForeCaST
 FCTL Flow Control
 FCTM Flight Crew Training Manual
 FCU Flight Control Unit
 FCWOS Federal Contract Weather Observing Site
 Fd Doppler Frequency
 FD Flight Data position
 FD Flight Data
 FD Course from a Fix to a DME Distance (ARINC 424 Path Terminator)
 FD Flight Data assistant role
 FD Flight Director
 FDA Flight Data Assistant (Assistant "données de vol")
 FDB Full Data Block
 FDCO Flight Data Communication Object
 FDD Frequency Division Duplex
 FDD Flexible (Floppy) Disc Drive
 FDD Flight Data Distribution
 FDDI Fiber Distributed Data Interface (LAN - RMCDE / MAS)
 FDDI Fibre Distributed Data Interface
 FDDI Fiberoptical Digital Data Interchange
 FDE Flight Data Exchange
 FDE Failure Detection and Exclusion
 FDE Fault Detection Exclusion
 FDE ICD Flight Data Exchange Interface Control Document
 FDE-ICD-P1 Flight Data Exchange Interface Control Document-Part 1
 Page 178
 EUROCONTROL AIRIAL
 Acronym Full form
 FDETXTF Flight Data Exchange Task Force (Équipe spéciale "Échange des données de vol")
 FDFM Flight Data & Flow Management (Group)
 FDFM Flight Data and Flow Management
 FDFMG Flight Data and Flow Management Group (Groupe "Données de vol et gestion des courants de trafic aérien")
 FDG Flight plan Data Generator
 FDG Flight Data Group (MAS)
 FDI FAA Departure Information
 FDI2 ISO/IEC Standard for MHS Use of the DIrectory
 FDM Flight Data Message (N-FDPS)
 FDM Frequency Division Multiplexing
 FDM Flight Data Management
 FDMA Frequency Division Multiple Access
 FDMAS Flight Data Management Automated System (It. ATFM)
 FDMD Flight Data Management and Distribution
 FDMP Flight Data Manager Publisher (Flight Object concept)
 FDMS Flight Data Management System
 FDO Fdps Data Operator
 FDO Flight Data Operations/Operator
 FDOD Flight Data Operations Division (Old name, see OPSD)
 FDP Flight Duty Period
 FDP Flight Data Processing (Traitement automatique des données de vol)
 FDP Flight Data Processing / Flight-plan Data Processor
 FDPA Flight Data Processing Area
 FDPD Flight Data Processing and Distribution
 FDPE-TF Flight Plan Related Data Exchange Task Force
 FDPI Flight Data Processing Inter-operability (formerly eFDP - European Flight Data Processing System)
 FdpListCO FDPLIST Communication Object
 FDPS Flight Data Processing System / Système de traitement des données de vol
 FDR Flight Data Record
 FDR Flight Data Recorder
 FDS Flight Data Section
 FDS Flight Data Specialist
 FDS Fire Detector System
 FDSU Flight Data Storage Unit
 Page 179
 EUROCONTROL AIRIAL
 Acronym Full form
 FDSUP Flight Data SUPervisor
 FDT Formal Description Techniques
 FDX Full DupleX
 FE Framing Error
 FE tones injected by the Far End switch
 FE Functional Earth (electrical connection)
 FE Flight Efficiency
 FEA/FCA Flow Evaluation Area (FEA) / Flow Constrained Area (FEA)
 FEAST First European Air Traffic Controller Selection Test (Première batterie européenne de tests de sélection des
 contrôleurs de la circulation aérienne)
 FEATS Future European Air Traffic Management System Concept (Concept du futur dispositif de gestion du trafic
 aérien dans la Région Europe)
 FEB FEBruary
 FEC Forward Error Control
 FEC Forward Error Correction
 FECN Forward Error Congestion Notification
 FED Fonds européen de développement
 FEDCAD Federal Civil Aviation Department (Republic of Srpska, Bosnia and Herzegovina)
 FEDER Fonds européen de développement régional (= ERDF)
 FEI Flight Efficiency Initiative
 FEO Fund Executive Officer (Administrateur général du Fonds)
 FEP Flight Efficiency Plan
 FEP Front-End Processor
 FES Fixed Earth Station
 FESG Forecasting and Economic Support Group (CAEP)
 FEV1/FVC Forced Expiratory Volume (in one second) / Forced Vital Capacity
 FEVP Fallback Equipment Verification Procedure
 FEW Flight Economical Weight
 FF Form Feed
 FF-ICE Flight and Flow Information for a Collaborative Environment
 FFA Functional Failure Analysis (ODS)
 FFAP FAA Free Flight Action Plan
 FFAS Free Flight Airspace
 FFI Final Factory Inspection (CBN - CNG)
 FFM Free Flight Mode
 Page 180
 EUROCONTROL AIRIAL
 Acronym Full form
 FFM Frankfurt/Main
 FFP Filed Flight Plan
 FFPE Fédération de la Fonction Publique Européenne (trade union)
 FFPG FABs Focal Point Group (groupe de coordination des FAB) (Platform)
 FFR Fire Fighting
 FFS Führungs und Förderungs System (DE) (DFS) / Leadership and promotion system
 FFSC Free Flight Select Committee (RTCA)
 FFT Free Flight Track
 FFT Fixed Field Transponder
 FFT Fast Fourier Transform
 FFTF Future Functions Task Force (4-States/EUROCONTROL)
 FFU Fire Fighting Unit
 FG Focus Group
 FG FoG
 FG Functional Group
 FGA Future Graphics Array (= Enhanced VGA)
 FGCS Flight Guidance Control System
 FHA Functional Hazard Assessment
 FHSS Frequency Hopping Spread Spectrum
 FHT File Handle Table
 FI Finland (ISO Country Code)
 FIAT First Installed Article Test
 FIB Forward Information Base
 FIB Forwarding Information Base
 FIC Flight Information Centre
 FIC Frequency Intercom
 FID (international) Federation for Information & Documentation
 FIDS (Swedish) Flight Information Display System
 Field Fields Containing Data Items
 FIFO First In First Out
 FIFO First in, First out
 FIFOR Flight (Weather) FORecast
 FIFU Financial Information for Users (Informations financières destinées aux usagers)
 FIFU/TF Task Force on Financial Information to Users
 Page 181
 EUROCONTROL AIRIAL
 Acronym Full form
 FIG Figure (N-FDPS)
 FILTIM Date and Timestamp of original Message
 FIM Financial Management Unit (Unité "Gestion financière")
 FIM Flight deck interval management
 FIM Flight Information Message (N-FDPS)
 FIN TCP close connection message
 FIN Fingerprint Identification Number (US)
 FIN Financial Services
 FIN Finland
 FINC job-seeking (recherche d'un emploi) (CHRONOTIME)
 FIPS Flight Increase Process
 FIPS Federal Information Processing Standards (USA)
 FIR Flight Information Region (région d'information de vol)
 FIRO-B Fundamental Interpersonal Relations Orientation - Behaviour
 FIRST Flexible Independent Radar Skill Trainer (MAS)
 FIS Field Instruction System
 FIS Financial Information System
 FIS Flight Information Service
 FIS-B Flight Information Service - Broadcast
 FISA Flight Information Service - Automated
 FISC Flight Information Services Communications
 FISO Flight Information Service Officer
 FISOL Flight Information Service Officer Licence
 FIT Factory Inspection Test
 FIT FANS Interoperability Team
 FIT First Transfer
 FIT Flight Integration Task
 FIT Factory Inspection Test(s) (ing)
 FIT Flight Plan Input Terminal
 FITAMS Flight Trials of ATN and Mode S
 FIW Flight Input (Information) Workstation (IFPS)
 FIX Fixpoint
 FIX point at which a flight plan HOLD acts. (Selected from list)
 FIX Fixed FIM (N-FDPS)
 Page 182
 EUROCONTROL AIRIAL
 Acronym Full form
 FIXM Flight Information Exchange Model
 FKE Führungskräfte Entwicklung in der DFS (DE) / Management development programme
 FL Forward Link
 FL Flight Level, unit of altitude (expressed in 100's of feet)
 FL300 Flight Level 300
 FL350 Flight Level 350
 FLAG 5-LIVES Advisory Group
 FLARM FLARM (trade mark = "Flight Alarm", commercial low-cost collision-avoidance system)
 FLAS Flight Level Allocation Scheme
 FLAS Flight Level Allocation System / Scheme
 FLB Fallback (N-FDPS)
 FLC Flight Level Cap
 FLD FLoppy Disc drive
 FLD FieLD
 FLFIG Flight Level FIGures
 FLG FLashinG
 FLID Flight Identification
 Flight ID Flight Identity (callsign used in flight)
 FLINT Flight Intent Trials
 FLIP Flight Information Publication
 FLIPCY Flight Plan Consistency
 FLIPINT Flight Path Intent
 FLIR Forward Looking Infra-Red
 FLIRECP Flight Recorder Panel
 FLIRECP Flight Recorder Panel (ICAO)
 FLMPTS Future Land Mobile Public Telecommunications Systems
 FLO Flow meetings
 FLO ATS/ATFM Coordination meeting (ICAO)
 FLOE ICAO ATS/ATFM Coordination (Europe East)
 FLOEast Informal Flow control Meeting - Europe East (ICAO/EANPG)
 FLOPC Flight Operations Performance Committee
 FLOS Flight Level Orientation Scheme
 FLOW FLOW controller
 FLOW Informal ATS / ATFM Coordination Meeting - Europe West
 Page 183
 EUROCONTROL AIRIAL
 Acronym Full form
 FLOWest Informal Flow control Meeting - Europe West (ICAO/EANPG)
 FLOWTAM NOTAM on ATFM Measures
 FLR FLaRes
 FLS Flight Suspension Message (Message de suspension de vol)
 FLT Flight
 FLT LEG Flight Leg (N-FDPS)
 FLT/PLN Flight Plan
 FLTAB Flight Level Table
 FLTCK FLighT ChecK
 FLTLEG FLighT LEG
 FLTP Flexible Luxembourg Training Platform
 FLUC FLUCtuating(ed)(ion)
 FLW FoLloW(s), FoLloWing
 FLY FLY(ing)
 FM FroM ...
 FM Frequency Management
 FM Flow Manager
 FM Course from a Fix to a Manual Termination (ARINC 424 Path Terminator)
 FM Frequency Modulation
 FMAQ Flight Management Attitudes Questionnaire
 FMC Flight Management Computer / Control
 FMCG Flow Management Coordination Group
 FMCS Flight Management Computer System
 FMEA Failure Mode Effects Analysis
 FMECA Failure Modes, Effects and Criticality Analysis
 FMG Frequency Management Group
 FMG Flow Management Group (ICAO)
 FMGC Flight Management and Guidance Computer
 FMGES Flight Management Guidance Envelope System (Airbus)
 FMGS Flight Management and Guidance System
 FMI Fonds monétaire international = International Monetary Fund (=IMF)
 FMO Flow Management Operation
 FMP Flow Management Position (Poste de gestion des courants de trafic)
 FMPG Flow Management Planning Group
 Page 184
 EUROCONTROL AIRIAL
 Acronym Full form
 FmRgt Fernmelderegiment (DE)
 FMS Flow Management System
 FMS Facility Management Service
 FMS Flow Management Services
 FMS Flexible Manufacturing System
 FMS Flight Management System
 FMTP Flight Message Transfer Protocol (Protocole de transfert des messages de vol)
 FMU Flight Management Unit
 FN Flight Notification(s)
 FN Format Number
 FN False Negative
 FNA FiNal Approach
 FNM Flight Notification Message
 FNM Flow Notification Message (Message de notification de courant de trafic)
 FNM Flugsicherung Niederlassung Maastricht (DFS)
 FNPT Flight and Navigation Procedure Trainer
 FNS FREQUENTIS Network System
 FNS Federal NOTAM System (U.S.)
 FO Flight Object
 FOBN Flight Operations Briefing Note
 FOC Flight Operations Control
 FOC Final Operation Capability
 FOC Full Operational Capability
 FOC/WOC Flight /Wing Operations Centre
 FOCA Floor of Controlled Airspace
 FOCA Federal Office of Civil Aviation
 FOCS Flow Optimisation Concept Scenario
 FOCUS Futura Posición del Controlador para UCS SACTA (ES)
 FOD Foreign Object Damage
 FOD Foreign Object Debris
 FOG Fibre Optic Gyro
 FOHE Fuel Oil Heat Exchanger
 FOIPS Flight Object Interoperability Proposed Standard (Projet de norme d'interopérabilité pour l'échange des
 données relatives aux objets de vol)
 Page 185
 EUROCONTROL AIRIAL
 Acronym Full form
 FOM Flight Object Manager (iTEC)
 FOM Figure of Merit (ICAO - ADS)
 FOQA Flight Operations Quality Assurance
 FOR-DEC Facts, Options, Risks and Benefits, Decision, Execution and Check
 FORC FMD Ops Room Contingency
 FORM training (formation) (CHRONOTIME)
 FORTRAN FORmula TRANslation
 FOS Flight Object Servers
 FOU Frequency of Use (CPDLC Messages)
 Four-state BFWG Four-State Budgetary and Financial working Group
 FP Focal Point
 FP False Positive
 FP Framework Programme (of the European Commission)
 FP Flight Plan
 FP Flight Prediction
 FP 5 Fifth Framework Programme of the European Community for Research, Technological Development and
 Demonstration
 FP6 Sixth Framework Programme
 FP7 Seventh Framework Programme
 FPA Flight Plan Activation
 FPA False Plot Analysis
 FPAP Flight Path Alignment Point
 FPB Flight Progress Board
 FPC Flight Planning Centre
 FPCP Flight Path Control Point
 FPD Flight Plan Data
 FPDE Flight plan-related data exchange
 FPDE-TF Flight Plan Data Exchange Task Force
 FPDPS Front Panel Data Ports
 FPDS Flight Plan Data Section
 FPF Flight Plan Fallback
 FPFS First Planned First Served
 FPGM Flight Plan Generated Message (Message généré par plan de vol)
 FPH Flight Plan History
 Page 186
 EUROCONTROL AIRIAL
 Acronym Full form
 FPL Flight Plan
 FPL Full-Performance Level (US)
 FPL Filed Flight PLan (message type designator)
 FPL (Filed) Flight Plan
 FPL BRT Flight Plan Bright (N-FDPS)
 FPL EDIT Flight Plan Edit (N-FDPS)
 FPLA Flight Plan Handling Applications Section (Section « Applications de traitement des plans de vol »)
 FPLA Flight Plan Application Section
 FPLA Field Programmable Logic Array
 FPLMTS Future Public Land Mobile Telecommunications System
 FPLR Flight Plan Route
 FPLSG (ICAO) Flight Plan Study Group (Groupe d'étude sur les plans de vol)
 FPM Feet Per Minute
 FPM Flight Plan Monitoring (N-FDPS)
 FPM Flight Position Monitor
 FPM Flight Plan Message
 FPM Flight Path Monitor (PATs)
 FPM Flight Plan Management
 FPM Flight Progress Message
 FPO Flight Plan Operations (N-FDPS)
 FPO Flight Plan Office
 FPP Flight Plan Processing
 FPPS Flight Plan Processing System
 FPPU Flight Planning and Flight Progress Updating
 FPR Flight Plan Route
 FPR Flight Profile Restriction
 FPRDETF Flight Plan related Data Exchange Task Force
 FPS Flight Progress Strip
 FPS Functional Performance Specification (EATCHIP)
 FPS Flight Progress Strip(s)
 FPS Flight Plan Server (MADAP)
 FPT Flight Plan Terminal
 FPV flight path vector
 FPWO Flight Plan Work Station Operator (IFPS)
 Page 187
 EUROCONTROL AIRIAL
 Acronym Full form
 FPZ Flight Path Zone (ODID)
 FQM Flight Plan Query Message
 FQR Formal Qualification Review
 FQR Factory Qualification Review
 FQR Flight plan Query Reply
 FQT Formal Qualification Testing
 FR Fuel Remaining
 FR Financial Regulations of the Agency (Règlement financier de l'Agence)
 FR Flight Route
 FR Frame Relay
 FR France (ISO Country Code)
 FRA Free Route Airspace (espace aérien à itinéraire libre)
 FRA Failure Reporting and Analysis (ODS)
 FRAC Final Review And Comment
 FRAC Free Route Airspace Concept (EUROCONTROL)
 FRAL Free Route Airspace Lisboa (FIR)
 FRAM Free Route Airspace Maastricht
 FRAMaK Free Route Airspace Maastricht and Karlsruhe
 FrameAPS Frame Maker Aeronautical Publishing System
 FRAP Free Route Airspace Project
 FRAP5 5th Free Route Airspace Project
 FRAS Free Route Airspace Sweden
 FRB Failure Review Board (ODS)
 FRCP Full Remote Control Panel (RBP)
 FREE FREE the pssr for reallocation
 FREER Free Route Experimental Encounter Resolution (Système expérimental de maintien autonome de la
 séparation sur routes libres)
 FREER Freer Flight
 FREGATE Filtre de Régulation Ergonomique de la Gestion des Secteurs & d'Anticipation des Tâches Excessives (FR)
 FREQ FREQuency
 Freq Next Sector frequency
 FRET Fast-time Roster Emulation Tool
 FRF Further Route of Flight
 FRG Federal Republic of Germany
 Page 188
 EUROCONTROL AIRIAL
 Acronym Full form
 FRI FRIday
 FRLC Flight crew reaction time to ATC line up clearance
 FRM Financial Resources Management Core Team
 FRMR Frame Reject
 FRMS Fatigue Risk Management System
 FRN Field Reference Number
 FRNG FiRiNG
 FROG Free flight Rocket Over Ground
 FROM_RIT From Reroute Issue Time
 FRONT (weather) FRONT
 FRONTEX European Agency for the Management of Operational Cooperation at the External Borders of the Member
 States of the EU
 FRP Federal Radionavigation Plan
 FRQ FReQuent
 FRR False Rejection Rate
 FRS Future Radio System
 FRS Functional Requirements Specifications (EATMS)
 FRT Fixed Radius Transition
 FRTT Flight crew reaction time to ATC take-off clearance
 FRUIT False Replies Unsynchronised to Interrogator Transmission
 FRUIT False Replies Un-synchronised In Time
 FS Flight Status (control bits)
 FS Foot Switch (VCS
 FS Flight plan Server
 FS File Separator
 FS Functional Specification
 FS Frame Status
 FS Flight Segment
 FS Fast Select
 FS Functional Statement (ICAO - ADS)
 FSA First System Activation (message)
 FSA First Stop Altitude
 FSC Flight Services Component
 FSD Full Scale Deflection
 Page 189
 EUROCONTROL AIRIAL
 Acronym Full form
 FSD TF Functional Specification Development Task Force (EASIE/MODE S)
 FSD Full Scale Development
 FSD Flow Situation Display
 FSDM Forecasting, Statistics and Data Management
 FSF Flight Safety Foundation
 FSH Flight Shift Message
 FSIX Flight Safety Information Exchange (ICAO)
 FSIX Flight Safety Information Exchange (ICAO)
 FSK FlugSicherungsKontrolldienst
 FSK Frequency Shift Keying
 FSL Full Stop Landing
 FSM Frequency Selection Module
 FSM Finite State Machine
 FSM Flight Schedule Monitor.
 FSM Frequency Shift Modulation
 FSP Flight Service Predictor
 FSP Flight Strip Printer
 FSPEC Field SPECification (ASTERIX), field of variable length, indicating which data fields are present in a record
 and in which order (see also Record)
 FSR Flight Suspension Request Message
 FSS Fixed Satellite Services
 FSS Flight Service Station (US)
 FSS Flight Service Station (VOLMET)
 FSSA Final State Selected Altitude
 FSSkt-A Flugsicherungssektor A (DE) / GAF sectors MAS UAC-Lippe Radar
 FSSktA FlugSicherung SeKTor-A
 FST FirST
 FSTD flight simulation training device
 FSTS Functional Standards Test Specifications
 FT Fault Tree
 FT FeeT (100 of which make 1 FL)
 FT Fast Track
 FT Filing Time
 ft feet / foot
 Page 190
 EUROCONTROL AIRIAL
 Acronym Full form
 FTA Fault Tree Analysis
 FTAM File Transfer and Access Method
 FTAM File Transfer Access and Management (protocol)
 FTAM File Transfer Access Management (protocol)
 FTC Fast Time Constant
 FTE Functional Time Equivalent
 FTE Flight Technical Error
 FTE Flight Technical Error
 FTE Full-Time Equivalent (équivalent temps plein - ETP)
 FTFM Filed Tactical Flight Model
 FTI FAA Telecommunications Infrastructure
 FTI FUA Temporary Instruction
 FTmn False Track Length Mean
 FTP File Transfer Protocol
 FTP Fictitious Threshold Point
 FTprob False Track Probability
 FTPS FTP Server System
 FTS Fast-Time Simulation System
 FTS Functional and Technical Specification
 FTsd False Track Length Standard Deviation
 FTT Flight Test Team
 FTT Flight Technical Tolerance
 FTTC Fiber to the Curb
 FTTH Fiber to the Home
 FTTN Fiber to the Node
 FU smoke (FUme)
 FUA Flexible Use of Airspace (Utilisation flexible de l'espace aérien)
 FUAG Flexible Use of Airspace Group (sub-group of APT). See FUSG
 FUBU Functional Budget
 FUCO Functional cost base
 FUCOZOC Fuel Consumption Estimator in a ZOC
 FUG Feast User Group
 FUI Flight Plan User Interface
 FUM Flight Update Message
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 Acronym Full form
 FUSE Frequency Usage analysis in Europe
 FUSE Frequency Utilisation in Europe (CMIC)
 FUSG Flexible Use of Airspace Sub-Group (Sub-Group of ANT)
 FUT Frequency Usage Transparency
 FUT Future
 FUT FCO Future Concepts
 FVHF Future VHF System Study
 FVK FlugVerkehrsKontrolle
 FVS Flight Verification System
 FW Functional Window
 FW Flow
 FWC Flight Warning Computer
 FWCS Flight Warning Computer System
 FX Field eXtension
 FX Field Extension Indicator (ASTERIX)
 FY Fiscal Year
 FYI For Your Information
 FYP Five-Year Programme (Programme quinquennal)
 FYROM Former Yugoslav Republic of Macedonia
 FZ FreeZing
 FZDZ FreeZing DriZzle
 FZFG FreeZing FoG
 FZRA FreeZing RAin
 G Group Training
 G General aviation flight type
 G-G Ground - Ground
 G-MARS GBAS Monitoring and Reference Station
 G-SDPD Ground - Surveillance Data Processing & Distribution
 G.114 ITU-T recommendation: One-way Transmission Time
 G.703 ITU-T recommendation for transmitting voice over digital carriers
 G.704 ITU-T recommendation: framing specification for G.703.
 G.711 ITU-T recommendation for PCM voice coding
 G.721 ITU-T cecommendation: Quantization Differential Encoding Pulse Code Modulation.
 G.728 ITU-T recommendation: LD-CELP voice coding
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 Acronym Full form
 G.729 ITU-T recommendation: CS-ACELP speech coding
 G.783 ITU-T recommendation: Characteristics of Synchronous Digital Hierarchy (SDH) Equipment Functional Blocks
 G.803 ITU-T recommendation: Architecture of transport networks based on the synchronous digital hierarchy (SDH)
 G.811 ITU-T recommendation: "Timing requirements of primary reference clocks"Defines requirements of Level 1
 Primary Reference Clock systems.
 G.822 ITU-T recommendation: Controlled slip rate objectives on an international digital connection
 G.825 ITU-T recommendation: The control of jitter and wander within digital networks which are based on the
 synchronous digital hierarchy (SDH)
 G/A Ground / Air
 G/A Ground-to-Air
 G/A/G Ground-to-Air & Air-to-Ground
 g/dl grammes per decilitre
 G/G Ground / Ground
 G/G Ground-to-Ground
 G/S Glideslope
 G/S Ground Speed
 G/T Gain over noise Temperature Ratio
 G/w Gateway
 G2G Gate-to-gate (De porte à porte)
 G3 Group 3 FAX
 GA General Aviation (Aviation générale)
 GA Ground Antenna
 GA CDR General Aviation Coded Departure Routes
 Ga-As Gallium-Arsenid
 GA-P General Aviation - Primary
 GA-S General Aviation - Secondary
 GAAP Generally Accepted Accounting Principles
 GAAS Generic Approach for ATM Systems
 GAASR Group of Air Navigation Service, Airport and Ground Aids Safety Regulators
 GAATS Gander Automated Air Traffic System
 GAC Ground-Air Communications
 GACC General Aviation Consultative Committee
 GACS Generic ATN Communication Service
 GACSP Global Aeronautical Communication Service Provider
 GAD Ground Accuracy Designator
 Page 193
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 Acronym Full form
 GADIRU GPS Air Data Inertial Reference Unit (A 400M)
 GADSS Global Aeronautical Distress and Safety System
 GAEM GPS Anomalous Event Monitor
 GAES Global Aviation Emissions Studies
 GAF German Air Force
 GAFLO German Air Force Liaison Officer
 GAFO German Air Force Office
 GAFOR General Aviation Forecast (Meteo)
 GAGAN GPS Aided Geo Augmented Navigation System
 GAI Guidance and Advisory Information
 GAIM Global Aeronautical Information Management
 GAIT Ground-Based Augmentation and Integrity Technique
 GALA Galileo Architecture Definition
 GALILEO European Satellite Positioning Constellation
 GAM Generic Airport Model
 GAM Graphics Access Method
 GAMA General Aviation Manufacturers Association
 GAME GEADGE/ADKAR Message Exchange
 GANDD GREPECAS Air Navigation Deficiencies Database
 GANIS Global Air Navigation Industry Symposium
 GANP ICAO Global Air Navigation Plan (plan mondial de navigation aérienne de l'OACI)
 GAP Global Action Plan
 GAPPRE Global Action Plan for the Prevention of Runway Excursions
 GARB GARBled
 GARP GBAS Approach Reference Point
 GARS German Aviation Research Society
 GARTEUR Group for Aeronautical Research and Technology in Europe
 GASC Global Aviation Satellite Communications System
 GASEL Generic ATFM Simulator Engine and Library
 GASP Global Aviation Safety Plan
 GASR Global Aviation Safety Roadmap
 GASR Group of Aerodrome Safety Regulators (Groupe des instances chargées de la réglementation de la sécurité
 sur les aérodromes)
 GAST-D GBAS Approach Service Type D - for operations to CAT III performance with specific aircraft integration
 assumptions
 Page 194
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 Acronym Full form
 GAT General Air Traffic (civil) (Circulation aérienne générale (CAG))
 GAT Group for ATM Training
 GAT Global Aviation Training
 GATE Group of ATM in the Eastern Part of the ICAO EUR Region, including Middle Asia
 GATELINK GATE aircraft terminating environment LINK
 GATM Global Air Traffic Management
 GATT General Agreement on Tariffs & Trade
 GAW Gallium Acoustic Wave
 GB Great Britain
 Gb Gigabyte
 GB United Kingdom (ISO Countries Codes)
 GBA Geostationary Broadcast Area
 GBAS Ground Based Augmentation System (Système de renforcement basé au sol)
 GBCC Ground-Based Control Complex
 GBDA Gestor de Base de Datos de Adaptación (ES) / Environment Data Base Manager
 GBLK Gat BLocKed ssr codes
 GBPS GigaBits Per Second
 GBWG Global Benchmarking Workgroup (Groupe de travail d'analyse comparative globale)
 GC Great Circle
 GC Graphics Controller
 GC Ground Controller
 GCA German Cockpit Association
 GCA Ground Controlled Approach
 GCA Government Quality Assurance
 GCAA General Civil Aviation Authority (United Arab Emirates)
 GCAS Ground-based Collision Avoidance System
 GCCS Geostationary Communications and Control Segment (WAAS)
 GCD Great Circle Distance
 GCE General Certificate of Education
 GCE General Condition of Employment
 GCID Ground Continuity and Integrity Designator
 GCL Graphical Information Category Cursor Line (EAS)
 GCO Ground Communications Outlet
 GCR Group Coded Recording
 Page 195
 EUROCONTROL AIRIAL
 Acronym Full form
 GCS Ground Control Segment
 GCSE General Certificate of Secondary Education
 GCST Group for Coordination of STAR (Studies, Tests and Applied Research)
 GCTA Gestion des Courants de Trafic Aérien (=ATFM)
 GCU Generator Control Unit
 GCWP Generic Controller Working Position
 GD General Display and Data Handling
 GDCA General Directorate for Civil Aviation (SP)
 GDCE Ground Data-Circuit terminating Equipment
 GDCE Ground Data Communications Equipment
 GDDM Graphical Data Display Manager
 GDF Graphic Definition Format
 GDI Graphical Device Interface
 GDL Graphics Definition Language
 GDLP Ground Data Link Processor
 GDM Graphical Information Category Dynamic Maps
 GDOP Geometric Dilution of Precision
 GDP Gross Domestic Product
 GDP General Data Processor
 GDP Ground Delay Program (US)
 GDPR EU General Data Protection Regulation
 GDPS GBAS Differential Positioning Service
 GDQF Graphical Display & Query Facility
 GDS Gestionnaire de Supervision (FR) (OCD)
 GDT Gas Discharge Tube
 GE Georgia (ISO Country Codes)
 GEADGE German Air Defence Ground Environment
 GEARS Generic Algorithmic Resolution Service
 GEC Groundtrack Equatorial Crossing
 GEDARC Groupe d'Experts de Détection Automatique et Resolution des conflits (SPACDAR)
 GEF General Economic Factor
 GEM Graphical Environment Manager
 GEMINUS Galileo European Multimodal Integrated Navigation User Service
 GEMS Generic Error-Modelling System
 Page 196
 EUROCONTROL AIRIAL
 Acronym Full form
 GEN General
 GENL (GNL) General
 GENOFIC General North Sea Flight Information Centre
 GENOVA General Overall Validation for ATM
 GENSPACE Generic Airspace and Environment for Common Use
 GEO GEO Point (point that is only defined by its geographical coordinates, ENV entity type, used in all CHMI)
 GEO Geostationary Orbit
 GEO GEOgraphic, or true
 GEOREF GEOgraphical REFerence (letters)
 GEORGI GEnder-biased ORGanisational Impairment
 GEOS Geo-Stationary Satellite
 GEOSTAR Multipurpose Satellite System Using Fixed Orbit Satellites (US)
 GEPNA Groupe Européen de Planification de la Navigation Aérienne (=EANPG) (ICAO)
 GERAC EANGP WG on Coordination of the Implementation & Operation of an Improved
 GERT Graphical Evaluation & Review Technique
 GES Ground Earth Station (ICAO - ADS)
 GET Generator
 GETALIS Sistema de Gestão de Tráfego Aéreo de Lisboa (PT) / Future Lisboa Air Traffic Management System
 GF Generic Functional
 GFART Greece, FYROM, Albania Real-Time Simulation
 GFC Generic Flow Control
 GFDI GNSS Fault Detection and Isolation
 GFI General Format Identifier
 GFM Graphical Information Category Fixed Maps
 GFP Generic Functional Protocol
 GFR Guaranteed Frame Rate
 GFSK Gaussian-filtered Frequency Shift Keying
 GFTC Generic Functional Transport Control
 GG Gat General (queue)
 GGC Ground-Ground Communications
 GGC-SG Ground-Ground Communication Subgroup
 GGCS Ground/Ground Communication System (ICAO)
 GGDC Ground/Ground Data Communications
 GGDCSG Ground/Ground Data Communications Sub-Group
 Page 197
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 Acronym Full form
 GGSNIF Ground/Ground Subnetwork Infrastructure
 GGT Gamma Glutamyl Transferase
 GGVCSG Ground/Ground Voice Communications Sub-Group
 GHG Greenhouse Gases
 GHMI Ground Human-Machine Interface (Interface homme-machine au sol)
 GHz Gigahertz
 GIACC Group on International Aviation and Climate Change
 GIANT GNSS Introduction in the AviatioN secTor
 GIB GPS Integrity Broadcast
 GIB Global Navigation Satellite System Integrity Broadcast
 GIC Geostationary Integrity Channel
 GIC Ground Integrity Channel
 GIC Geostationary Integrity Channel
 GIC GNSS Integrity Channel
 GICB Ground Initiated Comm B Protocol (Mode S)
 GIDAB General Information DAta Base
 GIEE Groupement d'intérêt économique européen
 GIF Graphics Interchange Format
 GIOVE Galileo In Orbit Validation Element
 GIP Government Industry Partnership
 GIPS General Image Processing System
 GIPS Giga Instructions Per Second
 GIPS Global Initial Positioning System
 GIPS Gestion Informatisee du Personel en Salle
 GIS Geostationary Integrity Service
 GIS Geographical Information System
 GISP Global Internet Service Provider
 GISS GALILEO Interim Support Structure
 GIT Generic IT
 GIVE Grid Ionospheric Vertical Error
 GJU GALILEO Joint Undertaking
 GLAN Geographic Longitude of Ascending Node
 GLB GLOBAL system
 GLD GLiDer
 Page 198
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 Acronym Full form
 GLLFC Graphical Low-Level Forecast
 GLONASS Global'naya Navigatsionnaya Sputnikovaya Sistema (RU) - GLObal NAvigation Satellite System
 GLOSS Global Sea Level Observing System
 GLS GNSS Landing System
 GLSU GPS Landing System Unit
 GLU GNSS Landing Unit
 GLU Ground Loading Unit (Eurofighter)
 GM Global Menu
 GM Greenwich Meridian
 GM Guidance Material
 Gmbh Gemeinschaft mit beschränkter Haftung (DE)
 GMBM Global Market-Based Measure
 GMC Ground Movement Control
 GMC Ground Movement Controller
 GMD General Meeting of Directors (Comité des Directeurs)
 GMDSS Global Maritime Distress & Safety System
 GMGCS Ground Movement Guidance and Control System
 GML Geography Markup Language
 GMP Ground Movement Planner
 GMR Ground Movement Radar
 GMS Ground Monitoring System
 GMS Gate Management System
 GMS Ground Movement Surveillance
 GMS Ground Monitoring Station
 GMSK Gaussian Minimum Shift Keying
 GMT Greenwich Mean Time
 GMTF Guidance Material Task Force (ECAC)
 GMU GPS (Height) Monitoring Unit
 GMV Grupo de Mecánica del Vuelo (ES)
 GN Global Network
 GNBL Gat non-BLocked ssr codes
 GNC Global Network Connect
 GNC Global NAVCOM (IATA/ICAO Conference)
 GND Ground Control service / facility
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 Acronym Full form
 GND Ground Level
 GND GrouND
 GNDCK GrouND ChecK
 GNE Gross Navigational Error
 GNI Ground Network Interface
 GNLS GNSS Navigation and Landing System
 GNLU GNSS Navigation and Landing Unit
 GNP Gross National Product
 GNS Satellite Navigation (EEC)
 GNS Global Navigation System
 GNSS Global Navigation Satellite System (système mondial de navigation par satellite)
 GNSS-EUR GNSS - European Applications Course
 GNSS1 First Generation GNSS
 GNSS2 Second Generation GNSS
 GNSSP Global Navigation Satellite System Panel (ICAO)
 GNSSU Global Navigation Satellite System Unit
 GNU GNSS Navigation Unit
 GOC Galileo Operating Company
 GOMS Goals, Operators, Methods, Selection (rules)
 GOS Grade of Service
 GosNIIAS Russian State Research Institute of Aviation Systems
 GOSPAR GPS Operational Control System Performance Analysis and Reporting
 GOTS Government Off-The Shelf
 GOTV GNSS Operational Test and Validaton
 GP Glide Path
 GP General Procurement
 GPA Glide Path Angle
 GPEA Groupe Permanent de l'Espace Aérien (FR)
 GPEEC Gestion de prévision des emplois, des effectifs et des compétences
 GPI Graphics Programming Interface
 GPI Ground Position Indicator
 GPIP Glide Path Interception Point
 GPIWG Glide Path Intercept Waypoint
 GPOSM Gat POSition Management
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 EUROCONTROL AIRIAL
 Acronym Full form
 GPRS General Packet Radio Service
 GPS Geographical Paging / Positioning System
 GPS Global Positioning System (système mondial de localisation)
 GPSCO General Plan Server Communication Object
 GPSS General Purpose Simulation System
 GPSSU GPS Sensor Unit
 GPSW GPS Wing (formerly the JPO)
 GPTP Guided Part-Task Practice
 GPU Ground Power Unit
 GPV GNSS Performance Validation
 GPW Ground Proximity Warning
 GPWS Ground Proximity Warning System
 GR hail
 GR Greece
 GRACE Geographical Association and Classification of Events
 GRADE Ground Return Area Digital Eliminator
 GRADU GRADUal(ly)
 GRAM GPS Receiver Application Module
 GRANAS Global Radio Navigation System (D)
 GRAS Global Remote Access Service
 GRAS Ground-based Regional Augmentation System
 GRASS GRASS landing area
 GRC-ITD Green Rotorcraft Integrated Technology Demonstrator
 GRD Aerodrome ground controller
 GREPECAS Caribbean/South American Regional Planning and Implementation Group
 GRF Global Reporting Format for Runway Surface Conditions
 GRH Gestion des ressources humaines
 GRI Group Repetition Interval
 GRID Meteo data in GRID point value form, in aeronautical meteo code
 GRIGRI Gestures, Recognition on Interactive Graphical radar Images
 GRM Graphical Route Modification
 GROBI Graphical Object Interface
 GROUP SIMUL Groupe Simulation
 GRRT Group rerouting tool
 Page 201
 EUROCONTROL AIRIAL
 Acronym Full form
 GRS GroB-Rundsicht Radar (DE)
 GRS Ground based Radio Station
 GRSS Global Runway Safety Symposium
 GRVL GRaVeL
 GrW Group Work
 GS Ground Stop (US)
 GS Glide Slope
 GS Ground Speed
 GS Graphical Station
 GS Guaranteed Service
 GS Ground Station
 GS Glideslope
 GSA Guided Skill Acquisition
 GSA European GNSS Agency (Agence du GNSS européen)
 GSA Ground Surveillance Application
 GSB Galileo Security Board
 GSC Gaining Stakeholder Commitment (EATM)
 GSC Global Signalling Channel
 GSCU Ground Station Control Unit
 GSE Ground Support Equipment
 GSE Ground Service Equipment
 GSFL Groupe d'experts 'Sélection, formation et licences du personnel ATS' / ATS Selection, Training and Licensing
 Panel (EUROCONTROL) (=STLP)
 GSG Governance Study Group/ Groupe d'étude sur la gouvernance
 GSIF Ground Station Identification Frame
 GSIMUL Guided Simulation
 Gsimul Group Simulation
 GSIO Gat Sector Input Operator
 GSM Groupe Spécial Mobile
 GSM Global System for Mobile communications
 GSM Graphical Information Category Scale Marking
 GSN Goal Structuring Notation
 GSNA Ground-Supported Navigation Advisory
 GSO Group of Senior Officials
 Page 202
 EUROCONTROL AIRIAL
 Acronym Full form
 GSO Geosynchronous Orbit
 GSOC German Space Operations Center (DLR - Deutsches Zentrum für Luft- und Raumfahrt)
 GSS Graphics System Software
 GST GALILEO System Time
 GSTB Galileo System Test Bed
 GT Ground Transmitter
 GT2 Ghost Track rate (radar standard)
 GTB General Tool Box
 GTBF (4 Etats) Groupe de travail budgétaire et financier / Four-State Budgetary and Financial Working Group
 GTC Gain / Time Control
 GTE Groupe tripartite européen
 GtG Gate-to-Gate (programme)
 GTID Group training - Instructor-dependent
 GTIS Ground-based Traffic Information System
 GTMD Group Training - Material-dependent
 GTO Geosynchronous Transfer Orbit
 GTP Groupe de travail "Pensions" / Pensions Working Group (= PWG)
 GTr Ghost Track Rate
 GTRC General Technical Requirements and Conditions
 GTRF Galileo Terrestrial Reference Frame
 GTS Global Telecommunications System
 GTVS Ground Transponder Verification System
 GUFI Globally Unique Flight Identifier
 GUH Get U Home (Eurofighter)
 GUI Graphical User Interface
 GUI Guidelines (EATCHIP/EATMP/EATM)
 GUIDE General User Interface Device (ODS)
 GUKOS State Department of Space Means
 GUS Geosynchronous Satellite Up-link Station
 GUST Galileo User Support Transport
 GUTMA Global UTM Association
 GV Group Validation
 GVAT Ground Vehicle ADS Transponder
 GVCSG Ground/Ground Voice Communications Sub-Group
 Page 203
 EUROCONTROL AIRIAL
 Acronym Full form
 GVT Group Validation Test
 GVTS Ground Vehicle Tracking System
 GWG GBAS Working Group
 GWL Graphical Information Category Weather Lines
 GWT Google Web Toolkit
 h Heading
 H Heavy
 H Hungary
 H Hour
 h Hour
 H Heading (N-FDPS)
 H-OFF-A Hand-Off Accept
 H-OFF-P Hand-Off Propose
 H.323 "Voice Over Ip" Standard
 H/ATM Head of ATM Training Unit
 H/HRS Head of Human Resources and Services (chef de la division "Ressources humaines et services de l'Agence")
 H/M/L High/Medium/Low (ATC Complexity)
 H/OFF/A Hand-OFF Accept
 H/OFF/P Hand-OFF Propose
 H/TD Head of Training Division
 H/W Hardware
 H16 Hours 16, Availability 16 hours/day, 7 days/week
 H24 Hours 24, Availability 24 hours/day, 7 days/week
 H2A Japanese Launch Vehicle
 HA HAndset
 HA Holding Pattern to an Altitude
 HA Holding to an Altitude (ARINC 424 Path Terminator)
 HA High Availability
 HAA Height Above Airport
 HAC Hamburg Assistant Controller
 HACO Hamburg - Coastal project
 HAD Human Aspects Development
 HADAMARD Multi-radar processing written in ADA
 HADES Help tool for Airspace Design EEC Studies (Outil d'aide à l'organisation de l'espace aérien)
 Page 204
 EUROCONTROL AIRIAL
 Acronym Full form
 HAE height above ellipsoid
 HAI Helicopter Association International
 HAL Horizontal Alert Limit
 HAL Human Assurance Level
 HAL Holding & Approach to Land procedure
 HALE High Altitude Long Endurance
 HALO High Altitude, Low Opening
 HALS / DTOP High Approach Landing System / Displaced Threshold Operations
 HAMMER High-level All-purpose Monitoring and Management Equipment for RADNET
 HAN HANnover sectors
 HANSA Hellenic Air Navigation National Supervisory Authority
 HARE Helping AMHS Roll-out in Europe
 HARP High Altitude Release Point
 HASP Houston Automatic Spooling Programme
 HAT Height Above Touchdown
 HAT Height Above Threshold
 HATR Hazardous Air Traffic Report
 HAW Horizontal Aid Window (ODID)
 HAZ Hazard
 HAZOPS Hazard and Operability Study
 HBN Hazard BeacoN
 HBS (multi-level) Hold Baggage Screening
 HBS Hotline Back-up System
 HC High Capacity
 HCA Human-Centred Automation
 HCAA Hellenic Civil Aviation Authority (GR)
 HCC Hamburg Coordinating Controller
 HCD Hard Copy Device
 HCI Human-Computer Interaction
 HCI Human-Computer Interface
 HCn High Capacity needs
 HCP Hard Copy Printer
 HCT Human-Computer Trust
 HCY Hard CopY
 Page 205
 EUROCONTROL AIRIAL
 Acronym Full form
 HD Harmonisation Documents
 HD Help Desk
 HDA Hard Disc Assembly
 HDAM Hierarchical Direct Access Method
 HDB Historical Data Base (ODS)
 HDB3 Higher Density Bipolar Three Zeros Substitution
 HDBK Handbook
 HDC Hard Disc drive Controller
 HDD Hard Disc Drive
 HDD Head Down Display
 HDF Hf Direction Finding station
 HDG Heading (N-FDPS)
 HDG HeaDinG
 HDG Heading (True Heading)
 HDL High Level Document
 HDLA Handling Agent
 HDLC High-Level Data Link Control (Protocol) (RADNET)
 HDLC High Level Data Link Communication
 HDLC/LAP-B High-Level Data Link Control / Link Access Protocol - Type B
 HDOP Horizontal Dilution of Precision
 HDS Help Desk Staff
 HDSL High bit rate Digital Subscriber Line
 HDTV High Definition TeleVision
 HDX Half DupleX
 HEAD Flight by Head of State (Flight plan status indicator)
 HEC Hamburg Executive Controller
 HEC Header Error Control
 HED Heading
 HEH Hannover East High
 HEI Human Error Identification
 HEIDI Harmonisation of European Incident Definitions Initiative for ATM (SQS)
 HEL High Energy Laser
 HEL HELicopter
 HELLANET Hellenic aeronautical Network
 Page 206
 EUROCONTROL AIRIAL
 Acronym Full form
 HEMS Helicopter Emergency Medical Service
 HEO Highly Elliptical Orbit
 HEP Horizontal Expansion Programme
 HEP Human Error Probability
 HERA Human Error in ATM analysis tool
 HERAS Hellenic Radar System
 HERMES Harmonised En-Route Metering and Spacing system (Système harmonisé de régulation et de mise en
 séquence en route des arrivées)
 HERMES HEuristic Runway Movement Event Simulation
 HERMES (Hermes) HERMES Air Transport Organisation
 HESSD Human Error, Safety and Systems Development
 HETA Harmonised European Transition Altitude
 HEX Hexadecimal
 HEX Horizontal Expansion (of 8.33 kHz deployment)
 HF Human Factors (facteurs humains)
 HF Holding to a Fix (ARINC 424 Path Terminator)
 HF High Frequency (3-30MHz)
 HF Case Human Factors Case
 HFDL High Frequency Data Link
 HFDR HF Data Radio
 HFDU HF Data Unit
 HFFG Human Factors Focus Group
 HFGS HF Ground Station
 HFI Human Factors Integration
 HFIAI Human Factors in Incident and Accident Investigation (HRT)
 HFNPDU High Frequency Subnetwork Protocol Data Unit
 HFOM Horizontal Figure of Merit
 HFS Human Factors Studies
 HFSG Human Factors Study Group (ICAO)
 HFSG Human Factors Sub-Group (EATCHIP/EATM/HUM/HRT)
 HFSMS TF Human Factors in Safety Management Systems Task Force
 HFSNDP HF Subnetwork Data Protocol
 HFTE Human Factors Testing and Evaluating
 HFX Holding Fix
 Page 207
 EUROCONTROL AIRIAL
 Acronym Full form
 Hg Mercury
 HGT HeiGhT, height above
 HHC Hannover High Coordinator controller
 HHE Hannover High Executive controller
 HHH Hannover Hamburg High
 HHL Hannover Hamburg Low
 HHmm Hours and minutes
 HHMMSS hour-hour / minute-minute / second-second
 HI FI SIM High-Fidelity Simulator
 HICP Harmonised Index of Consumer Prices
 HIDE Harmonised, Integrated Development Environment
 HIEO Highly Inclined Elliptical Orbit Satellite
 HIFA Human Factors Integration in Future ATM Systems
 HIL Human in the Loop
 HIL Horizontal Integrity Limit
 HILAS Human Integration in the Lifecycle of Aviation Systems
 HIMS Hide Implementation Management Support (group)
 HIO Hamburg Input Operator
 HIP Hearing of Interested Parties / Audition des parties intéressées
 HIPER-LAN High Performance Local Area Network
 HIPS Highly Interactive Problem Solver = Système hautement interactif de planification et de résolution
 HIRIS Human Resources Information System (Système d'information des ressources humaines)
 HIRL High Intensity Runway Lights
 HIRO High Intensity Runway Operations (Exploitation haute intensité des pistes)
 HIRTA High Intensity Radio Transmission Area
 HISAC Environmentally-friendly High Speed Aircraft
 HIST History
 HIT Hardware Integration Test (MAS/DFS - ODS)
 HIT Hughes Improved Terminal
 HITL High Intensity Taxiway Lights
 HITL Human-In-The-Loop
 HIWAS Hazardous Inflight Weather Advisory Service
 HJ sunrise to sunset
 HLA High Level Airspace
 Page 208
 EUROCONTROL AIRIAL
 Acronym Full form
 HLAPB High-Level Airspace Policy Body
 HLD High-Level Document
 HLD Hold List
 HLD Hold
 HLDC High-Level Data Link Control
 HLDG HoLDinG
 HLEN Header Length
 HLG High-Level Group
 HLLC High-Level Link Layer Control
 HLM High-Level Management
 HLM High Low Mixed
 HLR Home Location Register
 HLRIE Host Lateral Intent Error
 HLS Hue, Lightness, Saturation
 HLT Heavy Load Threshold
 HM Holding to a Manual Termination (ARINC 424 Path Terminator)
 HM Hold Message
 HM Holding Pattern to a Manual Termination
 HMA High Memory Area
 HMAI Harmonisation of Military Aeronautical Information
 HMATTF Handling of Military Air Traffic Task Force
 HMD Horizontal Miss Distance (filter) (TCAS/ACAS)
 HME Height Monitoring Element
 HME Height Measuring Element
 HMH Hannover Münster High
 HMI Human-Machine Interface (interface homme/machine)
 HMI Human-Machine Interaction
 HMI Hazardously Misleading Information
 HML Hannover Münster Low
 HMR Helicopter Main Routes
 HMS Head of Medical Service
 HMSO Her Majesty's Stationery Office
 HMT Hand Microphone Telephones
 HMU Height Monitoring Unit (RVSM)
 Page 209
 EUROCONTROL AIRIAL
 Acronym Full form
 HMZ Slovenian National Hydrometeorological Institute
 HN sunset to sunrise
 HN50 Incident ayant pour conséquence une réduction de séparation inférieure à 50% du minimum de séparation
 radar
 HN70 Incident ayant pour conséquence une réduction de séparation inférieure à 70% du minimum de séparation
 radar.
 HND Hand over keyboard button
 HNS Host Nation Support
 HNSE Horizontal Navigation System Error
 HO Hours Office, Availability during office hours
 HOA Hand-Off Accept
 HOA Hand-Off Acceptance
 HOGI Harmonisation of Operational Air Traffic and its General Air Traffic Interface
 HOL HOLiday
 HOL High-Order Language
 HOLD HOLD an incoming call while making another
 HOLD HOLD, (flight plan navigation)
 HOLD Hold(ing)
 HOOD Hierarchical Object Oriented Design
 HOP Hand-Off Propose
 HOP Hand-Over Proposal
 HOP Harmonisation of Operational Procedures (AT, CH, DE)
 Hor Horizontal
 HOSP Medical (hospital) flight (Flight plan status indicator)
 HOT holdover time
 HP Horizontal Polarisation
 HP Hewlett Packard
 HP Human Performance
 HP High Precision
 HP Horse-Power
 HP-UX Hewlett Packard Unix
 HPA High Power Amplifier
 hPa hectopascal
 HPC Hughes Programming Centre (NPC)
 HPD Horizontal Polar Diagram
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 Acronym Full form
 HPE Horizontal Position Error
 HPE High Precision Equipment
 HPFG Human Performance Focus Group
 HPL Horizontal Position Limit
 HPL Horizontal Protection Level
 HPMS Human Performance Management System
 HPO High Performance Option
 HPOL Horizontal Polarisation
 HPP Hardware Plot Processor
 HPR High Performance Routing
 HPRS Hide Problem Reporting System
 HPRT Hmi Preview Response Time
 HPSF Human Performance Steering Function
 HPSF Human Performance Steering Function
 HPZ Helicopter Protection Zone
 HQ Headquarters (siège de l'Agence) (EUROCONTROL Agency)
 HR Croatia, Republic of Croatia (ISO Country Code)
 HR Human Resources
 HR HouRs
 HRA Human Reliability Assessment / Analysis
 HRD Human Resources Directorate
 HRFG Human Resources Framework Group
 HRFGS Human Resource, Finance & General Services bureau
 HRH Hannover Ruhr High
 HRI Human resources International (Israël)
 HRIS Human Resources Information System
 HRL Hannover Ruhr Low
 HRM Human Resources Management / Services de gestion des resources humaines
 HRMT Human Resources Management Team
 HRP Human Resources Planning and Corporate Services = Planification et aspects généraux des ressources
 humaines
 HRPTSG Human Resource Planning and Training Study Group (ICAO)
 hrs hours
 HRS Human Resources and Services Division (division "Ressources humaines et services de l'Agence")
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 Acronym Full form
 HRS/AIFM Human Resources and Services/Agency Infrastructure & Facilities Management (division "Ressources
 humaines et services de l'Agence"/gestion de l'infrastructure et des installations de l'Agence)
 HRS/BPS Human Resources and Services/HRS Budget, Projects & System Support (division "Ressources humaines et
 services de l'Agence"/service "Budget, projets et appui aux systèmes de la division HRS")
 HRS/COMP Human Resources and Services/Compensation & Benefits (division "Ressources humaines et services de
 l'Agence"/rémunérations, pensions, allocations et indemnités)
 HRS/CSS Human Resources and Services/Corporate Security (division "Ressources humaines et services de
 l'Agence"/sécurité de l'Agence)
 HRS/HRBP Human Resources and Services/Human Resources Business Partnering (division "Ressources humaines et
 services de l'Agence"/partenariat d'affaires "Ressources humaines")
 HRS/HWB Human Resources and Services/Health & Wellbeing (division "Ressources humaines et services de
 l'Agence"/santé et bien-être)
 HRS/OFF Human Resources and Services Office (bureau "Ressources humaines et services de l'Agence" - bureau
 HRS))
 HRS/RSD Human Resources and Services/Rules & Regulations & Social Dialogue (division "Ressources humaines et
 services de l'Agence"/service "Dispositions statutaires et réglementaires et dialogue social")
 HRS/SPP Human Resources and Services/Prevention & Protection at Work (division "Ressources humaines et services
 de l'Agence"/prévention et protection au travail)
 HRS/WPSD Human Resources and Services/Workforce Planning & Staff Development (division "Ressources humaines et
 services de l'Agence"/planification des effectifs et développement des compétences du personnel)
 HRSC Human Resources Steering Committee (Training Programme Ab Initio, CC) / Comité directeur des ressources
 humaines
 HRT Human Resources Team
 HRV Heart-Rate Variability
 HS Headset
 HS service available during hours of scheduled operations
 HS-DTS High Speed Data Transmission System
 HSA Hollandse Signaal Apparaten (NL)
 HSCSD High Speed Circuit Switched Data
 HSCT High-speed Civil Transport
 HSD Hardware System Design
 HSE Health and Safety Executive
 HSH Hannover Solling High
 HSI Horizontal Situation Indicator
 HSI Horizontal Situation Indicator
 HSL Hannover Solling Low
 HSM High Speed Modem
 HSM Hierarchical Storage Management
 HSN non-StaNdard headset module
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 Acronym Full form
 HSNR Highest value of SNR
 HSP Human Factors Sub-Programme (EATM/HUM/HRS)
 HSP High Speed Printer
 HSRP Hot Standby Routing Protocol
 HSS Standard HeadSet module
 HSSI High Speed Serial Interface
 HST Hypersonic Transport
 HST High-Speed Train (train à grande vitesse)
 HSUP Hannover sectors SUPervisor
 HSV Hue, Saturation, Value
 HT High Tension
 HT HorizonTal
 HTA Hermes Training Aircraft
 HTA Harmonised Transition Altitude
 HTA Hierarchical Task Analysis
 HTAWS Helicopter Terrain Avoidance and Warning System
 HTD History Trial Dots (ODS)
 HTI Human Technology Integration
 HTML Hypertext Markup Language
 HTMS Highway Transportation Management System
 HTP Hardware Test Plan
 HTTP Hypertext Transport Protocol
 HTTPS Secure HTTP
 HTZ Helicopter Traffic Zone
 HU Hungary, Republic of Hungary (ISO Country Code)
 HUD Head-Up Display
 HUM Humanitarian flight (Flight plan status indicator)
 HUM Human factors management (Gestion des facteurs humains)
 HUM BD Human Factors Management Business Division (EUROCONTROL - DAS Business Directorate)
 HUM RES Human Resources
 HUM-ACA ATSEP competence assessor
 HUM-CCA Controller competence assessor
 HUM-CLASS HUM-CLASS content
 HUM.ET1.ST05.4000-GU Air Traffic Controller Training at Operational Units Edition 2, 29 June 99
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 EUROCONTROL AIRIAL
 Acronym Full form
 HUM.ET1.ST13.3000-RE Critical Incident Stress Management
 HUM02-ASP08 HUM02-ASP08 Use commonly based Team Resource Management concepts, methods and tools
 HUMR Human Resources
 HUMS Health and Usage Monitoring System
 HUP Head Up Panel
 HVAC Heating, Ventilation and Air Conditioning
 HVDF Hf & Vhf Direction Finding stations co-located
 HVPSU High Voltage Power Supply Unit
 HVY HeaVY
 HW Hardware
 HWAL HardWare Assurance Level
 HWCI Hardware Configuration Item (MAS/DFS - ODS)
 HWCI HardWare Configuration Item (ARTAS)
 HWCO Holding Window Communication Object
 HWG Harmonisation Working Group
 HWH Hannover West High
 HWMTP HW Maintenance Training Plan
 HWP Holding Waypoint
 HWU Hardware Unit
 HX no specific working hours
 HYB Hybrid Position (Used in MUAC Simulator)
 HYR HigheR
 Hz Hertz (cycle per second)
 HZ dust HaZe
 I Italy
 I and Q Channels In-phase and Quadrature channels
 I(Fd) MTI Improvement Factor
 I-AM-SAFE I-AM-SAFE Feasibility Study
 I-DCTS Interim Digital Communication Terminal System
 I-GWG International GBAS Working Group
 I-TCP Indirect TCP
 I/A Incident Analysis
 I/A If Applicable (CPDLC)
 I/F Interface
 Page 214
 EUROCONTROL AIRIAL
 Acronym Full form
 I/NAV GALILEO's Integrity Navigation Message Type
 I/O Interoperability
 I/O Input / Output
 I/R Interrogator/Responsor
 I001 Item in Data Category 001
 I1 Incident Type 1
 I2 Incident Type 2
 I2RO Incident Type 2 Reporting Office
 I4D Initial 4D
 IA Instantaneous Access
 IA Interoperability Assessment
 IA Indirect Access
 IA Impact Assessment
 IA Interconnection Agreement
 IA intelligence artificielle (Artificial Intelligence - AI)
 IA International Alphabet
 IA-5 International Alphabet Number 5
 IA/CC Indirect Access/Common Control
 IA5 International Alphabet No. 5
 IA; IAU Internal Audit Unit (Unité d'audit interne)
 IAA Israel Airports Authority
 IAA Irish Aviation Authority (Údarás Eitlíochta na hÉireann)
 IAAE International Association of Airport Executives
 IAASM International Academy of Aviation and Space Medicine (Académie internationale de médecine aéronautique
 et spatiale - AIMAS)
 IAB Internet Activities Board
 IAC Instrument Approach Chart
 IAC Irish Air Corps
 IACA International Air Carriers Association
 IACH Individual ATC Flight Plan Changes
 IACS Integrated Avionics Card System
 IACS INTERGRAPH Aeronautical Charting System
 IACSP International Aeronautical Communications Service Providers
 IADB Inter-American Development Bank
 Page 215
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 Acronym Full form
 IAEA International Atomic Energy Agency
 IAF Israeli Air Force
 IAF Initial Approach Fix
 IAF Initial Arrival Fix
 IAFP Individual ATC Flight Plan Proposal
 IAG International Airlines Group
 IAG Interim Airport Group
 IAG International Association of Geodesy
 IAGC Instantaneous AGC
 IAHA International Aviation Handlers' Association
 IAIP Integrated Aeronautical Information Package (EATCHIP)
 IAL Instrument Approach and Landing (Chart)
 IAL International Air-radio Limited (UK)
 IALA International Association of Lighthouse Authorities
 IAM Institute of Aviation Medicine
 IAMF International Aviation Monetary Fund
 IANA Internet Assigned Numbers Authority
 IANS Institute of Air Navigation Services (Institut de la navigation aérienne - INA) - Lux
 IANSSC IANS Steering Committee
 IAO In And Out of clouds
 IAO Internal Audit Office
 IAOPA International Council of Aircraft Owner and Pilot Associations
 IAP Instrument Approach Procedure
 IAPA Implications on ACAS performances due to ASAS implementation
 IAPL IFPS APL Message
 IAPS Integrated Avionics Processing System
 IAR Intersection of Air Routes
 IAR Instrument Autonomous Rules
 IAR Institutional Arrangements and Requirements Task Force
 IARR IFPS ARR Message
 IARR Individual Arrival
 IARTF Institutional Arrangements and Requirements Task Force
 IAS International Accounting Standards
 IAS Indicated Air Speed (ICAO 8400/4)
 Page 216
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 Acronym Full form
 IAS-TFA Implementation of Airspace Strategy - Task Force "A" of ASMSG (EUROCONTROLIAS-
 TFB Implementation of Airspace Strategy - Task Force "B" of ASMSG (EUROCONTROLIASA
 International Aviation Safety Assessment
 IASCC International Air Safety and Climate Change Conference
 IASS International Air Safety Seminar (FSF)
 IAT International Atomic Time
 IAT Information Analysis Table
 IATA International Air Transport Association (Association du transport aérien international)
 IATC International Air Traffic Control
 IATS ICAO Air Transport Symposium
 IATTF IFPS Acceptance Test Task Force
 IAVW International Airways Volcano Watch (ICAO Operational Subgroup)
 IAW In accordance with
 IAWP Initial Approach Waypoint
 IB Information Button, (mouse / trackball)
 IB Information (display) Button
 IBAA International Business Aviation Association
 IBAC International Business Aviation Council
 IBAFO Invitation to Submit a Best and Final Binding Offer
 IBAP Industry-Based Prototype
 IBC Integrated Broadband Communications
 IBF Institut für Begleitforschnung und psychologisches Qualitätsmanagement (DE)
 IBI Intergovernmental Bureau for Informatics
 IBILS Integrity Beacon Landing System
 IBLS Integrity Beacon Landing System
 IBM International Business Machines (US)
 IBN Identification BeacoN
 IBP Industry-Based Platform
 IBRD International Bank for Reconstruction and Development (= BIRD)
 IC Interrogator Code
 IC Intercom
 IC Integrated Circuit
 IC/DS In Climb/Descent Spacing
 ICA Independent component analysis
 Page 217
 EUROCONTROL AIRIAL
 Acronym Full form
 ICAA International Civil Airport Association
 ICAEA International Civil Aviation English Association (Association internationale pour l'anglais de l'aviation civile)
 ICAO International Civil Aviation Organization (Organisation de l'aviation civile internationale - OACI)
 ICAO EUR European Region of the International Civil Aviation Organization
 ICAO-CAEP ICAO Committee on Aviation Environmental Protection
 ICAO/NAT/SPG ICAO North ATlantic System's Planning Group
 ICARD ICAO EUR/NAT Regional Database
 ICARD ICAO Five-Letter Name-Code And Route Designator System (Système de codes et d'indicatifs de routes de
 l'OACI)
 ICAS International Council of the Aeronautical Sciences
 ICAT II-Code Allocation Tool
 iCAT interactive Computer Assisted Training
 ICATEE International Committee for Aviation Training in Extended Envelopes
 ICB International Competitive Bidding
 ICB Industry Consultation Body
 ICBM Intercontinental Ballistice Missile
 ICBWG Implementation and Capacity Building Working Group
 ICC Inter-Centre Coordination
 ICC Inter-Centre Communications
 ICC Inbound Control Channel
 ICCAIA International Coordinating Council of Aircraft Industry Associations
 ICCB Internet Control and Configuration Board
 ICCB Information Change Control Board
 ICCS Integrated Communication Control System
 ICCT Internal Communications Core Team
 ICCU Intercomputer Communications Unit
 ICD Interface Control Document (OLDI)
 ICD International Code Designator
 ICD Increase Descent
 ICE ICE, ICing
 ICET IATA Capacity Enhancement Team
 ICHG Individual Change
 ICHG IFPS CHG Message
 ICI Interface Control Information
 Page 218
 EUROCONTROL AIRIAL
 Acronym Full form
 ICIP Inital CIP (APT)
 ICL Increase Climb
 ICL International Computers Limited
 ICM Interline Communications Manual
 ICM InterCoM
 ICMP Internet Control Message Protocol
 ICNA Ingénieur du contrôle de la navigation aérienne / Air Traffic Control Engineer
 ICNI Integrated Communications, Navigation and Identification
 ICNL IFPS Cancellation Message
 ICNL Individual Cancel
 ICNL IFPS CNL Message
 ICNS Integrated Communication, Navigation and Surveillance
 ICO Improved Configuration Optimiser (NEVAC)
 ICO Intermediate Circular Orbit
 ICOG Interoperability Consulting Group
 ICON Involved Controllers
 ICONET ICO Network
 ICP Interactive Control Panel
 ICP Internal Clarification Project
 ICR Integrated Cancellation Ratio
 ICR Interactive Conflict Resolution
 ICR Integrated Collaborative Rerouting (US)
 ICRAT International Conference on Research in Air Transportation
 ICS Implementation Conformity Statement
 ICS Information and Communication Services
 ICT Information and Communications Technologies
 ICT Information and Communication Technology
 ICTS Ice Contaminated Tailplane Stall
 ICTZ Intertropical Convergence Zone
 ICV Inter Clutter Visibility
 ICVM ICAO Coordinated Validation Mission
 ICWG Interface Control Working Group
 iCWP integrated Controller Working Position
 ICWS Integrated Control Work Station
 Page 219
 EUROCONTROL AIRIAL
 Acronym Full form
 ID Identity
 ID Identification (ICAO)
 ID Identity (N-FDPS)
 ID Identifier
 ID Information Display
 IDA IDentification Area (KDS)
 IDA Indirect Access (VCS)
 IDA Interchange of Data between Administrations
 IDA Initial Distribution Area (IFPS)
 IDB Integrated Database (DBE + DBC)
 IDC Indirect Digital Control
 IDD Integrated Data Dictionary
 IDE Interface Device Enhancement
 IDE Integrated Drive Electronics
 IDENT IDENTification
 IDENT Squawk Ident (SSR function)
 IDEP Individual Departure
 IDG Integrated Database
 IDHS Intelligence Data Handling System
 IDI Initial Domain Identifier
 IDL Interface Definition Language
 IDLA Individual Delay (message)
 IDLM Internal Directory Level Meeting
 IDMS Integrated Database Management System (no lomger used)
 IDN International Data Number
 IDP Initial Domain Part
 IDRF Interessengemeinschaft der regionalen Flugplätze e.V. (Community of Interests of the Regional Aerodromes
 Incorporated Association)
 IDRP Inter-Domain Routing Protocol
 IDS Information Display System
 IDSG Interim Deployment Steering Group
 IDU Interface Data Unit
 IDU Interactive Database Utility
 IE Included / Exempted
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 Acronym Full form
 IE Ireland (ISO Country Code)
 IE Information Element
 IEC Interexchange Carrier
 IEC International Electrotechnical Commission/Committee
 IEE Institution of Electrical Engineers
 IEEE Institute of Electrical and Electronic Engineers (US)
 IEFPM Individual EFPM
 IEHF Institute of Ergonomics and Human Factors
 IEM Interpretative / Explanatory Material (Joint Aviation Requirements)
 IEP Information Exchange Programme
 IES Interface Editing Station
 IES Interface Editor System
 IESG Internet Engineering Study Group
 IESSA Ingénieur électronicien des systèmes de la sécurité aérienne
 IESV Instant Environment SerVer
 IETF Internet Engineering Task Force
 IETF Internal EATMS Task Force
 IF Intermediate Fix
 IF Intermediate Frequency
 IF Initial Fix (ARINC 424 Path Terminator)
 IFA In-Flight Alignment
 IFA International Federation of Airworthiness
 IFA Image Frequency Attenuation
 IFAIMA International Federation of Aeronautical Information Management Associations
 IFALDA International Federation of Airline Dispatchers' Associations
 IFALPA International Federation of Air Line Pilots' Associations
 IFATCA International Federation of Air Traffic Controllers' Associations (Fédération internationale des associations de
 contrôleurs du trafic aérien)
 IFATSEA International Federation of Air Traffic Safety Electronic Associations
 IfB Institut für Begleitforschung (DE) / Institute for Evaluation Research
 IFD Initial Functional Description / EASIE
 IFDS Interactive Flight Data System
 IFF Identification (or Interrogation) Friend / Foe
 IFFITAF IFPS-DBE Functional Interface System Task-Force
 Page 221
 EUROCONTROL AIRIAL
 Acronym Full form
 IFFN Identification Friend, Foe or Neutral
 IFG-NME WG Implementation Facilitation Group of the National Management Experts Working Group
 IFI International Financial Institution
 IFIP International Federation for Information Processing
 IFL Intermediate Flight Level
 IFLIPS Integrated Flight Prediction System
 iFMP integrated Flow Management Position
 IFOP Initial Flight Object Prototype
 IFOR Implementation Forces (UN, NATO)
 IFP Keyword from IFPS used in Field18 to provide a warning
 IFPA IFPS Area (Sous-région IFPS)
 IFPAU IFPS Applicable Unit
 IFPD Individual Flight Plan Data
 IFPDSQ Individual FPD Summary Query
 IFPDSQR Individual FPD Summary Query Reply
 IFPL IFPS Internal Flight Plan
 IFPL Individual Flight Plan message
 IFPLID Individual Flight Plan Identity code
 IFPM Individual FPM
 IFPN IFPS Network (Réseau IFPS)
 IFPO IFPS Operator
 IFPP Instrument Flight Procedures Panel
 IFPP Initial Flight Plan Processing (Traitement initial des plans de vol)
 IFPPS Integrated Flight Plan Processing System
 IFPR IFPS Region
 IFPRU IFPS Responsible Unit
 IFPS Integrated Initial Flight Plan Processing System (Système intégré de traitement initial des plans de vol)
 IFPU Integrated Initial Flight Plan Processing Unit (Unité IFPS) (old name, see NMD)
 IFPU-1 IFPS Unit - Haren Brussels (Belgium)
 IFPU-2 Integrated initial Flight Plan Processing Unit (Unit 2, Brétigny-Sur-Orge (France) )
 IFPUV IFPS Validation System
 IFPZ IFPS Zone
 IFPZA IFPS Zone A
 IFR Induced Field Ratio
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 EUROCONTROL AIRIAL
 Acronym Full form
 IFR Instrument Flight Rules (règles de vol aux instruments)
 IFR/GAT Instrument Flight Rules/ General Air Traffic
 IFRB International Frequency Registration Board
 IFRS International Financial Reporting Standards
 IFS Indemnité forfaitaire spéciale (Special fixed allowance)
 IFS Implementation Feasibility Study
 IFSA Institu Français de Sécurité Aérienne
 IfSAR Interferometric Synthetic Aperture Radar
 IFSET ICAO Fuel Savings Estimation Tool
 IFTO International Federation of Tour Operators
 IGA International General Aviation
 IGAC Inspection générale de l'aviation civile
 IGCN Independent Ground Communications Network
 IGEB Interagency GPS Executive Board
 IGN Institut géographique national
 IGP Ionospheric Grid Point
 IGP Interior Gateway Protocol
 IGS Increased Glide Slope
 IGS International GPS Reference Network
 IGSO Inclined geosynchronous orbit
 IHL Internet Header Length
 IHM Interface homme-machine
 IHS Inner Horizontal Surface
 IHST International Helicopter Safety Team
 II Interrogator Identity
 II Interrogator Identifier
 II-Code Interrogator Identifier Code
 II/III Category II / III (airport)
 IIFG Institutional Issues Focus Group
 IIMSES Initial Implementation of Mode S Enhanced Surveillance (a joint project of UK, France, Germany, Benelux,
 including POEMS)
 IIOP Internet Inter-ORB Protocol
 IIRS Internal Interface Requirement Specification
 IIS Internal Information System
 Page 223
 EUROCONTROL AIRIAL
 Acronym Full form
 IISLS Improved Interrogator Sidelobe Suppression
 IKBS Intelligent Knowledge Based System
 IKD States In Kind Delivery States (France, Germany, Italy, Spain, UK, represented by their ATS providers DNA,
 DFS, ENAV, AENA, NATS)
 IL Israel (ISO Countries codes)
 ILC IATA Learning Centre
 ILO International Labour Organisation / Organisation Internationale du Travail (=OIT)
 ILOAT Administrative Tribunal of the International Labour Organisation (Tribunal administratif de l'Organisation
 internationale du Travail (TAOIT))
 ILS Integrated Logistic Support
 ILS Instrument Landing System
 ILSP Integrated Logistic Support Program
 ILT Inspectie Leefomgeving en Transport (Netherlands Human Environment and Transport Inspectorate)
 IM Instant Messaging
 IM Inner Marker
 IM Information Management
 IM S&M Interval Management Spacing & Merging
 IMA Integrated Modular Avionics
 IMAGE Instrument Macroscopique d'aide à la Gestion de l'espace (FR) (CORTA)
 IMAGINE Improved Methods for the Assessment of the Generic Impact of Noise in the Environment
 IMAL Integrity Monitoring Alarm Limit
 IMAP Internet Message Access Protocol
 IMASSA Institut de Médecine Aérospatiale du Service des Armées (FR)
 IMAWP Initial Missed Approach Waypoint
 IMB Inter-institutional Medical Board (collège médical interinstitutionnel - CMI)
 IMC Instrument Meteorological Conditions
 IMF International Monetary Fund
 IMG IMmmiGration
 IMM Interacting Multiple Models, a generally applicable algorithm of track state estimation
 IMO International Maritime Organisation / Organisation maritime Internationale (= OMI)
 IMOTHEP Investigation and Maturation of Technologies for Hybrid Electric Propulsion
 IMP Inter Message Processor
 IMP Implementation Services
 IMP Implementation Master Plan (Plan-cadre de réalisation)
 IMPACT Integrated Aircraft Noise and Emissions Modelling Platform
 Page 224
 EUROCONTROL AIRIAL
 Acronym Full form
 IMPACT Information Market Policy Actions
 IMPACT Integrated Model of Perceived Awareness Control
 IMPACT Innovative Methodology for the Projection of ATM Concepts onto the Training of ATCOs
 IMPACT Methods and tools to assess impact of future ATM systems on controllers' jobs (Méthodes et outils
 d'évaluation de l'impact des futurs systèmes ATM sur le travail des contrôleurs)
 Impl Implementation
 IMPLAN Implementation Plan (Cross Reference for internal traceability)
 IMPR IMPRrove(ing)
 IMS Integrated Management System (système de gestion intégrée)
 IMS Integrity Monitor Station
 IMT Information Modelling Team
 IMT IMmediaTe(ly)
 IMTEG ILS/MLS Transition EUR Group (EATCHIP)
 IMU Inertial Measurement Unit
 IMUX Input MUltipleXer
 IN Information Notice
 IN Included
 IN(S) INch(eS)
 INA INitial Approach
 INA Institut de la navigation aérienne (Institute of Air Navigation Services - IANS) (Lux)
 INAC INSTITUTO NACIONAL DE AVIACAO CIVIL (Portugal)
 INAP Integrated Network Management and extended ATC Planning
 INBD INBounD
 INC IN Cloud
 INCA Incident circulation aérienne (base de données des événements liés à la sécurité de l'ATM)
 InCAS Interactive Collision Avoidance Simulator
 INCERFA Uncertainty Phase
 INCOSE International Council of Systems Engineering
 INCS Independent Non-Cooperative Surveillance
 Ind Industry
 IND SIMUL Individual Simulation
 INDRA Indra Systemas (Company, Spain)
 INEA Innovation and Networks Executive Agency
 INEXSES (ICAO Forum on) Integration and Harmonization of NextGen and SESAR
 Page 225
 EUROCONTROL AIRIAL
 Acronym Full form
 INF01 Information
 INFO INFOrmation
 INFOSEC Information Security
 INFR-C Infrastructure Creation
 INI Initial Approach Controller
 iNM integrated NM system
 iNM Network Management Investment
 INM Integrated Noise Model (software developed by the US FAA, manufacturer Aerospatiale Matra Airbus)
 INMARSAT International Maritime Satellite
 INO Innovative Research (Recherche innovante)
 INO International NOTAM Operation (Gestion des NOTAM internationaux)
 INO Innovative Research (EEC)
 INOP INOPerative
 INP INPut
 INPR IN PRogress
 INR Input Reconstruction
 INREP Voluntary and Confidential Reporting of Safety Issues
 INREP INcident REPorting
 INREP Voluntary reporting of safety issues in Maastricht UAC (Notification volontaire d'événements liés à la sécurité
 au Centre de Maastricht)
 INRIA Institut national de Recherche en Informatique et Automatique (FR) / National Institute for Computer Science
 and Automation Research.
 INS Inertial Navigation System
 INSPIRE Infrastructure for Spatial Information in the European Community
 INST Installation
 INSTAR Institutional Arrangements for European Air Traffic Management
 INSTILUX EUROCONTROL Institute of Air Navigation Services (LU), now called Training Institute and replaced by IANS
 INSTL INSTall(ation), INSTalled
 INSTR INSTRument
 INT INTersection
 Int International
 INT INTegration and swci resting phase
 INTEG Integration of EGNOS into Galileo
 INTEGRA Advanced ATM Tool Integration Project (CARE action)
 INTELSAT INternational TELecommunications SATellite (Organisation)
 Page 226
 EUROCONTROL AIRIAL
 Acronym Full form
 INTENT Transition towards Global Air and Ground Collaboration in Traffic Separation Assurance
 INTER INTERmittent
 INTER The ATN Internet Strategy
 INTERCAUTRA Internal CAUTRA protocol
 INTEROP interoperability
 INTL International
 INTNET INTegration NETwork, (for interchange of flight plan data)
 INTRG INTRerroGator
 INTRP INTeRruPt(ion)
 Intruder Aircraft against which TCAS issues an advisory
 INTSF INTenSiFy(ing)
 INTST INTenSiTy (of runway lighting)
 INU Interial Navigation Unit
 INV Inverse / Inverted
 INV INVerted
 INV Innovative Studies and Technological Assessment (ARDEP)
 INV invalidity (invalidité) (CHRONOTIME)
 INV Inventory Analysis
 INWP Intermediate Waypoint
 IO Input Operator
 IO Interoperability - Input / Output
 IO Input Outout
 iOAT FPL improved Operational Air Traffic Flight Plans
 IOATF IFPS Operational Advisory Task Force
 IOBD Initial estimated Off-Block Date
 IOBT Initial estimated Off-Block Time
 IOC Input/Output Calls
 IOC Initial Operational (or Operating) Capability
 IOC(M) Initial Operational Capability (Milestone)
 IOCD Initial Operational Concept Document
 IOCP Internal Operational Clarification Project
 IOCP Input / Output Configuration Programme
 IOD Input / Output Device
 IOD Issue of Data
 Page 227
 EUROCONTROL AIRIAL
 Acronym Full form
 IODC Issue Of Data Clock
 IODE IOD Ephemeris
 IODF IOD Fast Corrections
 IODI IOD Ionospheric Grid Point Mask
 IODP IOD PRN Mask
 IOLP Interest on Late Payment
 ION Institute of Navigation
 IOP Interoperability Programme
 IOP Input / Output Processor (RMCDE)
 IOP Interoperability Protocol
 IOPA International Council of Aircraft owners and Pilot Association
 IOR Indian Ocean Region (ICAO)
 IOR Indian Ocean Region
 IOR INMARSAT Indian Ocean Region
 IOR Interoperable Object Reference
 IOSS Input Output Sub System
 IOT In-Orbit Testing
 IP Internet Protocol
 IP Implementation Package (SESAR)
 IP Information Button (mouse)
 IP Information Paper
 IP Information Processing Level
 IP-Message Inter-Personal Message
 IP-PBX IP based Private Branch Exchange
 IP-Reply Inter Personal Message Reply
 IP-VCS IP based Voice Communication System
 IP1 Implementation Package 1 (SESAR)
 IP2 Implementation Package 2 (SESAR)
 IP3 Implementation Package 3 (SESAR)
 IPA International Phonetic Alphabet
 IPAG Intellectual Property Advisory Group (Policy Guidelines for Intellectual Property Rights)
 IPAS Integrated Preparation and Analysis System
 IPAX Internet Protocol for Aeronautical Exchange
 IPAX-TF Internet Protocol for Aeronautical Exchange Task Force
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 Acronym Full form
 IPB Inner Performance Boundary (Tunnel Concept)
 IPC Intermittent Positive Control
 IPC Inter-Process Communication
 IPCC Intergovernmental Panel on Climate Change
 IPG Integration Project Group
 IPI Initial Protocol Identifier
 IPL Initial Programme Load(ing)
 IPL Intermediate Flight Plan
 IPL Individual Flight Plan
 IPLM Internal Programme manager Level Meeting
 IPM Inter Personal Message
 IPM-Service Inter-Personal Message Service
 IPMM IPM Message (=IPM and its P1 envelope)
 IPMS Inter Personal Message Service
 IPN Inter Personal Notification
 IPng Internet Protocol - Next Generation
 IPOA Classical IP Over ATM
 IPP Ionospheric Pierce Point
 IPP Inter Pulse Period
 IPR Internal Process Review (ISO)
 IPR Intellectual Property Rights (droits de propriété intellectuelle - DPI)
 IPRT Internal Processing Response Time
 IPSE Integrated Programming Support Environment
 IPsec Internet Protocol Security
 IPSky Internet Protocol in the Sky
 IPSs Intellectual Proprietary Rights
 IPT Internal Processing Time
 IPv4 Internet Protocol version 4
 IPv6 Internet protocol version 6
 IPX Internet Paquet Exchange
 IQ Intelligence Quotient
 IQ Iraq (ISO countries codes)
 IQM Integrated Quality Management (for Radar Sensor)
 IR Interrogator Responder
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 Acronym Full form
 IR Implementing Rule (SES)
 IR Ice on Runway
 IR Infra-Red
 IR Information Retrieval
 IR Iran (ISO countries codes)
 IR Integrated Receiver
 IRAB Innovative Research Advisory Board (EUROCONTROL)
 IRAS Interactive Radar Analysis System
 IRB Independent Review Board
 IRB Incident Review Board
 IRD Interface Requirements Document
 IREF Internal REFerence
 IREN Incident Reporting European Network
 IRF Interrogation Repetition Frequency (radar standard)
 IRF Incident Report Form (DECADE)
 IRG Internal reference generator
 IRIG Inter-Range Instrumentation Group time codes
 IRIS Iris Recognition Immigration System (UK)
 IRL Ireland
 IRMA Indicateur radar de mouvements d'avions
 IRMA Intermediate Redesigned MCC Architecture (ESCO/DECADE)
 IROI Instantaneous Return on Investment
 IRP Integrated Risk Picture
 IRPD Internal Repetitive Flight Plan Data
 IRPL Internal Repetitive Flight Plan
 IRQ Interrupt ReQuest
 IRR Internal Rate of Return
 IRS Interface Requirement Specification
 IRS Inertial Reference System
 IRS Intermediate Route Sequence (FPPS/DECADE)
 IRs Implementing Rules (SES)
 IRSG Internet Research Study Group
 IRT Interrogation Repetition Time
 IRTF Internet Research Task Force
 Page 230
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 Acronym Full form
 IRU Inertial Reference Unit
 IRVR Instrument Runway Visual Range
 IS Iceland (ISO Country Codes)
 IS Intermediate System
 IS Interface Specification
 IS Infrastructure Support Section (of ENGD)
 IS International Standard
 IS In-Sequence sector (N-FDPS)
 IS-BAO International Standard for Business Aircraft Operations
 IS-ES Intermediate System - End System
 IS-IS Intermediate System to Intermediate System routing information exchange protocol
 IS-SME Intermediate System - Systems Management Entity
 ISA Initial Safety Assessment
 ISA Instantaneous Self-Assessment
 ISA International Standard Atmosphere
 ISA Independent Safety Auditor
 ISA International Standards Authority
 ISA Innovative Slot Allocation (Mécanisme innovant d'attribution des créneaux)
 ISABEL Interbank Standards Association of BELgium
 ISAGO IATA Safety Audit for Ground Operations
 ISAWARE Increasing Safety through collision Avoidance WARning integration
 ISBN International Standard Book Number
 ISBT Initial Shared Business Trajectory
 ISCM IFPS Software Configuration Manager
 ISDEFE Ingenieria de Sistemas para la Defensa de Espana (Spain)
 ISDN Integrated Services Digital Network (=RNIS)
 ISDN PRI Integrated Services Digital Network Primary
 ISH Intermediate System Hello
 ISIS Implementation of the Single European Sky in South East Europe
 ISIS Improved Switch Integrated System (=Bremen VCS)
 ISIS Integrated Standby Instrument
 ISL Intermediate Supplementary Flight Level
 ISL Inter-Station Link
 ISLS Interrogator Sidelobe Suppression
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 Acronym Full form
 ISM Information Security Manual
 ISMF Information Security Management Framework
 ISMG Institute Strategy and Management Group (EUROCONTROL, IANS)
 ISNM Integrated Systems & Network management
 ISO International Organization for Standardization / Organisation internationale de normalisation
 ISO 10737 Transport Layer Management (Standards For Open Systems Interconnection And Data Communication
 Published by ISO)
 ISO 7498-3 Basic Reference Model Part 3, Naming And Addressing (Standards For Open Systems Interconnection And
 Data Communication Published by ISO)
 ISO 8072 Transport Service Definition (Standards For Open Systems Interconnection And Data Communication
 Published by ISO)
 ISO 8073 Connection-Oriented Transport Protocol Specification (Standards For Open Systems Interconnection And
 Data Communication Published by ISO)
 ISO 8073 AD1 Connection-Oriented Transport Protocol Addendum 2, Class Four Operation Over Connectionless Network
 Service (Standards For Open Systems Interconnection And Data Communication Published by ISO)
 ISO 8208 International Standards Organization X.25 Packet Level Protocol for Data Terminal Equipment Document
 ISO 8326 Basic Connection-Oriented Session Protocol Specification (Standards For Open System Interconnection And
 Data Communication Published by ISO)
 ISO 8327 Basic Connection-Oriented Session Protocol Specification (Standards For Open Systems Interconnection And
 Data Communication Published by IS0)
 ISO 8348 Network Service Definition (Standards For Open Systems Interconnection And Data Communication
 Published by ISO)
 ISO 8348 AD1 Network Service Definition, Addendum 1, Connectionless Mode Transmission (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 8473 Protocol For Providing The Connectionless-Mode Network Service (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 8649 Service Definition For The Association Control Service Element (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 8650 Protocol Specification For The Association Control Service Element (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 8822 Connection-Oriented Service Definition (Standards For Open Systems Interconnection And Data
 Communication Published by ISO)
 ISO 8823 Connection-Oriented Presentation Protocol (Standards For Open Systems Interconnection And Data
 Communication Published by ISO)
 ISO 8878 International Organisation For Standard Use Of X25 To Provide OSI (Open Systems Interconnection)
 Connection Mode Network Services (Standards For Open Systems Interconnection And Data Communication
 Published by ISO)
 ISO 9000 International Standards For Quality Management, 1990
 ISO 9072-1 Remote Operations - Part 1, Model. Notation And Service Definition (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 9072-2 Remote Operations - Part 2, Protocol Specification Version (Standards For Open Systems Interconnection
 And Data Communication Published by ISO)
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 Acronym Full form
 ISO 9545 Protocol For Providing The Connectionless-Mode Network Service (Standards For Open Systems
 Interconnection And Data Communication Published by ISO)
 ISO 9595 Common Management Information Service Definition (Standards For Open Systems Interconnection And
 Data Communication Published by ISO)
 ISO 9596 Management Information Protocol - Part 1, Specification (Standards For Open Systems Interconnection And
 Data Communication Published by ISO)
 ISO/IEC International Standards Organization / International Electrotechnical Committee
 ISO/OSI Interconnexion de systèmes ouverts / Open System Interconnection ISPACG
 ISO/VT ISO standard Virtual Terminal
 ISOC Internet Society http://www.isoc.org/internet/
 ISOL ISOLated
 ISP International Standardised Profile (ISO)
 ISP Internet Service Provider
 ISPAC-G Informal South Pacific Group
 ISPF Interactive System Productivity Facility
 ISPL Individual Supplementary Flight Plan
 ISPS Information Security Policy Statement
 ISQMS Integrated Safety and Quality Management System (Safety Domain)
 ISR Independent Standby Radio
 ISRM Information Service Reference Model
 ISRM Information Services Reference Model
 ISRP Interconnexions sud de la région parisienne
 ISS Indirect sub-System
 ISS Intermediate SystemS
 ISS Implementation Support Services ; Implementation Support to States / Services de mise en oeuvre rendus
 aux Etats
 ISS Integrated Surveillance System
 ISS International Space Station
 ISSG Industry Safety Strategy Group
 ISSRE International Symposium on Software Reliability Engineering
 ISSS Initial Sector Suite System (FAA)
 IST Inter-colonial (or Atlantic) Standard Time, UTC -4h. (USA)
 IST Indirect Support Task
 ISTA Istanbul FMU
 ISU Initial Signal Unit
 ISUP Integrated Service User Part
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 Acronym Full form
 ISV Independent Software Vendors
 ISW Input Sequence Window
 iSWIM Initial System-Wide Information Management
 IT Italy, Italian Republic (ISO Country Code)
 IT Institutional Training
 IT Information Technology (technologies de l'information - TI)
 IT Integration Team
 ITA International Telegraphic Alphabet
 ITA Integrated Task Analysis (of ATCOs)
 ITA Institut du Transport Aérien / Institute of Air Transport
 ITA-2 International Telegraph Alphabet Number 2
 ITAEG Information Technology Advisory Expert Group (Standardisation, EPD - CEN/CENELEC/ETSI)
 ITAM Integrated Task Analysis Methodology
 ITAR-TASS Russian News Agency
 ITASPS Informal International Civil Aviation Organisation Trans Siberia, Trans Asia, Cross Polar Routes Steering
 Group (ICAO)
 ITB International Time Bureau (ITB) Bureau International de l'Heure
 ITC International Transit Code
 ITC Integrated Timing Concept
 ITC In-Trail Climb
 ITC International Trade Commission
 ITCZ Inter Tropical Convergence Zone
 ITD Integrated Technology Demonstrators
 iTEC Interoperability Through European Collaboration
 iTEC-FDP Interoperability Through European Collaboration -- Flight Data Processing
 ITF International Transport Workers Federation
 ITF In-Trail-Follow
 ITF International Transport Workers' Federation
 ITI Italian Interface
 ITID Individual Training- Instructor-dependent
 ITIL Information Technology Infrastructure Library
 ITIRS International Terrestrial Reference System
 ITL Integration Team Leader
 ITM Information Technology Management
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 EUROCONTROL AIRIAL
 Acronym Full form
 ITM Intermediate Approach controller
 ITMD Individual Training Material-dependent
 iTOPS initial Trajectory Operations (document)
 ITP Information Technology Provider
 ITP In-Trail Procedure
 ITQI IATA Training and Qualification Initiative
 ITR International Transit Route
 ITRF International Terrestrial Reference Frame
 ITRS International Terrestrial Reference System
 ITS Intelligent Transport Systems
 ITS IT Security System
 ITS Integrated Tower Systems
 ITSD IT Service Desk
 ITSEC Information Technology Security
 ITSM Information Technology Service Management
 ITSTC Information Technologie Steering Committee
 ITT Invitation to Tender
 ITT Invitation Property Rights
 ITU International Telecommunications Union (=UIT)
 ITU WARC-95 International Telecommunication Union World Radio Conference
 ITU-R International Telecommunications Union - Radio
 ITU-T International Telecommunications Union - Telecommunications
 ITU-T International Telecommunications Union - Telecommunication
 ITWP Integrated Tower Working Position
 ITY Interoperability
 IUCM IFPU Configuration Manager
 IUCM IFPS Unit Configuration Manager
 IUSO IFPU Security Officer
 IUSOAP ICAO Universal Safety Oversight Audit Programme
 IUT Implementation Under Test
 IVAO International Virtual Aviation Organisation
 IVATF International Volcanic Ash Task Force
 IVF Independent Variable Filter
 IVN Intervening Network
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 EUROCONTROL AIRIAL
 Acronym Full form
 IVR Immersive Virtual Reality
 IVSI Instantaneous Vertical Speed Indicator
 IVSN Initial Voice Switched Network
 IVV Independent Verification and Validation
 IVV Inertial Vertical Velocity
 IVVM IVV Manager
 IW Inter-Working
 IW Inter Network Function
 IWF Interworking Function
 IWG Interoperability Working Group
 IWGE International Working Group on (air) Exercises
 IWP Intermediate Waypoint
 IWP IFPS Working Position
 IWSO Instructor Weapons Systems Operator
 IWU Interworking Unit
 I²FPS Integrated Initial Flight Plan Processing System = Système intégré de traitement initial des plans de vol
 J/S Jammer/Signal level
 JAA Joint Aviation Authority, Joint Aviation Authorities (Autorités conjointes de l'aviation)
 JAA AMC JAA Acceptable Means of Compliance
 JAA OPS Joint Aviation Authorities Operations Committee
 JAA-TO JAA Training Office
 JAAB/JAA-B Joint Boards
 JAAC/JAA CE JAA Committee
 JAARC JAA Research Committee
 JAC Joint Airmiss Committee (UK)
 JAFTI JURG ADS-B Fast Track Initiative
 JAMC Joint Airspace Management Cell (UK)
 JAN JANuary
 JANE Joint Air Navigation Experiments
 JAOTF Joint AOT-ODSG Task Force
 JAPCC Joint Air Power Competence Centre
 JAR Joint Aviation Requirements
 JAR Joint Aviation Regulations
 JAR Joint Aviation Rules
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 EUROCONTROL AIRIAL
 Acronym Full form
 JAR-ATSOPS Joint Airworthiness Requirements-Air Traffic Services-Operations
 JAR-FCL Joint Aviation Requirements - Flight Crew Licensing (JAA)
 JAR-OPS Joint Aviation Requirements - Operations
 JARUS Joint Authorities for Rulemaking on Unmanned Systems
 JATCC Joint Air Traffic Control Centre
 JATCRU Joint Air Traffic Control Radar Unit
 JATR Joint Authorities Technical Review
 JAVA Java Programming language
 JBP Joint SCF-ANSB Business Planning Working Group
 JCAB Japanese Civil Aviation Bureau
 JCB Joint Coordination Board
 JCD Joint Committee for Disputes (commission paritaire des litiges)
 JCL Job Control Language
 JCOD code allocation overview
 JCTF (EUROCONTROL) Just Culture Task Force
 JD TF Job Description Task Force
 JFADT Joint Future Airspace Design Team
 JFCS Flight Conflict Store (contains all displayed conflicts)
 JFK John F. Kennedy (Airport in New York)
 JFPS Flight Plan Store (all details of all active flights)
 JFSS Flight Segment Store (every Route Segment in all Active CPLs)
 JFT Job File Table
 JHCT Hash Code Table (list of all SPN, & Active + Inactive CPLs)
 JHTS Height Track Store
 JIAAC Junta Investigadora de Accidentes de Aviación Civil = Venezuelan Civil Aviation Accident Investigation Board
 JIPS Internal Points Store (entry & Exit points of MATRAC area)
 JISSA Joint International Symposium on Sensors and Systems for Airport Surveillance
 JIT Joint Implementation Team (chaired by EUROCONTROL) (ESCO) MADAP/KARLDAP
 JITSO Joint Technical Standard Order
 JITT Initiation Track Table (SSR plots which can initiate tracks)
 JLLOG Retry store for SEROS and PHAROS messages
 JLSS Lower Segment Store (derived lower airspace route segments)
 JLTS Local Track Store (list of all confirmed LTBs)
 JMATS Joint Military Air Traffic Services
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 EUROCONTROL AIRIAL
 Acronym Full form
 JMC Job Management Committee
 JMDS Message Display Store (all ECM)
 JMP Joint Master Plan
 JMS Java Messaging Service
 JMT Job Management Team
 JMWS Multiple radar Weather Store (quantity of weather vectors).
 JOINT Joint Operational Incidents Training
 Joint WP EUROCONTROL-EASA Joint Work Programme
 JOT Joint Operational Team (ESCO)
 JPALS Joint Precision Approach Landing System
 JPDA Joint Probabilistic Data Association (ARTAS)
 JPDO Joint Programme Development Office (US NextGen)
 JPDO Joint Planning and Development Office (US)
 JPEG Joint Photographic Expert Group
 JPLM Joint Programme manager Level Meeting
 JPO Joint Programme Office
 JPTS Departure Suspense Message Store, (OAT only)
 JRC Joint Research Centre (Centre commun de recherche)
 JRC Joint Research Centre (Centre commun de recherche)
 JRC Joint Report Committee (comité paritaire des rapports)
 JRC Joint Report Committee (comité paritaire des rapports)
 JRPS Reporting Point Store (list of all RPs + active CPL TPs)
 JRSS Route Segment Store (list of all route segments)
 JSD Jackson Structured Design
 JSON JavaScript Object Notation
 JSP Joint Services Publication
 JSSG Joint Service Specification Guide (US)
 JSSI JAA's Safety Strategy Initiative
 JST Japan Standard Time (GMT+0900)
 JST Joy Stick
 JTC Joint Technical Committee
 JTC1 Joint technical Committee Number 1
 JTFS Track Flight Store (list of all CTBs)
 JTI Joint Technology Initiative
 Page 238
 EUROCONTROL AIRIAL
 Acronym Full form
 JTIDS Joint Tactical Information Distribution System
 JTM Job Transfer and Manipulation
 JTPS Temporary Plot Store (plots awaiting association with tracks)
 JTRS Joint Tactical Radio System
 JTSB Japan Transport Safety Board
 JTSO JAA Technical Standard Order
 JTST JeTSTream
 JU Joint Undertaking
 JUL JULy
 JUN JUNe
 JURG Joint Users Requirements Group (EUROCONTROL Representative in the IATA/AEA )
 JVM Java Virtual Machine
 JWP Joint Work Programme (EUROCONTROL - EASA)
 k SI symbol for kilo- (1000)
 K Kelvin
 KABA Kontrastive Aufgabenanalyse in Büro (DE) / Contrastive Task Analysis of Office Workplaces
 KAR Karlsruhe
 KARLDAP Karlsruhe Automatic Data Processing and Display System (replaced by VAFORIT as of December 2010)
 KAZAERONAVIGATSIA ANSP Kazakhstan
 KB kilobyte (more properly abbreviated to "kB")
 kB kilobyte
 KBPS kilobit per second (usually abbreviated to "kbps")
 kbps kilobits per second
 KBS Knowledge-Based System
 kByte kilobyte
 kc/s kilocycles per second (= kHz)
 KCAS Knots (calibrated air speed)
 KD1 Keyboard and Display window (1)
 KDS Keyboard Display Station (MADAP)
 KDS Keyboard Display System (Station)
 KE control Elm (transmit or acknowledge)
 KE Control ELM (field)
 KEA Average horizontal en-route flight efficiency of the actual trajectory
 KECU Thousands of European Currency Units
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 EUROCONTROL AIRIAL
 Acronym Full form
 KEMA Keuring van Elektrotechnische Materialen (NL)
 KEP Average horizontal en-route flight efficiency of the last filed flight plan
 KFOR Kosovo Force
 KfV Kuratorium für Verkehrssicherheit (AT) / The Austrian Traffic Safety Board
 kg kilogram(s)
 kHz kilohertz
 KIAS Knots Indicated Air Speed
 KIDS Karlsruhe Interim DCTS
 KIS Keyboard Input Station
 KIS Keyboard Input Station (CCTV)
 KISS Keep It Short and Simple
 KLDAP KARLDAP + Langen (D)
 KLM Royal Dutch Airlines
 KLOC thousand lines of code
 KLU Koninklijke Luchtmacht (NL) - Royal Dutch Air Force
 km kilometre
 KM kilometre (SI designation should be km)
 Km/h kiliometres per hour
 KMH kilometres per hour
 KNMI Koninklijk Nederlands Meteorologisch Instituut (NL) / Royal Netherlands Meteorology Institute
 KNW KNoWn
 KOX Karlsruhe Operational telephone eXchange
 KP KePt
 KP Start of Pulsing
 kPa kilopascal(s)
 KPA Key Performance Area (Domaine-clé de performance) (PRC)
 KPI Key Performance Indicator (indicateur-clé de performance)
 KPT Karlsruhe Planning Team
 KR Knowledge of Result
 KR 20 A measure of the internal consistency, or homogeneity, or scalability, of a test material (Ferguson, 1976).
 KRA Key Risk Area
 KSA Knowledge, Skills, Abilities
 KSAO Knowledge, Skills, Abilities, and Other personal requirements
 KSD Kontrollstreifendruck (DE)
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 EUROCONTROL AIRIAL
 Acronym Full form
 KSDS Key Sequence Data Set
 KSR Keyboard Send/Receive
 kt knots (i.e. 1 NM/hour)
 KT knots (i.e. 1 NM/hour)
 kt knot = NM/hour, unit of speed
 KT KnoTs (Nautical Miles per Hour)
 KTAS Knots (true air speed)
 KTD Keyboard Tabulator Display
 KUAC Karlsruhe Upper Aispace Control Centre
 KUG KPI User Group (Groupe des utilisateurs des KPI)
 Kurtosis A term which refers to the flatness or peakedness of one distribution in relation to another (Ferguson, 1976).
 KVS Keep (Maintain) Vertical Speed
 kW kilowatt
 KYB Keyboard
 KybCmd KeYBoard CoMmanD
 L Tones injected by the local switch
 L Left (N-FDPS)
 L Locator
 L Luxembourg
 L Left (runway ID)
 L-AII Legacy-Accuracy Improvements Initiative
 L-band L-band (frequency band within which SSR is found)
 L-Band Frequency Range
 L-NAV Lateral Navigation
 L/T Long-Term
 L1 GPS Signal Frequency (1575.42 MHz)
 L1K GLONASS Central Frequency (1.602 GHz) and channel number separator (k)
 L2 GPS Signal Frequency (1227.60 MHz)
 L2 Layer 2
 L2 CL L2 Civil-Long Code
 L2 CM L2 Civil-Moderate Code
 L2K GLONASS Central Frequency (1.246 GHz) and channel number separator (k)
 L2TP Layer 2 Tunnelling Protocol
 L3 Layer 3
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 EUROCONTROL AIRIAL
 Acronym Full form
 L5 (Proposed) GPS Signal Frequency (1176.45 MHz)
 LA Limited Airspace
 LA LAN Adapter
 LA Logical Address
 LA Local Action
 LA Local Area
 LA(M) Lifecycle Architecture (Milestone)
 LA-MLAT Local Area 9 Multi-lateration
 LAA Laboratoire d'Anthropologie Appliquée (FR)
 LAA Local Area Augmentation
 LAADR Low Altitude Arrival/Departure Routing.
 LAAQ Layover Assessment Adjustment Questionnaire
 LAAS Local Area Augmentation System
 Lab Laboratory (sound or multimedia)
 LAB Legal Advisory Board
 LAB LABel conflict management (DCP)
 LABEL Allocate a callsign to an indicated LABEL
 LAC Luxembourg Assistant Controller
 LACAC Latin American Civil Aviation Commision
 LACC London Area Control Centre
 LACK Logical Acknowledgement
 LACK positive logical response message used for air/ground data communications, as defined within the ICAO
 Manual for ATS Data Link Applications
 LAD Look Ahead Display
 LADA Local Agency Directory Administrator
 LADGNSS Local Area Differential GNSS
 LADGPS Local Area Differential Global Positioning System
 LAF Local Adaptation Functions (MADAP)
 LAHSO Land & Hold Short Operations
 LAM Ljubljana ATC Data Processing System
 LAM Local Area Multi-lateration
 LAM Logical Acknowledgement Message (OLDI)
 Lambda (Greek letter, lower case) Symbol for wavelength
 LAMOS Local ARTAS Maintenance and Operational Support
 Page 242
 EUROCONTROL AIRIAL
 Acronym Full form
 LAMPS long-term ATCO Manpower Planning Simulation
 LAN Local Area Network / Réseau local
 LAN NMS Local Area Network Management System
 LANDA Logistics and Administration
 LANE LAN Emulation
 LANSU Local Air Navigation Service Unit (DFS)
 LAP Lower Airspace Project
 LAP Link Access Protocol
 LAPB Link Access Procedure, Balanced
 LAPD Link Access Protocol -D Channel
 LAPF Link Access Protocol - Frame Relay
 LAPL Light Aircraft Pilot License
 LAPM Link Access Protocol -Modem
 LAQ Local Air Quality
 LAR/LRR Long Range Radar
 LARA Local and Regional ASM application / gestion locale et régionale de l'espace aérien
 LARS Lower Airspace Radar Service
 LAS Lower Airspace Sector
 LAS Linked comm-A Subfield
 LAS Linked A Sub-field
 LAS Limited Airspace
 LAS Last Assigned Landing Slot
 LASCR Light Activated SCR
 LASER Light Amplification by Stimulated Emission of Radiation
 LASKA Learning And Skills Acquisition
 LASPP Local Advisor on Service for Protection and Prevention
 LASS Local Area Augmentation System
 LAST Light Aviation SSR Transponder
 LAT Last Transfer
 LAT Latitude
 LAT Local Area Transport
 LATC Local Air Traffic Control
 LATCC London ATC Centre (old denomination)
 LATCO Licensing of Air Traffic Control Officers (ICAO Study Group)
 Page 243
 EUROCONTROL AIRIAL
 Acronym Full form
 LATO Landing and Take-Off (subgroup of Navigation Steering Group)
 LAU Local Approach Unit
 LAVA Large Scale Validation of Cooperative Air Traffic Management
 LAW Aviation Law
 LAWRS Limited Aviation Weather Reporting Station
 LAYER filter for height banding of mode c equipped tracks
 LB Load Balancing/Balancer
 LB Local Battery (circuits)
 LB pound(s) weight
 LBA Luftfahrtbundesamt (D)
 LBAC Logical Burst Access Channel
 LBS Linked comm-B Subfield
 LC Low Capacity
 LC Light Control
 LCA Local Competence Assessor
 LCAM Load Control and Messaging
 LCC Luxembourg Coordinating Controller
 LCC low-cost carrier
 LCC Lifetime Cycle Costing
 LCCS Local Control and Correction Station
 LCD Liquid Crystal Display
 LCG Load Classification Group
 LCIP Local Convergence and Implementation Plan (plan local de convergence et de réalisation) (now replaced by
 LSSIP)
 LCIPD Local Convergence and Implementation Plan Document (now replaced by LSSIP (documents))
 LCK Line Check Message
 LCM Late Change (modification) Message (designator) (IFPS)
 LCM Label Conflict Management (N-FDPS)
 LCN Load Classification Number
 LCN Local Communications Network
 LCn Low Capacity needs
 LCP Left Circular Polarisation
 LCPP Local Committee for Prevention and Protection at Work (comité local pour la prévention et la protection au
 travail - CLPP)
 LCR Least Cost Routing
 Page 244
 EUROCONTROL AIRIAL
 Acronym Full form
 LCTR large commercial tilt-rotors
 LCU Lan Control Unit
 LD Line Detector
 LD Loop Disconnect
 LDA Landing Distance Available
 LDA Localizer-type Directional Aid (USA)
 LDA WG Library, Documentation and Archive Working Group
 LDACS L Band Digital Aeronautical Communications System
 LDAP Lightweight Directory Access Protocol
 LDB Limited Data Block
 LDCELP Low-Delay Code Excited Linear Prediction
 LDG LanDinG
 LDGNSS Local Differential Global Navigation Satellite System
 LDI Landing Direction Indicator
 LDIN Lead-in-light system
 LDL L-band Data Link
 LDM Limited Distance Modem
 LDPA Low Duty Cycle Power Amplifier
 LDPU Link and Display Processing Unit
 LDR Landing Distance Required
 LDR Light Dependent Resistor
 LDRP Local Display Recording and Playback
 LDT Logistic Delay Time
 LDU Link Diagnostic Unit
 LE Link Establishment
 Lec Lecture
 LEC Local Exchange Carrier
 LEC Luxembourg Executive Controller
 LED Light Emitting Diode
 LEFCO Project for the procurement of new ATM facilities in Nicosia ACC
 LEFD Local Essential Flight Details (MADAP)
 Lempel-Ziv-Welch LZW
 LEN Field Length indicator
 LEN Length Indicator
 Page 245
 EUROCONTROL AIRIAL
 Acronym Full form
 LEN Low Entry Networking
 LENGTH LENGTH of the Data Block
 LENNUAMET Estonian CAA
 LEO Low Earth Orbit
 LEONARDO Linking Existing On-Ground Arrival and Departure Operations
 LEOS Low Earth Orbiting System
 LEOs Low Earth Orbit Satellites
 LEP Linear Error Probability
 LEPC Left-hand Enhanced Planning Console
 LER Label Edge Router
 Les Lesson / Demonstration
 LF Line Feed
 LF Low Frequency
 LF Late Filer (IFPS)
 LFAA Logical Functional ATFCM Areas
 LFC (Swedish) Air Defence Centre or (unit)
 LFE Local File Editing
 LFHB Low Flying Handbook
 LFL Last (reported) Flight Level
 LFN Lufthansa Flight Nav (European Datahouse)
 LFN Local Fixed Node
 LFP Low Pass Filter
 LFPP Limited Flight Plan Processing
 LFR Low-level Flight Rules
 LFS Level Flight Spacing
 LFS Low-Fidelity Simulation
 LFU Late Filer and Updater
 LFV Luftfartsverket (SE) (CAA of Sweden)
 LGF LAAS Ground Facility
 LGS Latvijas Gaisa Satiksme, Latvia
 LGT LiGhT(ing)
 LGTD LiGhTeD
 LgUM Longitudinal acceleration Uniform Motion
 LGW London Gatwick Airport
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 EUROCONTROL AIRIAL
 Acronym Full form
 LHCP Left Hand Circular Polarisation
 LHR London Heathrow (UK)
 LI Length Indicator
 LIC Pilot Licensing
 LICI Link Interface Control Information
 LIDAR Light Detection and Ranging
 LIDO Lufthansa Integrated Dispatch Operation
 LIDU Link Interface Data Unit
 LIE Lateral Intent Error
 LIF Loading Instruction Form
 LIFO Last In First Out
 LIH Light Intensity High
 LIL Light Intensity Low
 LIM Light Intensity Medium
 LIM/MID/RAN Limited Middle East Regional Air Navigation Conference (ICAO)
 LINK 2000+ LINK 2000+ Programme
 LINK2000 LINK 2000 Programme (EATMP Programme)
 LIO Luxembourg Input Operator
 LIP Light-pen
 LIR Local Internet Registry
 LIRL Low Intensity Runway Lights
 LIS Logical IP Subnets
 LISATM Lisbon Air Traffic Management
 LISP List Processing
 LISREL Linear Structural Relations
 LIT LINK Integration Team
 LIT Light Transfer
 LITL Low Intensity Taxiway Lights (USA)
 LIW Label Input Window
 LL Label Line (N-FDPS)
 LL LAT-LON (N-FDPS)
 LLC Logical Link Control (RMCDE)
 LLC Link Layer Control
 LLC-1 Logical Link Control 1
 Page 247
 EUROCONTROL AIRIAL
 Acronym Full form
 LLC-I Logical Link Control - Class I
 LLC1 Logical Link Layer
 LLM L-band Land Mobile
 LLR Low-Level Routes
 LLT Low-Light Television
 LLTR Low-Level Transit Route
 LLWAS Low-Level Windshear Alert System
 LLZ Localizer (part of ILS system)
 LM Layer Management
 LM Logistics Manager
 LM Locator, Middle
 LM Low/Medium ATC Complexity
 LMA Load Measurement Analysis
 LMC Local Monitoring and Control
 LMCF Local Monitoring and Control Facility
 LME Link Management Entity
 LMO Leadership Management and Organisation (EATCHIP)
 LMP Link Management Processor
 LMP Link Management Protocol
 LMS Learning Management System
 LMT Local Mean Time
 LN AMP Low Noise Amplifier
 LNA Low Noise Amplifier
 LNA/DPLX Low Noise Amplifier/Diplexer
 LNAV Lateral Navigation
 LNG LoNG (Describing approach type required)
 LNO Olno (Belgium sector indication)
 LO Local Oscillator
 LO Liaison Officer
 LO Lockout override
 LO Locator, Outer
 LO(M) Lifecycle Objectives (Milestone)
 LoA Letter of Agreement (Lettre d'accord)
 LOA List of Abbreviations
 Page 248
 EUROCONTROL AIRIAL
 Acronym Full form
 LOA Letter of Offer and Acceptance
 LOA Letter of Acceptance
 LoA Line of Action
 LOAT Level of Automation Taxonomy
 LOBT Last received Off Block Time
 LOC Loss of Control
 LoC Lines of Change
 LOC Lines of Communications
 LOC LOCation, LOCal(ly), LOCated
 LOC Localiser
 LOD Level of Detail
 LOF Log-On Forwarding message (OLDI)
 LoFA Longitudinal acceleration Fast Acceleration
 LoFD Longitudinal acceleration Fast Deceleration
 LOFT Line-Orientated Flight Training
 LOG Logging Component (Subsystem of BSC)
 LOHSO see LSPPA
 LoL List of Lots
 LoL Loss of Licence
 LOLI Loss of Licence Insurance (scheme)
 LOM Locator Outer Marker
 LON Launch on Need
 LON Longitude
 LOND London FMU
 LONG Longitude
 LOP Local Operating Procedure
 LOPAR Low Powered Acquisition Radar
 LORAN LOng Range Air Navigation
 LORAN Long Range Navigation
 LORAN Long Range Aids to Navigation
 LORAN-C Long Range Navigation /Hyperbolic Navigation System
 LORD Lateral Obstacle & Resolution Display (alternatively Left Or Right Display)
 LORD Leading Optimised Runway Delivery
 LOS Line of Sight
 Page 249
 EUROCONTROL AIRIAL
 Acronym Full form
 LOS Level of Safety
 LOS Lockout Subfield
 LoSA Longitudinal acceleration Slow Acceleration
 LOSA Line Operations Safety Audit
 LoSD Longitudinal acceleration Slow Deceleration
 LOSR Line Of Sight Range
 LoTA Longitudinal acceleration Typical Acceleration
 LoTD Longitudinal acceleration Typical Deceleration
 LOW Lower airspace
 LP Light Pen
 LPC Less Paper Cockpit (Airbus)
 LPC Linear Predictive Coding
 LPDU Link Protocol Data Unit
 LPE Language Proficiency Endorsement
 LPL Lateral Protection Limit
 LPS Letové Prevádzkové Sluzby Slovenskej Republiky (Slovakia ATC Authority)
 LPTF Laboratoire Primaire du Temps et des Fréquences
 LPV localizer performance with vertical guidance
 LPV Lateral Precision with Vertical Guidance Approach
 LQ Listening Quality
 LR Linear Regression
 LRC Legal Requirement Cell
 LRC Legal ReCording (of MADAP data)
 LRD Long Range crossborder DCT
 LRE Linguistic Research & Engineering
 LREF Local Reference
 LRI Legal Recording Investigation
 LRI Légiforgalmi és Repülétéri Igazgatóság (Hungarian ATS provider)
 LRIP Low Rate Initial Production
 LRL Local Recording Logistics
 LRM Logical Rejection Message
 LRM Line Replaceable Module
 LRNZ Luftraumnutzungszentrale (DE) / Airspace and traffic management centre
 LRPS Local Recording and Playback System
 Page 250
 EUROCONTROL AIRIAL
 Acronym Full form
 LRR Long Range Radar (SRE)
 LRRS Last Resort Radar System
 LRS Local Route Sequence
 LRST Local Runway Safety Team
 LRTAP Long-range Transboundary Air Pollution
 LRU Lowest Replacable Unit
 LRU Line Replaceable Unit
 LRW Long-Range Warning (IFPS)
 LRY standby Legal Recording (for LRC)
 LS LoudSpeaker
 LS DAI DAI LoudSpeaker
 LS RTB R/T Backup LoudSpeaker
 LSA Logistic Support Analysis
 LSA Lowest Safe Altitude
 LSA Localiser Sensitive Area
 LSA Leave Savings Account (Rule of Application No. 36) (Compte épargne-temps)
 LSA Leave Savings Account (Rule of Application No. 36)
 LSB Least Significant Bit
 LSC Life Support Cost (Cyprus)
 LSC Local Staff Committee (comité local du personnel - CLP)
 LSC Local Signalling Channel
 LSCM Local System Control and Monitoring
 LSCMIO Local System Control & Input/Output Monitoring
 LSD LSE Support Document
 LSDU Link Service Data Unit
 LSE Local System Expert
 LSK Longitudinal Station Keeping
 LSP Logistics Support Plan
 LSP Label Switch Path
 LSP Link State Protocol
 LSP Loud Speaker
 LSP Local Status Panel
 LSPPA Local Service Protection and Prevention Advisor
 LSSI Local Single Sky Implementation (now replaced by LSSIP)
 Page 251
 EUROCONTROL AIRIAL
 Acronym Full form
 LSSIP Local Single Sky Implementation (mechanism / documents) (replaces LCIP) (réalisation du ciel unique au
 niveau local)
 LST Traffic Listing
 LSU Lone Signal Unit
 Lt Sequence Time Requirement
 LT Local Time
 LT Lithuania (ISO Country Code)
 LT Long-Term (& Innovative Research)
 LTB Local Track Block
 LTD LimiTeD
 LTE Line Terminating Equipment
 LTF Long-term forecast
 LTF Licensing Task Force
 LTIOV Latest Time Information of Value
 LTIP Long-Term Investment Plan (plan d'investissement à long terme) (NM)
 LTM Local Traffic Management
 LTM long-term Memory
 LTO Landing and take-off Cycle
 LTOG long-term Objectives Groups (EASIE, PHARE, FEATS, COPS etc)
 LTP Legal and Technical Panel
 LTP Landing Threshold Point
 LTSS long-term Systems Studies
 LTV Load Threshold Values
 LU Local User
 LU Logical Unit
 LU Late Updater
 LU Logical User
 LU Luxembourg
 LUC Line-up Clearance
 LUF Lowest Usable Frequency
 LUF Luxembourg Francs
 LUG Leerdam Users' Group
 LUGS Link up Glons-Semmerzake
 LUI Logical Unit Interface
 Page 252
 EUROCONTROL AIRIAL
 Acronym Full form
 LUPT Line Up Time
 LUT Line Up Time
 LUX Luxembourg (ISO countries Code)
 LV Length of User Data (field)
 LV Laser Vision
 LV Latvia (ISO 2 character country Code)
 LV Last Value
 LV Length of Packet Header field
 LVA Large Vertical Aperture
 LVB Luchtverkeersbeveiliging (RLD-NL)
 LVC Low Visibility Conditions
 LVL LeVeL
 LVNL Luchtverkeersleiding Nederland (Netherlands Air Traffic Control)
 LVO Low-Visibility Operations (Exploitation en conditions de faible visibilité)
 LVP Low-Visibility Procedures
 LVTO Low-Visibility Take-off
 LWG Licensing Work Group
 lwp Lone Worker Protection
 LWR LoWeR
 LZW Lempel-Ziv-Welch (compression)
 M Many-to-Many relationship
 M Modules (replaceable)
 M Management
 M Symbol for Mega (10+6)
 m Symbol for milli (10-3)
 m Metres (preceded by figures)
 M-ADS Modified Automatic Dependent Surveillance (ICAO)
 M-Code New GPS military code
 M-MMC Military Mission Management Computer (A 400 M)
 M-PSK M-level Phase Shift Keying
 M-XFL Maastricht Exit Flight Level (N-FDPS)
 M... prefix to the Mach number applying to the flight
 M/CH Msp CHannel number
 M/F Mainframe
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 EUROCONTROL AIRIAL
 Acronym Full form
 m/sec Metres per second
 M/T Medium-Term
 MA Message Assurance
 MA Morocco (ISO Countries Codes)
 MA Message-A (field)
 MA Message Area
 MA Membership Agreement (Accord d'adhésion) (SESAR-JU)
 MA Member Association
 MA-AFAS More Autonomous Aircraft in the Future Air Traffic Management System
 MA1 dynamic MAp 1
 MA2 dynamic MAp 2
 MAA Maximum Authorised Altitude
 MAAFAS More Autonomous Aircraft in the Future ATM System
 MAAP Maastricht Administrative Automation Plan
 MAAS/ATM Maastricht Upper Area Control Centre/Air Traffic Management (Centre de contrôle de l'espace aérien
 supérieur de Maastricht/domaine ATM)
 MAAS/ATM/ATD Maastricht Upper Area Control Centre/Air Traffic Management/ATM Development (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/domaine ATM/Développement de l'ATM)
 MAAS/ATM/CHG Maastricht Upper Area Control Centre/Air Traffic Management/Change Management (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/domaine ATM/Gestion du changement)
 MAAS/ATM/CO Maastricht Upper Area Control Centre/Air Traffic Management/Current Operations (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/domaine ATM/Exploitation courante)
 MAAS/ATM/FCS Maastricht Upper Area Control Centre/Air Traffic Management/Facilities (Centre de contrôle de l'espace
 aérien supérieur de Maastricht/domaine ATM/Installations)
 MAAS/ATM/STR Maastricht Upper Area Control Centre/Air Traffic Management Strategy (Centre de contrôle de l'espace aérien
 supérieur de Maastricht/domaine ATM/Stratégie ATM)
 MAAS/ATM/TRG Maastricht Upper Area Control Centre/Air Traffic Management/ATM Training (Centre de contrôle de l'espace
 aérien supérieur de Maastricht/domaine ATM/Formation ATM)
 MAAS/ATM/TS Maastricht Upper Area Control Centre/Air Traffic Management/Technical Systems (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/domaine ATM/Systèmes techniques)
 MAAS/DIR Maastricht Upper Area Control Centre/Directorate (Centre de contrôle de l'espace aérien supérieur de
 Maastricht/direction)
 MAAS/DIR/HSM Maastricht Upper Area Control Centre/Directorate/Health and Safety (Centre de contrôle de l'espace aérien
 supérieur de Maastricht/direction/service "Hygiène et sécurité")
 MAAS/DIR/LPA Maastricht Upper Area Control Centre/Directorate/Legal, Procurement and Accounting (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/direction/service "Questions juridiques, acquisitions et comptabilité")
 MAAS/DIR/MAKC Maastricht Upper Area Control Centre/Directorate/Maastricht ATM Knowledge Centre (Centre de contrôle de
 l'espace aérien supérieur de Maastricht/direction/Centre de connaissances ATM de Maastricht)
 Page 254
 EUROCONTROL AIRIAL
 Acronym Full form
 MAAS/DIR/SEC Maastricht Upper Area Control Centre/Directorate/Secretary Pool (Centre de contrôle de l'espace aérien
 supérieur de Maastricht/direction/ Équipe de secrétaires)
 MAAS/DIR/SPM Maastricht Upper Area Control Centre/Directorate/Strategy and Performance Management (Centre de
 contrôle de l'espace aérien supérieur de Maastricht/direction/Gestion de la stratégie et des performances)
 MAAS/DIR/SQS Maastricht Upper Area Control Centre/Directorate/Safety, Quality and Security Management (Centre de
 contrôle de l'espace aérien supérieur de Maastricht/direction/service "Gestion de la sécurité, de la qualité et de
 la sûreté")
 MAAS/DIR/SSM/HRM Maastricht Upper Area Control Centre/Directorate/Support Services Management/Human Resources
 Management (Centre de contrôle de l'espace aérien supérieur de Maastricht/direction/service "Gestion des
 services d'appui"/service "Gestion des Ressources Humaines")
 MAAS/DIR/STK Maastricht Upper Area Control Centre/Directorate/Stakeholder Relations (Centre de contrôle de l'espace
 aérien supérieur de Maastricht/direction/service "Relations avec les partenaires")
 MAB Military ATM Board (Conseil ATM militaire)
 MAC Management Advisory Committee
 MAC Military Airlift Command
 MAC Media/Medium Access Control
 MAC Mid-Air Collision
 MAC Medium/Media Access Control (RMCDE)
 MAC Message Authenication Code
 MAC Message for the Abrogation of Coordination (OLDI)
 MAC Message for the Abrogation of Coordination
 MACC Military Area Control Centre
 MACC Manchester Area Control Centre
 MACE Malvern Capacity Estimate
 MACE Multi-criteria analysis for Concept Evaluation
 MACEN Mando Centra
 MACH Speed relative to the speed of sound
 MACS Multiple Access Communications System
 MAD Model of Activity for Design
 MAD Manual Activation Device
 MADaMS Mode S & ACAS Data Management System
 MADAP Maastricht Data Processing and Display System (Système de traitement et d'affichage automatique des
 données du Centre de Maastricht)
 MADARS Maastricht Data Analysis and Reporting System
 MADR Madrid FMU
 MADREC Maastricht Data Recording
 MAESCAPE EUROCONTROL Simulation Capability and Platform for Experimentation tailored to Maastricht UAC
 requirements
 Page 255
 EUROCONTROL AIRIAL
 Acronym Full form
 MAESTRO Means to Aid Expedition and Sequencing of Traffic with Research and Optimisation / Moyen d'Aide à
 Ecoulement Séquencé du Trafic avec Recherche d'Optimisation
 MAEVA Master ATM European Validation Plan
 MAG Magnetic
 MAG LBL Magnified Label (N-FDPS)
 MAGA serious illness relative in the ascending line (maladie Grave ascendant et collatéraux)
 MAGB serious illness cohabiter (maladie grave concubin) (CHRONOTIME)
 MAGC serious illness spouse (maladie grave conjoint) (CHRONOTIME)
 MAGE serious illness child (maladie grave enfant) (CHRONOTIME)
 MAGF serious illness child of cohabiter (maladie grave enfant du concubin) (CHRONOTIME)
 MAGIC Manager of Air-Ground Interface Communications
 MAGP serious illness cohabiter parent (maladie grave parent du concubin) (CHRONOTIME)
 MAHF Missed Approach Holding Fix
 MAHWP Missed Approach Holding Waypoint
 MAICA Modelling and Analysis of the Impact of the Changes in ATM
 MAINT MAINTenance
 MAIS Maximum Abbreviated Injury Scale
 MAKC Maastricht ATM Knowledge Centre
 MALE Medium Altitude Long Endurance
 MALN uncertified sickness (maladie sans certificat) (CHRONOTIME)
 MALO certified sickness (maladie avec certificat) (CHRONOTIME)
 MALSF Medium-intensity Approach Lighting and Sequenced Flashing lights
 MALSR Medium Intensity Approach Lighting System with Runway Alignment Indicator Lights (USA)
 MAM Medium Area Multi-Lateration
 MAMMI Multi-Actor Man Machine Interface
 MAN Multiple Area Network
 MAN Manual Message
 MAN Metropolitan Area Network
 MANACT Manual Activation message
 MANACT MANual ACT
 MANL uncertified illness replaced (maladie sans certificat remplacé par congé) (CHRONOTIME)
 MANPADS Man-Portable Air Defence System (Système antiaérien portable)
 MANs Metropolitan Area Networks
 MANSUP Macedonian ANS Upgrade Project
 Page 256
 EUROCONTROL AIRIAL
 Acronym Full form
 MANTAS Maastricht ATC New Tools And Systems
 MANTEA Management of Surface Traffic at European Airports
 MAP Mapping
 MAP Meteo Aeronautical Charts
 MAP sdd video MAP(s)
 MAP Maintenance Action Plan
 MAP Missed Approach Procedure
 MAP Military Assistance Program
 MAP aeronautical MAP or chart
 MAPD Maximum Agreed Period of Disruption
 MAPI Messaging Application Programming Interface
 MAPSG Mode S & ACAS Programme Steering Group (Groupe de pilotage du Programme Mode S et ACAS)
 MAPt Missed Approach Point
 MAPT MUAC Annual Planning Tool
 MAR Mode-A Reconstructor
 MAR MARch
 MARA Maastricht Rating Training Project
 MARRES Manual Radar Return Exploitation System
 MARS Maastricht Reserve System
 MARS Monitoring And Reference Station
 MARS Military Air Route Structure
 MARSA Military Authority Assumes Responsibility for Separation of Aircraft
 MART Message Acknowledge Response Time
 MARTIN Maastricht Randomisation Tool for Intake Numbers
 MARTOS MADAP Real-Time Operating System
 MAS Message Assurance Service
 MAS Multiple Access Store
 MAS Military Agency for Standardisation
 MAS Multi-Source Acquisition Suite
 MAS (UAC) Maastricht Upper Area Control Centre
 MAS Manage Airspace
 MAS Manual Assume of Control Message (OLDI)
 MAS Middle Airspace
 MAS Manual ASsumption of communication
 Page 257
 EUROCONTROL AIRIAL
 Acronym Full form
 MAS Missed Approach Surface
 MAS Mode S and ACAS (Programme)
 MAS UAC Maastricht Upper Air Control
 MAS-TS MAaStricht Track Server
 MAS/E MAaStricht Engineering division
 MAS/H MAaStricht Hrfgs bureau
 MAS/O MAaStricht Operations division
 MASAW Minimum Safe Altitude Warning
 MASC Mediterranean Aviation Safety Cell
 MASOR Military Area Services Operations Room
 MASP Minimum Aviation Specification Performance
 MASPS Minimum Aviation/Aircraft System Performance Specification (ICAO)
 MASS Multi-Aircraft Simplified Simulator
 MASS Military Approach Surveillance System
 MAST Multi-Aircraft Simulation Terminal
 MAST 4 4 States Integration and Maastricht Development Steering Group
 MASUAC Maastricht Upper Area Control Centre (Centre de contrôle de l'espace aérien supérieur de Maastricht)
 MAT Message Acknowledge Time
 MAT Mackinnon-Aerospace and Training
 MATCC Military ATC Centre
 MATCOM Maastricht ATC Operations Manual
 MATD Minimum Approach-to-terrain Distance
 MATE Multi-Aircraft Training Environment
 MATIAS Magyar (Hungarian) Automated and Integrated Air Traffic Control System
 MATIP Mapping Airline Traffic over IP
 MATO Military Air Traffic Operations
 MATOS Modélisation et Allocation de Tâches entre Opérateur et Système (FR)
 MATRAC Military Air Traffic Radar (Control) Centre
 MaTraCpro Maastricht Trainee Career Progression
 MATS Manual of Air Traffic Services
 MATS Malta Air Traffic Services Ltd
 MATSE Meeting of ECAC Transport Ministers on the Air Traffic System in Europe (Réunion des Ministres de la CEAC
 sur le système de circulation aérienne en Europe)
 MATSOG Military Air Traffic Services Organisation Germany
 Page 258
 EUROCONTROL AIRIAL
 Acronym Full form
 MATWP Missed Approach Turning Waypoint
 MATZ Military Aerodrome Traffic Zone
 MAV Medium Access Control
 MAWP Missed Approach Waypoint
 MAX MAXimum
 MAY MAY
 MAZ Mini ASCAP-ZKSD Coupling
 MB Message-B (field)
 Mb Milibars
 mb millibar(s)
 MB megabyte
 MB MariBor
 MB Message for comm-B (data-field in downlink SLM)
 MB-II Multibus II (RMCDE)
 mbar millibar
 MBB Messerschmitt, Bölkow and Blöhm (DE)
 MBD Microwave Barrier Detector
 MBI Message Block Identifier
 Mbit/sec megabit per second
 MBO Management by Objectives
 Mbps megabits per second
 MBR Mittel-Bereich radar
 MBS Maximum Burst Size
 MBS Multisite comm-B Subfield
 MBS Mobile Broadcast Services
 MByte megabyte
 MC Main Computer
 MC Middleware Channel
 MC Medium Capacity
 MC Message-C (field)
 MC Message for comm-C (data-field in downlink SLM)
 MC Monaco (ISO Countries Code)
 Mc/s megacycles per second (= MHz)
 MCA Minimum Crossing Altitude
 Page 259
 EUROCONTROL AIRIAL
 Acronym Full form
 MCAC Military Common Area Control
 MCAS Manoeuvring Characteristics Augmentation System !Boeing)
 MCC Main Computer Complex (Maastricht)
 MCC Münster Coordinating Controller
 MCC Master Control Centre
 MCC Mission Control Centre
 MCC Military Control Centre
 MCCB Main Change Control Board
 MCCE Movement Coordination Centre Europe
 MCDA Multi-Criteria Decision Analysis
 MCDM Measure Collaboration Decision Making
 MCDU Multifunction Control and Display Unit
 MCDU Maintenance and Control Display Unit
 MCE Management Centre Europe (seminars/courses)
 MCF Manning Calculation Formula
 MCG Minimum Climb Gradient
 MCG Maastricht Coordination Group (groupe de coordination de Maastricht)
 MCH Modified Cooper-Harper rating scale for system workload assessment
 MCI Mobile Communication Infrastructure
 MCM Model Configuration Management
 MCMG Military Committee Meteorological Group
 MCn Medium Capacity needs
 MCP Mode Control Panel
 MCP Multifunction Control Panel
 MCP Management Control Point
 MCP Maximum Climb Power
 MCR Minimum Cell Rate
 MCRI Military Certification Review Item
 MCRR1 MuaC Reserve sector position [1]
 MCRR2 MuaC Reserve sector position [2]
 MCS Maintenance and Convergence to SESAR
 MCS Military Centre Supervisor
 MCS Master Control Station
 MCS Master Clock System
 Page 260
 EUROCONTROL AIRIAL
 Acronym Full form
 MCS Multi-Aircraft Cockpit Simulator
 MCS Monitoring and Control System
 MCSG Military Committee Staff Group
 MCT Maastricht Coordination Team
 MCTR Military CTR
 MCU Main Computer Unit
 MCU Main CWP-Unit
 MCU Modular Concept Unit
 MD Moldova (ISO 2 characters Country Code)
 MD Message D user data field
 md Man Day
 MD Message for comm-D (data-field in downlink SLM)
 MD Management Domain
 MDA Model Driven Architecture
 MDA Minimum Descent Altitude
 MDA Minimum Discernible Signal
 MDA Manageable Danger Area
 MDA/H Minimum Descent Altitude/Height
 MDB Minimal Detectable Bias
 MDC Maintenance Diagnostic Computer
 MDD Meteorological Data Distribution (function)
 MDF Main Distribution Frame
 MDG Mathematics Drafting Group
 MDH Minimum Descent Height
 MDI Manage Document Inputs
 MDI Minimum Departure Interval
 MDI Multiple Document Interface
 MDM Master Data Management
 MDNS Managed Data Network Service
 MDP MADAP Data Processor
 MDP Maastricht Development Plan
 MDP Madap Data flight Plan
 MDS Minimum Detectable Signal
 MDS Management Document Storage
 Page 261
 EUROCONTROL AIRIAL
 Acronym Full form
 MDS Multistatic Dependent Surveillance
 MDT Maintenance Data Terminal
 MDT Mission Development Trajectory
 MDT Mean Down Time
 ME Message E data field
 ME Message Editing
 MEA Minimum En-route Altitude (ICAO)
 MEB Main Earthing Bar
 MEC Münster Executive Controller
 MEC FG Military European Convergence and Implementation Plan (ECIP) Focus Group
 MECA Model for the Economical evaluation of the Capacities of the ATM system
 MECO Muac East sector position
 MECO Main Engine Cutoff
 MECU Millons of ECU
 MED Aviation medicine
 MEDA Maintenance Error Decision Aid
 MEDA (MEDA I, MEDA
 II)
 [the financial instrument of the Euro-Mediterranean Partnership] - MEDA 12 : Algeria, Cyprus, Egypt, Israel,
 Jordan, Lebanon, Malta, Morocco, the Palestinian Territory, Syria, Tunisia and Turkey.
 MEDICIS Mécanisme d'Echange et de Diffusion d'Information Cartes Inter Systèmes (FR)
 MEDLL Multipath Delay Lock Loop
 MEDUP Mediterranean Upgrade Programme
 medusa MEthoDology for the U-Space Safety Assessment
 MEF Minimum Essential Facilities
 MEFISTO Modelling, Evaluating and Formalising Interactive Systems using Tasks and Interaction Objectives
 MEG Magnetoencephalography
 MEHT Minimum Eye Height over Threshold (in VASIS context)
 MEL Minimum En-route Level
 MEL Minimum Equipment List
 MEMPAC CBT on Memory, Perception, Cognition and Attention
 MEMS Microelectromechanical Systems
 MEO Medium Earth Orbit
 MEOs Medium Earth Orbit Satellites
 MEP Maastricht Exchange Position
 MEP Muac East sector Position
 Page 262
 EUROCONTROL AIRIAL
 Acronym Full form
 MEP Manual Exchange Position
 MEP Military Engagement Plan
 MEPAC MuAC East sector Position
 MEPC Muac East Planning Coordinator
 MEPS Military Engagement Plan for SESAR
 MERC1 Muac East sector position
 MERC2 Muac East sector position
 MERISE Méthodes Eprouvées de Ralentissement Important et Significatif des Etudes (FR)
 MERR Muac East sector position
 MES Multi-site Elm Sub-field
 MES Mobile Earth Stations
 MES Mobile Earth Station
 MET Meteorological or request METAR
 MET Meteorological services for air navigation (Services météorologiques pour la navigation aérienne)
 MET Meteorology/Meteorological information
 MET SVC METeorological SerViCes
 MET/AIS Meteorological and Aeronautical Information processing System
 MET/TF Task Force on the Allocation of Meteorological Costs to Civil Aviation Users
 METAR METeorological Aerodrome or Aeronautical Report
 METCE Modèle pour l'Échange des informations sur le Temps, le Climat et l'Eau (WMO)
 MEU Medical Examination Unit
 MEURO Millions of EURO
 MF Multi-Frequency
 MF Multiplication Factor
 MF More Frames
 MF More Fragments
 MF Manning Factor
 MF Metering Fix
 MF Multi-Field
 MF Medium Frequency (300 kHz - 3 MHz)
 MF-format MF Address Format
 MFA Minimum Flight Altitude
 MFA Multi-factor Authentication
 MFA Message Format Area
 Page 263
 EUROCONTROL AIRIAL
 Acronym Full form
 MFA Multilateral Framework Agreement (Accord-cadre multilatéral) (SESAR JU)
 MFA1 cpl Message Format Area gat
 MFA1O cpl Message Format Area Oat
 MFAL Major Functional Areas List (ODS)
 MFC Multi-Frequency Coding (telephone system)
 MFC Multi Format Converter
 MFC Multi Frequency Compelled
 MFC-R2 Multi-Frequency Compelled - R2
 MFC-R2 Multi-Frequency Compelled R2
 MFC/LB Multi-Frequency Coding / Local Battery
 MFD Multi-Function Display
 MFD Main Function Display
 MFD Mini Flight Data
 MFDA Military Flight Data Assistant
 MFDA1 Muac Flight Data Assistant [1]
 MFDA2 Muac Flight Data Assistant [2]
 MFDA3 Muac Flight Data Assistant [3]
 MFF Mediterranean Free Flight (Project) (Projet méditerranéen de vol en mode libre)
 MFG Manpower Focus Group
 MFI MainFrame Interactive
 MFL Military Flight List
 MFPU Mobile Field Processing Unit
 MFS Mainframe Systems Team (phased-out system)
 MFS Message From Shanwick
 MFS Maastricht Fallback System
 MFT Multi Frequency Transceiver
 MFUR Most Frequently Used route / Route la plus fréquemment utilisée
 MG Military General (Queue)
 MGA Message Guidance Area
 MGC Main Graphics Controller
 MGF Manoeuvre Generation Function
 MGT Management
 MGTOW Maximum Gross Take Off Weight
 MGV Miss Generation Volume
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 Acronym Full form
 MHDD Multifunction Head Down display (Eurofighter)
 MHE Message Handling Environment
 MHF Medium High Frequency
 MHS Message Handling Service (or System)
 MHT Multi-Head Tracking
 MHT Multi-Hypothesis Technique (ARTAS)
 MHz megahertz
 MIAT Mission d'inspection administrative et technique / Administrative and Technical Inspection Committee (=ATIC)
 MIB Management Information Base
 MIC Microphone (VCS)
 MICA Met Improvements for Controller Aids
 MICA Mode S Interrogator Code Allocation
 MICAM MIlitary Code Assignment (or Allocation) Method
 MICCA Mode S Interrogator Code Conflict Alerter
 MICOG Mode S Interrogator Code Coordination Group (Groupe de coordination de l'allocation des codes
 d'interrogateur Mode S)
 MICoG Mode S IC Coordination Group
 MICUP Méthode d'Interaction Constante des Unités Programmées / Computerised unit constant interaction method.
 MID MID point (relating to RVR)
 MID Middle-East Region (ICAO) / Moyen-Orient
 MIDA Message Interchange Distributed Application
 MIDAS Man-machine Integration Design analysis System
 MIDCAS Mid-air Collision Avoidance System
 MIDE Madap Integrated Development Environment
 MIDS Multi-Function Information Distribution System
 MIF MTI Improvement Factor
 MIFG shallow FoG
 MIG Mikojan - Gurevich
 MIHF Media Independent Handover Framework
 MIL Military
 MIL Military Business Division (Division prestataire des affaires militaires)
 MIL Military Organisations
 MIL AHSG EAD Military Ad-Hoc Sub-Group on EAD matters
 MIL BD Military Business Division (EUROCONTROL)
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 Acronym Full form
 MIL FS Militärische Flugsicherung (DE)
 MIL-HDBK Military Handbook
 MIL-STD Military Standard
 MILATCC Military Air Traffic Control Centre
 MilATCC MILitary ATC Centre
 MILE Multiple Integrated Laser Engagement System
 MILEX MILitary EXercise
 MILHAG Military Harmonisation Group (Groupe d'harmonisation militaire)
 MILNET Military Network
 MILO Military Liaison Officer
 MILREP Military Representation
 MILSATCOM Military Satellite Communications
 MILT Military Team (Équipe militaire)
 MIM Marketing and Information Management (Stratégie commerciale et gestion de l'information)
 MIME Multi-Purpose Intenet Mail Extensions
 MIME Market-based Impact Mitigation for the Environment
 min minutes
 MIN MINute(s)
 MIN Message Identification Number
 MINFAP MINimum FAcilities Project
 MINIPLN Set of Flight plan related information provided by an FPPS to an ARTAS Unit, used for track labelling
 MINIT Minutes in Trail
 MINLINEUP Minimum to Line-up for Take-off
 MIO Münster Input Operator
 MIO Military sector Input Operator
 MIP Mode Interlace Pattern
 MIP Multinational Information Production
 MIP Multi-format Integration of Plots
 MIP Merge Initiation Point
 MIPS Million Instructions per Second
 MIR Management Information Repository
 MIR Management Initiation Report
 MIR Master Inspection Record
 MIRACULIX Multi Interface Radarformat Calculator and User Line Information Exchange
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 Acronym Full form
 MIRL Medium Intensity Runway Lights (USA)
 MIRTE Maastricht Interactive Route Training Environment
 MIS Manual Input Station
 MIS Management Information System
 MIT Massachusetts Institute of Technology
 MIT Miles in Trail (US)
 MITL Medium Intensity Taxiway Lights (USA)
 MITRE R&D company associated with the Massachussets Institute for Technology
 MIW Message In Window
 Mk Mark
 MK The former Yugoslav Republic of Macedonia (ISO Country Codes)
 MK12 Mark 12 Transponder
 MKPI Military Key Performance Indicator
 MKR MarKer Radio beacon
 MKS metre kilogram second
 ML Military
 ML Mean Level
 ML Maximum Likelihood
 MLAT Multilateration (multilatération)
 MLD Military Liaison Division
 MLDT Mean Logistic Down Time
 MLE Maastricht Legal Expert
 MLIT Ministry of Land, Infrastructure, Transport and Tourism (Japan)
 MLS Microwave Landing System
 MLS Manual Line Switch
 MLT Multilateration
 mm Man-Month
 MM Middle Marker
 MM Middle Marker
 MM Mobility Management
 mm millimetre
 MM Mental Model
 MMC Multimedia Computer
 MMEL Master Minimum Equipment List
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 Acronym Full form
 mmHg millimetres of mercury (unit of pressure)
 MMHS Military Message Handling System
 MMI Man-Machine Interface. See HMI
 MMIL Martin-Marietta International Link
 Mmo Maximum operating Mach
 MMO Main Meteorological Office
 MMOC Martin-Marietta Overseas Corporation
 MMPI Minnesota Multi-phasic Personality Inventory
 MMR Multi Mode Receiver
 MMR Minimum Monitoring Requirement
 MMS Maastricht Management System (système de gestion de Maastricht)
 MMS Message Multiplying System (Système de multiplication des messages)
 MMS Military Mission System
 MMS Man-Machine interface Supervision (ARTAS)
 MMS Man Machine Interface and Supervision
 MMSSR Multi-Mission Monopulse SSR
 MMU Manchester Metropolitan University
 MMUSIC Multipart MUltimedia Session Control
 MNC Major NATO Commander
 MNCC Multinational Coordination Centre
 MNCO Muac North sector position
 MNM MiNiMum
 MNPAC Muac North sector Position
 MNPC Muac North Planning Coordinator
 MNPS Minimum Navigation Performance Specification
 MNPSA Minimum Navigation Performance Specification Airspace
 MNRC1 Muac North sector position
 MNRC2 Muac North Radar Controller 2
 MNRR Muac North sector position
 MNS Mobile Network Services
 MNS Mission Need Statement
 MNT Mach Number Technique
 MNT MoNiTor(ed)(ing)
 MNTN MaiNTaiN
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 Acronym Full form
 MNWG Multi-national Working Group
 MO Management Objective (MUAC)
 MO Maintenance opérationnelle
 MOA Memorandum of Agreement
 MOB Mobile
 MoC Means of Compliance
 MOC Minimum Obstacle Clearance
 MoC Memorandum of Cooperation
 MOCBITE Maastricht Operational Computer Based Information, Training and Examination System
 MOD MODification
 MOD Ministry of Defence
 MOD Method of Operations Document
 MODAF Ministry of Defence Architecture Framework
 MODCOND ATFM Exceptional Condition Modification Message
 Mode A a secondary radar reply message giving aircraft identity
 Mode C a secondary radar reply message giving aircraft height
 MODE C Altitude Reporting Mode of Secondary Radar (ICAO)
 Mode S Mode Select
 MODE S MODE Select
 Mode S-SG Sub-Group for the initial implementation of Mode S Enhanced Surveillance
 MODE-S Mode Select
 MODEM MODulator /DEModulator
 Modem MOdulator DEModulator
 MODNL Dutch Ministry of Defence
 MODREG ATFM Regulation Modification Message
 MOF Mode of Flight
 MoF Minister of Finance
 MOFL Longitudinal Mode of Flight
 MOFR Mode S FDPS Requirements
 MOFT Transversal Mode of Flight
 MOFV Vertical Mode of Flight
 MOGAS Motor Gasoline
 MoldATSA Moldovan Air Traffic Services Authority
 MOM Message Orientated Middleware
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 EUROCONTROL AIRIAL
 Acronym Full form
 MOMO MOde s data link MOdel
 MON Centre of Expertise Monitoring
 MON Monitoring System
 MON MONitor unit (CCTV)
 MON MONday
 MONA Monitoring Aids (Outils de suivi)
 MONICA Mitigation of the Noise Impact of Civil Aviation
 MONIQUE Multiplexer Operated Network Infrastructure for high Quality Exchange
 MOOPS Menu of Output Of Plans in System
 MOP Milestone Objective Plan
 MOPS Minimum Operational Performance Specification
 MOR Mandatory Occurrence Reporting
 MOR Military Operational Requirements
 MORA minimum off-route altitude
 MORS Mandatory Occurrence Reporting Scheme
 MOS Minimum Operating Strip
 MOS Mean Opinion Score
 MOS-LQO Mean Opinion Score- Listening Quality Objective
 MOSD Mission Objectives and Strategy Document
 MOSES Mode S Operational Simulation for Enhanced Surveillance
 MOSQUITO Mode S Squitter Unit (Thales - for surface vehciles)
 MOST Maastricht Operational Statistics Tool
 MOSYS MUAC Operational SYStems (i.e. OPS systems requirements team at MUAC)
 MOT Ministry Of Transport (UK)
 MOT&E Multinational Operational Testing and Evaluation
 MOTIS Message-Oriented Text Interchange System
 MOTNE Meteorological Operational Telecommunications Network Europe
 MoU Memorandum of Understanding
 MOU MOUse pointing device
 MOUSES Mode-s Operational USe of Enhanced Surveillance
 MOUSES TF Mode S Operational Use of Enhanced Surveillance Task Force
 MOV MOVe(ment), MOVing
 MOV MOVe rlb: mkr moves picture to the desired centre position
 MOW Message Out Window
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 Acronym Full form
 MOX Maastricht Operational telephone eXchange
 MOX (-B) Maastricht Operational Telephone Exchange (version B)
 Mp Microprocessor
 MP Manpower Planning
 MP Maintenance Plan
 MP Message Priority
 MP Mental Picture
 MP Mapping
 MP-SEC Management Planning System Evaluation and Control
 MPA Military Planning Assistant
 MPA MOF Performance Analysis
 MPA Maritime Patrol aircraft
 MPC Military Planning Controller
 MPC Message Processing Centre
 MPC Military Planning Coordinator
 MPC Multimedia PC
 MPCC Multiple Protocol Communications Controller
 MPCPE Most Penalised City Pairs in Europe
 MPD Multi Purpose Display
 MPDP Masuac People Development Programme
 MPDR Medium Powered Doppler Radar
 MPDU MAC Protocol Data Unit
 MPDU Message Protocol Data Unit
 MPEG Moving Pictures Experts Group
 MPFR Multi-Purpose Flight Recorder
 MPFS Multi-Purpose File System
 MPH (Statute) Miles Per Hour
 MPL Mini Flight Plan
 MPL Multi-crew Pilot Licence
 MPLCO Map Parameter List Communication Object
 MPLS Multi-Protocol Label Switching
 MPMT Multi-Protocol Message Terminal
 MPO Maastricht Project Office
 MPO Management Project Office
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 EUROCONTROL AIRIAL
 Acronym Full form
 MPOA Multi-Protocol Over ATM
 MPP MUAC Prioritisation Plan
 MPR Swedish National Board for Measurement and Testing
 MPR Medium Powered Radar
 MPRT Menu Preview Response Time
 MPS Minimum Performance Specification
 MPs Manpower Planners
 MPS Manpower Planning Sub-Group
 MPS Mission Planning System
 MPS Metres Per Second
 MPSG Manpower Planning Sub-Group
 MPT Minimum Performance Transponder
 MPVU Multiple Plot Variable Update
 MPX Multiplex (Transmission)
 MR Mobile Router
 MRA Mandatory Route Activation/Cancellation/Modification Message
 MRA Mixed Route Airspace
 MRA Military Reserved Airspace
 MRA Minimum Reception Altitude
 MRB Maastricht Review Board
 MRBO Maastricht Review Board Operations division
 MRC Multi Radar Computer
 MRC Monitoring and Remote Control
 MRC Military Radar Controller
 MRCA Multirole Combat Aircraft
 MRCC Multiple Reference Consistency Checks
 MRD Mission Requirement Document
 MRDP Multi Radar Data Processing
 MRDPS Multi Radar Data Processing System
 MRDV Multi Radar Daten Verarbeitung / Multi-Radar Processing System
 MREA Multi Radar Environment Assessment
 MRF Mobile Routing Facility
 MRG Medium RanGe
 MRI Magnetic Resonance Imaging
 Page 272
 EUROCONTROL AIRIAL
 Acronym Full form
 MRI Master Record Index (MAS - ODS)
 MRK MaRKer
 MRK Marker (RLB)
 MRL Minimum Risk Level
 MRM Minimum Required Manoeuvre (OCD)
 MRN Message Reference Number
 MRO Maintenance Repair and Overhaul
 MRP ats / Met Reporting Point
 MRR Mandatory Rerouteing Message
 MRRP Minimum Risk Routing Point
 MRS Monitoring and Ranging Stations
 MRSA Mandatory Radar Service Area
 MRT Monitoring R/T (CPDLC)
 MRT Multi-Radar Tracking
 MRT Mean Response Time
 MRT Monitoring R/T, an ACM service message
 MRT Multi Radar Tracking
 MRT-VU Multi Radar Tracking, Variable Update
 MRTD Machine-Readable Travel Document
 MRTS Multi Radar Tracker and Server (System)
 MRTS1 Muac Reserve sector position
 MRTS2 Muac Reserve sector position
 MRU Projekt Marknadsföring Rekrytering Urval och Utbildning (SE) / Project for marketing, recruitment, selection
 and training for ATCO students, in Sweden
 MRVA Minimum Radar Vectoring Altitude
 MRWR Muac West sector position
 MS Middleware Service
 MS Microsoft
 MS MinuS
 ms millisecond
 MS Message Store
 MS Maintenance spécialisée
 MS TF Mode S System Task Force
 MS-DTS Medium Speed-Data Transmission System
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 Acronym Full form
 MSA Multi-system Assistant
 MSA Minimum Sector Altitude
 MSA Minimum Safe Altitude
 MSAP Middleware Service Access Point
 MSAS MTSAT Satellite Based Augmentation System
 MSAS MTSAT Augmentation System
 MSAT Multi-Purpose Transport Satellite
 MSAW Minimum Safe Altitude Warning (Avertisseur d'altitude minimale de sécurité)
 MSB Management Support Bureau (Former name of OoD)
 MSB Most Significant Bit
 MSBN Mobile Satellite Business Network
 MSC Message Services Component
 MSC Meteorological Services Communication
 MSC Miscellaneous Simulation Facility
 MSC Maastricht Steering Committee
 MSC Mobile Switching Centre
 MSC Multi System Coupling
 MSCC Mode S Conspicuity Code
 MSD Most Significant Digit
 MSD Modem Sharing Device (ADMAR)
 MSDU Middleware Service Data Unit
 MSEA Multi-Sensor Environment Assessment
 msec millisecond
 MSF Master Simulation Facility
 MSG Manpower Sub-Group
 MSG Message
 MSGDLP Mode S Ground Data Link Processor
 MSGF MeSsaGe Format aftn
 MSGSUM Message Summary
 MSGTXT Message Text
 MSHT Material Standardisation Harmonisation Team
 MSI IR Implementing Rule on Mode S Interrogator Code Allocation
 MSK Minimum Shift Keying
 MSL Mean Sea Level
 Page 274
 EUROCONTROL AIRIAL
 Acronym Full form
 MSN Multiple Subscriber Number
 MSNDCF Mobile Subnetwork Dependent Convergence Function
 MSNF Multi System Networking Facility
 MSO Message Start Opportunity
 MSP Multi-sector planning
 MSP Mode-s Specific Protocol
 MSPC Muac South Planning Coordinator
 MSPO Maastricht Simulator Planning Office
 MSPSCO Madap Specific Plan Server Communication Object
 MSPSR Multi Static Primary Surveillance Radar
 MSR message success rate
 MSRT Mean Services Restoration Time
 MSS Message Switching System
 MSS Mobile Satellite Services
 MSS Mass Storage System
 MSS Mode S Specific Service
 MSS Message Storage System
 MSS Maintenance and Support Services
 MSSA Message Switching System
 MSSE Mode S Specific Service Entity
 MSSP Managed Security Services Provider
 MSSP Mode S Specific (Service) Protocol
 MSSR Monopulse Secondary Surveillance Radar
 MSSS Mode S Specific Service
 MST Multiple Sensor Tracking
 MSTA Mode S Trials and Applications
 MSTU Multiple Stagger Trigger Unit
 MSU Management Storage Unit
 MSUP Military SUPervisor
 MSVG Member States' Voluntary Group
 MSX MicroSoft eXtended (Basic)
 MT Magnetic Track
 MT Message Type
 MT Malta (ISO 2 characters country Code)
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 EUROCONTROL AIRIAL
 Acronym Full form
 MT Message Transfer
 MT Mosaic Table
 MT MounTain
 MT-Service Message Transfer Service
 MTA Message Transfer Area
 MTA Military Training Area
 MTA Message Transfer Agent
 MTAC Multiple Time Around Clutter
 MTAE Message Transfer Agent Entity
 MTAT Multiple Time Around Targets
 MTBCF Mean Time Between Critical Failures
 MTBF Mean Time Between Failure(s)
 MTBR Mean Time Between Removals
 MTCA Medium-Term Conflict Alert
 MTCD Medium-Term Conflict Detection (détection des conflits à moyen terme)
 MTCDR Medium-Term Conflict Detection and Resolution
 MTCEP (Short) & Medium Term Capacity Enhancement Plan
 MTCU Message Transfer and Control Unit
 MTD Moving Target Detection
 MTD Micro Tabular Display (SDD)
 MTD Mean Down Time
 MTD Moving Target Detector
 MTD Medium Time to Detect
 MTDP Maastricht Technical Development Plan
 MTEM Ministère des transports, de l'équipement et de la mer
 MTF Modulation Transfer Function
 MTF Medium-term forecast
 MTFA MTF Area
 MTFI MTF Integration
 MTI Moving Target Indication
 MTI Moving Target Indicator
 MTL Message Transfer Layer
 MTMA Major TMA
 MTN Mega Transport Network
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 EUROCONTROL AIRIAL
 Acronym Full form
 MTOM Maximum Take-Off Mass
 MTOT Managed take-off Time
 MTOW Maximum Take-Off Weight
 MTP Medium-Term Plan
 MTP Message Transfer Protocol
 MTPA Mobile (SSR) Transponder Performance Analyser
 MTR Mid-Term Review
 Mtraq Multi track quality (RADNET)
 MTS Memory Time Switch (ACS)
 MTS upper winds & Temperature data (printout)
 MTS MeTeorological Store
 MTS Message Transfer System
 MTS Manoeuvrable Target Simulator
 MTSAT Multifunction Transport Satellite
 MTSO Mobile Telephone Switching Office
 MTTF Mean Time To Failure
 MTTR Mean Time To Repair/Restore/Recover (CBN - CNG)
 MTTRlru Mean Time to repair LRU
 MTTRp Mean Time to repair product
 MTTRsru Mean Time to repair SRU
 MTTT Minimum Turn-round Time
 MTU Maximum Transfer Unit
 MTU Master Trigger Unit
 MTU Magnetic Tape Unit
 MTU MeTric Units
 MTV Mid-Term concept validation programme
 MTW MounTain Waves
 MTWA Maximum Take-off Weight Authorised
 MTWA Maximum Total Weight Authorised
 MTX MaTriX
 MU Management Unit (ACARS)
 Mu (Greek letter, lower case) Symbol for micro (10-6)
 MUAC Maastricht Upper Area Control Centre (Centre de contrôle de l'espace aérien supérieur de Maastricht)
 MUACC Maastricht Upper Area Control Centre (Centre de contrôle de l'espace aérien supérieur de Maastricht)
 Page 277
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 Acronym Full form
 MUDPIE Multiple User Data Processing Interactive Environment
 MUF Maximum Usable Frequency
 MUFTIS Model Use of Fast-Time Simulation
 MUM Matcc Update Message
 MUR Maximum Unambiguous Range
 MURATREC Multi-Radar Trajectory Reconstitution
 MUSAC Multiple Switching and Confirming (VCS)
 MUSE Maastricht Upgraded Simulation Environment
 MUT Mean Up Time
 MUX Multiplex
 MUX MUltipleXer
 MV Monitoring Value
 MV Military View
 MV Motor Vessel
 MVACO Madap Value Added Communication Object
 MVE Move (RLB)
 MVID Major Vector IDentifier
 MVPA Military Variable Profile Area
 MVPA Mobile Virtual Path network Architecture
 MVS Multiple Virtual Storage
 MVS Monitor Vertical Speed
 MVT Movement Message
 mW milliwatt
 MW megawatt
 MW Microwave link
 mw Man Week
 MWA Message Warning Area
 MWCO Muac West sector position
 MWO Meteorological Watch Office
 MWP Meteorological Working Position
 MWPAC Muac West sector position
 MWPC Muac West Planning Coordinator (EWP 11,
 MWRC1 Muac West sector position 1
 MWRC2 Muac West sector position 2
 Page 278
 EUROCONTROL AIRIAL
 Acronym Full form
 MWT(A) Mean Waiting Time, Administrative
 MWTP Mean Willingness to Pay
 MWW (Incoming) Upper Wind and temperature forecast
 MX MiXed type of ice formation (white & clear)
 MXCOP MADAP Exit Coordination Point
 n Symbol for nano- (10-9)
 N Neper
 N Non-scheduled flight type
 N Next sector (N-FDPS)
 N North, Northern latitude
 n-CONECT Network-Common Enhanced Collaborative ATM
 N-Data Network Data Service
 N-FDPS Next-Generation Flight Data Processing System
 N-FDPS New Flight Data Processing System
 N-FRG Northern Federal Republic of Germany
 N-HRA NSA Human Resources Application
 N-ODS New Operator Input and Display System (N-FDPS)
 N/A Not Available or Not Assigned
 N/A Not Applicable
 N/App Not Applicable
 N/C Not Comparable
 N5 Number 5
 NA National Administration
 NA Navigation aérienne
 NA Navaid or Navigation Aid
 NA non-Active
 NAA National Aviation Authority
 NAA National Airworthiness Authorities (autorités nationales de navigabilité (ANN))
 NABS National Augmentation Broadcast System
 NAC Navigation Accuracy Category
 NAC NextGen Advisory Committee
 NAC North Atlantic Council
 NACA National Advisory Committee for Aeronautics
 NACMA NATO Agency for Air Command and Control System Management
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 EUROCONTROL AIRIAL
 Acronym Full form
 NACp Navigation Accuracy Category for Position
 NAD Network Added Delay
 NADC NATO Air Defence Committee
 NADGE NATO Air Defence Ground Environment
 NADIN National Airspace Data Interchange Network (US)
 NADPS Noise Abatement Departure Procedures
 NAEW NAto Early Warning
 NAEW & C NATO Airborne Early Warnings (and Control)
 NAF NATO Architecture Framework
 NAF New Arrival Form (Web form)
 NAFTA North American Free Trade Agreement (Canada, US, Mexico)
 NAGU Notice Advisory to GLONASS Users
 NAI Non-Automated (or Non-Automatic) Initiation
 NAIA New Athens International Airport
 NAIS Norwegian Aeronautical Information System
 NAK Negative Acknowledgement (ICAO)
 NAK Negative AcKnowledge
 NALLA National Long Lines Agency
 NAM North America Region (ICAO)
 NAM Non AMC-Manageable Area
 NAMC National Airspace Management Cell
 NAMD New Arrival, Move and Departure process
 NAME Nadge - ADMAR Message Exchange
 NAMILCOM NATO Military Committee
 NAMSA NATO Maintenance and Supply Agency
 NAMSO NATO Maintenance and Supply Organisation
 NAN Next Authority Notified message (OLDI)
 NANET National Networks
 NANSC National Air Navigation Services Company (Egypt)
 NANU Notice Advisory to NAVSTAR Users
 NAP National Associated Programmes
 NAP Noise Abatement Operating Procedure
 NAPS National Air Pollution Surveillance Network
 NAR North American Route System
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 Acronym Full form
 NARDS Norwegian Automatic Dependent Surveillance
 NARFA National Radio Frequencies Agency
 NARG Navigation Aids and Area Navigation Group (ICAO - EANPG)
 NARSIM NLR ATC Research Simulator
 NAS Network Administration System (DAKOS, FFM / RAPNET - MAS UAC)
 NAS Network Attached Storage
 NAS National Airspace System (US)
 NAS National Airspace
 NAS Naval Air Station
 NAS-Plan National Airspace Plan
 NASA US National Aeronautics & Space Administration (Administration nationale de l'aéronautique et de l'espace )
 NASA RTLX NASA Raw Task Load indeX
 NASA TLX NASA Task Load indeX
 NASC National AIS System Centre
 NASDA National Space Development Agency of Japan
 NASG Navigation Applications Sub-Group (Sous-groupe "Applications de navigation")
 NASPAC National Airspace Performance Analysis Capability
 NASUG North American SIMMOD User Group
 NAT Network Address Translation
 NAT North Atlantic Region (ICAO)
 NAT North Atlantic Track
 NAT ADS North Atlantic Automatic Dependent Surveillance
 NAT ATMG North Atlantic Air Traffic Management
 NAT CADAG North Atlantic Communications Automation and Data Link Applications Group
 NAT CMA North Atlantic Region Central Monitoring Agency
 NAT IMG North Atlantic Implementation Management Group
 NAT MWG North Atlantic Mathematicians Working Group
 NAT NAM North Atlantic / North America (ICAO Regions)
 NAT OPS MNG North Atlantic Operations Managers Meeting
 NAT PCO North Atlantic Programme Coordination Office (ICAO)
 NAT RSSIG North Atlantic Reduced Separation Standard Implementation Group
 NAT SPG North Atlantic Systems Planning Group
 NAT VSIG North Atlantic Vertical Separation and Implementation Group
 NAT-PT Network Address Translation - Protocol Translation
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 Acronym Full form
 NAT-TFG North Atlantic Air Traffic Forecasting Group
 NATA National Air Traffic Agency, Albania
 NATCON North Atlantic Concept
 NATINAD(S) NATO Europe Integrated Air Defence (System)
 NATMAC National Air Traffic Management & Advisory Committee
 NATMC National Airspace and Traffic Management Centre (Germany)
 NATMC NATO Air Traffic Management Committee (Comité OTAN de gestion de la circulation aérienne)
 NATMIG North European ATM Industry Group
 NATN (Swedish) National Aeronautical telecommunications Network
 NATO North Atlantic Treaty Organization
 NATPG North Atlantic Planning Group
 NATS National Air Traffic Services (UK)
 NATSPG North Atlantic Systems Planning Group (ICAO)
 NAV Net Asset Value
 NAV Navigation (EUROCONTROL EATMP Domain name)
 NAV Navigational equipment (Flight plan item 18 indicator)
 NAV NAVigation(al)
 NAV Net Asset Value
 NAV Net Asset Value
 NAV-1 Radar Data System (Portugal)
 NAVAID Navigation Aid
 NAVAID Air navigation aid (Aide à la navigation aérienne)
 NAVCEN Navigation Center
 NAVDATA Navigation Data
 NAVDB Navigation Data Base
 NAVIAIR Flyvesikrinstjenesten (Danish Air Navigation Service Provider)
 NAVSAT Navigation Satellite
 NAVSEP Navigation and Separation Specialist Panel
 NAVSTAR Navigation Satellite Timing and Ranging System (Original name of military GPS)
 NAWS NILU Ash Warning Service
 NB NorthBound
 NBA Finnish CAA (SU)
 NBAA National Business Aviation Association
 nbarc Number of aircraft (ADEXP)
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 EUROCONTROL AIRIAL
 Acronym Full form
 NBFR Not BeFoRe ...
 NBS National Bureau of Standards (U.S.A.)
 NBV Net Book Value
 NC Normally Connected
 NC non-Compliant
 NC Number of C-segment (bits)
 NC Navigation Computer (Eurofighter)
 NC Non-Conformance
 NC No Change
 NC Number of C-Segment
 NC Non-Critical
 NC Normally Closed
 NCAA NATO Civil Aviation Agency - Agence OTAN de l'aviation civile
 NCAA Norwegian Civil Aviation Authority
 NCAB National Civil Aviation Board
 NCAIC National Civil Aviation Information Centre
 NCAT Net-Centric Air Transportation
 NCC Non-Commercial operations with Complex motor-powered aircraft
 NCCA No Clearance to Civil Aircraft
 NCCF Network Communications Control Facility
 NCD Network Capacity and Demand
 NCD Network adapter CarD
 NCIPD National CIP Documents (now replaced by LSSIP (documents))
 NCMS Network Channel Management Station
 NCMS Network Channel Management System
 NCN non-Compliance Notification
 NCO Non-Commercial operations with Other-than-complex motor-powered aircraft
 NCOP Entry Coordination Point
 NCP NSA Cooperation Platform
 NCP Entry Coordination Partner (N-FDPS)
 NCP Network Control Programme
 NCP Network Control Protocol
 NCP National Supervisory Authorities Coordination Platform
 NCQ Network, Communication, Quality Unit (Unité "Réseau, communication et qualité")
 Page 283
 EUROCONTROL AIRIAL
 Acronym Full form
 NCR non-Conformity Report
 NCS Navigational Computer System
 NCS Network Control System / Station (CBN - CNG)
 NCS Network Communication System
 NCW non-Conformance Warning
 ND Network Digit (CCITT X.121 Structure)
 ND Navigation Display
 ND Number of Dte addresses
 ND Number of D-Segment
 NDA Next Data Authority (ICAO)
 NDA National Distribution Agency
 NDA Network Delay Attribution
 NDA non-Disclosure Agreement (accord de non-divulgation)
 NDB Non-Directional Beacon
 NDB-A Nondirectional Beacon Circling Approach
 NDBX open navigation data base standard
 NDE Node Processor
 NDEF No Details Estimate Form
 NDI non-Development Items
 NDOP Network Directors of Operations
 NDOP/NDTECH Network directors of operations & technology
 NDS Non-Deviation Status
 NDS Nuclear Detection System
 NDT Natural Departure Time
 NE North-East
 NE Network Element
 NEA Nederlands Instituut voor Economische Argumentatie (NL)
 NEAC North European ANS Providers' Cooperation
 NEAN North European ADS-B Network
 NEAP North European ANS Providers
 NEAP North European CNS/ATM Application Project
 NEASCOG NATO-EUROCONTROL Air Traffic Management (ATM) Security Group (groupe de coordination OTANEUROCONTROL
 pour la sûreté de la navigation aérienne)
 NEB North-EastBound
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 Acronym Full form
 NEC National Environment Coordinator
 NECP Entry Coordination Point (MADAP)
 NECS Next Generation End User Computing Services Project
 NEF Noise Exposure Forecast
 NEFAB North European Functional Airspace Block
 NEFRA North European Free Route Airspace Programme
 NEG NEGative, No, incorrect, permission refused
 NEGATIVE RA RA applying maximum vertical rate (eg don't descend > 500 ft/min)
 NEI Noise Exposure Index
 NELS Northwest European Loran-C System
 NEMO Network Mobility
 NEO Network Enabled Operations
 NEON NEw Organisation Natenheim
 NEP (A)NSP Expert Panel
 NERC New En-Route Control Centre (UK)
 NERC System New En-Route Centre System (UK)
 NERS North Atlantic European Routing System
 NES Navigation Ground Earth Station
 NESN Next Expected Sequence Number
 NEST Network Strategic Monitoring Tool
 Net Network
 NET Network Entity Title
 NET BD Network Capacity Business Division (EUROCONTROL - DAP Business Directorate)
 NET-TF Network Management Task Force
 NetBIOS-DGM NetBIOS Datagram Service
 NetBIOS-NS NetBIOS Name Service
 NetBIOS-SSN NetBIOS Session Service
 NETCAP Network Capacity (simulator)
 NETMA NATO Eurofighter and Tornado Management Agency
 NETO Entry ETO (N-FDPS)
 NEVAC Network Estimation Visualisation ACC Capacity
 NEWCTOT New Calculated Take-Off Time
 NEWEOBD New Estimated Take-off Date
 NEWEOBT New Estimated Off-Block Time
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 Acronym Full form
 NEWETOT New Estimated Take-Off Time
 NewPENS New Pan-European Network Service
 NEWPTOT New Provisional Take-off Time
 NEWREG New ATFM Regulation Message
 NEWRTE New Route
 NEXCOM Next Generation Air/Ground Communications
 NEXRAD Next Generation (Weather) Radar - US WR Programme
 NexSAT Next Generation Satellite Systems
 NF Noise Figure
 NF IR Network Functions Implementing Regulation (règlement d¿exécution relatif aux fonctions de réseau)
 NFL Entry Flight Level (N-FDPS)
 NFL Nachrichten für Luftfahrer (DE) (= NOTAM)
 NFL eNtry Flight Level (Re-entrant flight)
 NFLGB Nachrichten für Luftfahrt Gerichte Beratung (DE) (AIS)
 NFPPDS National Flight Plan Processing System
 NFR Non-Functional Requirement
 NFS Network Filing System
 NFS Native File Store
 NFT Nominal Flight Trajectory
 NFT Never Filtered Tracks
 NGA National Geospatial-Intelligence Agency
 NGA Non-Governmental Authorities
 NGAP Next Generation Aviation Professionals
 NGATS Next Generation Air Transport System
 NGATS => NextGen Next Generation Air Transportation System (Système de transport aérien de la prochaine génération)
 NGS National Geodetic Survey
 NGSS Next Generation Satellite System
 NGT NiGhT
 NH Network Header
 NHIP Nordic Harmonisation and Integration Programme
 NHRP Next Hop Resolution Protocol
 NHS non-Standard Headset
 NI Not-Involved sector (N-FDPS)
 NI Navigation Infrastructure
 Page 286
 EUROCONTROL AIRIAL
 Acronym Full form
 NIC Network Interface Cards
 NIC Network Information Centre
 NIC Navigation Integrity Category
 NIFO Next-In, First-Out
 NIH Noise Induced Hearing Loss
 NIK Nicky VOR
 NIL None, Nothing to communicate
 NILU Norsk institutt for luftforskning (Norwegian Institute for Air Research)
 NIM Network Information Message
 NIM Navigational Integrity Monitoring (ICAO)
 NIMA National Imagery and Mapping Agency (of the US Department of Defence (DOD)
 NIMS Network Information Management System / Système de gestion des informations à léchelle du réseau
 NINS-NILS New Integrated Navigation System - New Integrated Landing System
 NINST non-INSTrument runway type
 NIPS Network Infrastructure Performance monitoring and analysis Service
 NIPS/SAT-NAV NIPS/monitoring and prediction of satellite navigation
 NIROS Noise Impact Reduction and Optimization System
 NIS Network Information Services (now replaced by Operational Collaboration or Operational Applications)
 NIS Network Infrastructure and Security
 NISG Navigation Infrastructure Sub-Group (Sous-groupe "Infrastructure de navigation")
 NIST National Institute of Standards and Technology (U.S.A.)
 NIT 1 cd/mý (luminance)
 NIT Nordic Implementation Team
 NITA New Information Technologies in Aviation
 NITS Nature of the emergency, (crew's) Intentions, Time frame, Special instructions
 NKZ Netzkontrollzentrale
 NL Network Layer
 NL The Netherlands
 NLA Next Level Aggregation
 NLA New Large Aircraft
 NLC Netherlands Aviation College (NL) / Nederlands Luchtvaart College
 NLES Navigation Land Earth Station
 NLG Nose Landing Gear
 NLM Netware Loadable Module
 Page 287
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 Acronym Full form
 NLM Nederlandse Luchtvaart Maatschappij (NL)
 NLQ Near Letter Quality
 NLR Nationaal Lucht- en Ruimtevaartlaboratorium (National aerospace laboratory (Netherlands)) (Laboratoire
 aérospatial des Pays-Bas)
 NLRI Network Layer Reachability Information
 NLS Navigation & Landing System
 NLSP Network Layer Security Protocol
 NLST New List (for RPLs)
 NLT Not Later Than
 NM Network Manager (NB - "NM" should not be used for "Network Management") (gestionnaire du réseau)
 Nm Newton Metre
 NM Negotiation Manager (PATs)
 NM Nautical Mile (1,852 m)
 NM North Marker
 NM 4ACC Network Manager 4 Area Control Centres
 NM PTF Network Operations Performance Task Force (NB: Now replaced by NOP TF)
 NM WAN Network Manager Wide Area Network
 NMAC Near Mid-Air Collision
 NMB Network Management Board
 NMC Network Management Centre (RAPNET / MAS UAC / DAKOS)
 NMC Network Management Cell (Cellule de gestion du réseau)
 NMD Network Management Directorate (direction "Gestion du réseau")
 NMD/ACD Network Management Directorate/Airspace and Capacity Division (direction "Gestion du réseau"/division
 "Espace aérien et capacité" - DNM/ACD)
 NMD/BCS Network Management Directorate/Business Coordination Service (direction "Gestion du réseau"/service
 "Coordination des activités" - DNM/BCS)
 NMD/INF Network Management Directorate/Infrastructure Division (direction "Gestion du réseau"/division
 "Infrastructure" - DNM/INF)
 NMD/NOM Network Management Directorate/Operations Division (direction "Gestion du réseau"/division "Opérations" -
 DNM/NOM)
 NMD/OFF Network Management Directorate/Director and the Office of the Director (direction "Gestion du
 réseau"/directeur DNM et le bureau du directeur DNM - DNM/OFF)
 NMD/SAF Network Management Directorate/Operational Safety, SQS and Integrated Risk Management Unit (direction
 "Gestion du réseau"/unité "Sécurité opérationnelle, SQS et gestion coordonnée des risques" - DNM/SAF)
 NMD/TA Network Management Directorate/Technology Advisor (conseiller en technologie - DNM/TA)
 NMD/TEC Network Management Directorate/Technology Division (direction "Gestion du réseau"/division "Technologie" -
 DNM/TEC)
 Page 288
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 Acronym Full form
 NMD/TRG Network Management Directorate/Training Division (direction "Gestion du réseau"/division "Formation" -
 DNM/TRG)
 NME/ad hoc d Hoc Working Group of National Management Experts
 NMEA National Marine Electronics Association
 NMF Network Management Function
 NMF IR Network Management Functions Implementing Rule
 NMICP Network Manager Incident Coordination Procedure
 NMIL Nieuw Milligen
 NMIR Network Manager Interactive Reporting
 NML NorMaL
 NMOC Network Manager Operations Centre (centre d'exploitation du gestionnaire du réseau)
 NMOCRD NM Operational Contingency Requirements Document
 NMOS N-type Metal Oxide Semiconductor
 NMP Network Monitoring Protocol
 NMPP Network Manager Performance Plan
 NMR Nuclear Magnetic Resonance
 NMR National Military Representative
 NMS Network Management System
 NMT Network ManagemenT
 NMVP Network Manager Validation Platform
 NNCOP New Node Change-Over Protocol
 NNE North North-East
 NNEW NextGen Network Enabled Weather
 NNI Network-to-Network Interface
 NNSS Navy Navigation Satellite System (Known as TRANSIT)
 NNW North-North-West
 NO Norway (ISO Country Code)
 NO Normally Open
 NO Network Operator
 NOAA National Oceanic and Atmospheric Administration (US)
 NOAAPORT National Oceanic and Atmospheric Administration Data Transmission System (US)
 NOC Network Operation Centre
 NODE NATS Operational Display Equipment
 NOF NOTAM Office
 Page 289
 EUROCONTROL AIRIAL
 Acronym Full form
 NOG Northern Telecom Network Operator's Group (CNG - CBN)
 NOG OA&M NOG Operations, Administration & Maintenance Subgroup (CNG - CBN)
 NOG-FSG NOG Features Subgroup (CNG - CBN)
 NOIRh Nouvel outil informatique des ressources humaines
 NOKIA Nokia Corporation
 NOMAS NOTAM Management System (NL)
 NOMSG Number Of MeSsaGes
 NOP Network Operations Plan (plan d'exploitation du réseau)
 NOP non-OPerational (device status)
 NOP Network Operations Portal
 NOP TF Network Operations Performance Task Force
 NOPAL Network Operations Plan Access Layer
 NOPIA Nouvel outil de production de l'information aéronautique
 NOPLA Network Operations Planner
 NOPT No Procedure Turn required
 NORAC No Radio Contact
 NORACON Northern European and Austro Control Consortium
 NORAD NORth american Air Defence command
 NORAP Norwegian Radar Programme
 NOS Network Operating System
 NOSIG NO SIGnificant change (trend type landing forecasts)
 NOSS Normal Operations Safety Survey
 NOT Notam
 NOT No Transfer
 NOT Boolean Symbol - NOT
 NOTA Northern Oceanic Transition Area
 NOTAM Notice to Airmen
 NOTAMC NOTAM to cancel
 NOTAMN New NOTAM
 NOTAMR NOTAM to replace
 NOTOC Notification to Captain (notification au commandant)
 NOV NOVember
 NOVOSTI Russian News and Information Agency
 NOW Network Operations World (DNM vlog)
 Page 290
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 Acronym Full form
 NOx Nitrogen oxides
 NOZ Normal Operating Zone
 NP Network Protocol
 NP-Complete Nondeterministic Polynomial - Complete
 NPA Notice of Proposed Amendments (Avis de proposition de modification) (EASA)
 NPA Non-Precision Approach (Approche classique)
 NPDU Network Protocol Data Unit (RMCDE)
 NPI Null Pointer Indication
 NPIAS National Plan of Integrated Airport Systems (US)
 NPL Night Plan
 NPM Node and Process Management
 NPM Network Performance Monitor
 NPO Scientific and Development Association [Russian]
 NPO KIP [Russian]. Scientific Production Organisation ; Scientific Production Institute of Space Device Building
 NPO PM [Russian]. NPO Prikladnoi Mekhaniki (RU) / Scientific Production Institute for Applied Mechanics
 NPP Network Performance Plan
 NPR Noise Preferential Routes
 NPRM Notice of Proposed Rulemaking (Avis de proposition de réglementation)
 NPSI Network Packet Switching Interface
 NPV Net Present Value
 NPV Non-Precision Approach procedure with Vertical Guidance
 NPWP non-Published Way Point
 NPZ No Planning Zone
 NR NumbeR
 NR Normal Response
 NR Noise Rating
 NR Non-Reserved Bandwidth
 Nr. Number
 NRA Non-Radar Airspace
 NRAC NumbeR of AirCraft
 NRC National RAD Coordinator
 NRC National Research Council
 NRF NATS Research Facility
 NRH No Reply Heard
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 EUROCONTROL AIRIAL
 Acronym Full form
 NRL US) Naval Research Laboratory
 NRM Normal Response Mode
 NRP North American Route Program
 NRP Next Reporting Point
 NRP National Route Program
 NRP North Reference Pulse
 NRPO New Roster Project Office (MUAC)
 NRT-VBR non-Real Time - Variable Bit Rate
 NRZ non-Return to Zero (RMCDE)
 NRZI non-Return to Zero Inverted (RMCDE)
 ns Nanosecond
 NS Next Sector
 NS Navigation Specifications
 Ns Nimbo Stratus
 NS Network CNS-IM Services
 NS Navigation Separation
 NSA National Supervisory Authority (Autorité de surveillance nationale)
 NSA non-Sequenced Acknowledgement
 NSA - SOCA NSA Training Intiative: Oversight of Competence Arrangements for ATM staff
 NSA - SOSM NSA Training Initiative: Oversight of Safety Management Arrangements in ATM
 NSA -SOSW NSA Training Initiative: Oversight of Software used in ATM
 NSA SOCH NSA Training Initiative: Oversight of Changes in ATM
 NSAA North Sea Area Amsterdam
 NSAC National Supervisory Authorities Committee
 NSAP Network Service Access Point
 NSAP Network Service Access Point
 NSC New Scottish Centre
 NSC Notice to Airmen Selection Criteria
 NSC Nil Significant Cloud
 NSD Navigational Status Display
 NSDI Noise Sensitivity Depreciation Index
 NSDMCG NextGen-SESAR Data Model Coordination Group
 NSDU Network Service Data Unit
 NSE Navigation System Error
 Page 292
 EUROCONTROL AIRIAL
 Acronym Full form
 NSFL Supplementary Entry Flight Level (N-FDPS)
 NSFNET us wide internet backbone
 NSI non-Sequenced Information
 NSM Network Station Management
 NSM-TF Network and System Management Task Force
 NSP Network Strategic Plan
 NSP Navigation Systems Panel (ICAO)
 NSS Network Server System
 NSSG Navigation and Separation Sub-Group
 NSSR Next/New Secondary Surveillance Radar Code (MADAP)
 NST Northern Standard Time, UTC -3h30. (USA)
 NSTB National Safety Transport Board
 NSTB National Satellite Test Bed
 NSVN NATO Secure Voice Network
 NSWC Naval Surface Warfare Centre
 NT Northern Telecom (RMCDE)
 NT Microsoft Windows NT Operating System
 NT Network Termination
 NT1 Network Termination type [1]
 NT2 Network Termination type [2]
 NTA No Traffic Accepted Message
 NTACNL No Traffic Accepted Cancellation Message
 NTAMOD No Traffic Accepted Modification Message
 NTC Negative Temperature Coefficient
 NTCR Near-Term Conflict Resolution Tool
 NTE Not to exceed
 NTI NSA Training Initiative
 NTM F/T SIM Nattenheim Fast Time Simulation
 NTN Network Terminal Number (CCITT X.121 Structure)
 NTP Network Time Protocol
 NTP Network Termination Point
 NTPI New Travel Policy Implementation
 NTPI New Travel Policy Implementation (Mise en oeuvre de la nouvelle politique en matière de missions)
 NTPS New Travel Policy System
 Page 293
 EUROCONTROL AIRIAL
 Acronym Full form
 NTR New Task Request
 NTR/ADD New Task Request/ADD
 NTR/SRD New Task Request/SRD
 NTR/TL.ADD New Task Request/Top Level ADD and ICD
 NTRC National TMA RNAV Coordinator
 NTRY Entry
 NTS Network Technical Systems (NM)
 NTSB National Transportation Safety Board (US)
 NTT NERC Transition Team
 NTW NeTWork
 NTWG New Technologies Working Group (ICAO)
 NTZ No Transgression Zone
 NUA Network User Address
 NUAC Nordic Upper Area Control Centre
 NUC Navigation Uncertainty Category
 NUDET Nuclear Detection
 NUL blank
 NUP North European ADS-B Network (NEAN) Update Programme
 NVA Navigational Aid (ENV entity item, used in all CHMI)
 NVCS New Voice Communication System
 NVG Night Vision Goggles
 NVIS Night Vision Imaging System
 NVM Non-Volatile Memory (flight data recorder)
 NVM Non-Volatile memory
 NvPM Non-volatile Particulate Matter
 NVRAM non-Volatile RAM
 NW North-West
 NWB North-WestBound
 NWS National Weather Service (US)
 NWSTG National Weather Service Telecommunications Gateway (US)
 NXRPT Next Reporting Point
 NXT Next
 NXT Exceeding Time to Perform Next Clearance
 NXT [7] NeXT: display of the next edd page/queue
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 Acronym Full form
 NXT [8] NeXT: display of the next tid page/queue
 NY New York
 NZ New Zealand
 O Oceanic
 O-TGS ODS - Target Generation System
 O/R Originator/Recipient
 O/R On Request
 O/R-Addres Originator-Recipient Address
 OA Office Automation
 OAA Open Aviation Area
 OAC Olno Assistant Controller
 OACA Civil Aviation and Airports Authority (Office de l'aviation civile et des aéroports)
 OACC Oceanic Area Control Centre
 OACI Organisation de l'aviation civile internationale (International Civil Aviation Organization - ICAO)
 OAG Official Airlines Guide
 OAM Operations and Maintenance
 OAPC Office Automation and Personal Computer
 OAS Oceanic Automation System (ICAO - ADS)
 OAS Office Automation System
 OASIS Open ATC System Integration Strategy (OCD)
 OASIS Operational and Supportability Implementation System (US)
 OASIS Oceanic Area System Improvement Study
 OASIS Operational Application of Special Intelligence Systems
 OASIS Open Architecture for Simulation Systems (Architecture ouverte pour systèmes de simulation)
 OAST Office Automation Support Team
 OASYS Operational Airspace & SYStem section
 OASYS Obstacle Avoidance System
 OAT Operational Air Traffic (Circulation opérationnelle militaire)
 OAT Outside Air Temperature (= QMU)
 OATA Overall ATM/CNS Target Architecture (Architecture globale ATM/CNS cible)
 OATPwCO OAT PreWarning Communication Object
 OATTS Operational Air Traffic Transit Service - système de transit COM-IFR
 OAUG Office Automation Users Group
 OBA Off-Bore sight Angle
 Page 295
 EUROCONTROL AIRIAL
 Acronym Full form
 OBC On-Board Computer
 OBC Operations Backup Centre
 Obj. Objective in CIP
 OBLK Oat BLocKed ssr codes
 OBM Madap data OBsolete
 OBR Obnova Radiolomunikaci (YU) / Renewal of Air-Ground Communications
 OBS OBSserve(d), OBServation
 OBS OBservation Status
 OBS time at which record is cancelled, (declared OBSolete)
 OBS Organisational Breakdown Structure
 OBSC OBSCure(d), OBSCuring
 OBST OBSTacle
 OBT Off-Block Time
 OC Object Correlator
 OC Other Centre
 OC Optical Carrier
 OCA Overall Concept and Architecture Activity
 OCA Online Communication Affairs
 OCA Oceanic Control Area
 OCA Obstacle Clearance Altitude
 OCA/H Obstacle Clearance Altitude/Height
 OCAP Out of Control Action Plan
 Occ OCCulting, (relating to marine lights)
 OCC Operations Control Centre
 OCC Olno Coordinating Controller
 OCCAR Organisation Conjointe de Coopération en matière d'Armament
 OCCB Operational Change Control Board
 OCD Oceanic Clearance Delivery
 OCD Operational Concept Document (Concept opérationnel)
 OCDE Organisation de Coopération et de Développement économiques = OECD
 OCE Operational Concept Element
 OCG Operations Coordination Group (Groupe de coordination des opérations)
 OCGCTA Organisme Central de Gestion des Courants de Trafic Aérien
 OCH Obstacle Clearance Height
 Page 296
 EUROCONTROL AIRIAL
 Acronym Full form
 OCIC Operations Control Incident Centre
 OCL Obstacle Clearance Limit (ICAO)
 OCL Operation Control Language
 OCL Oceanic Clearance
 OCL Object Constraint Language
 OCL Oceanic CLearance delivery
 OCM Oceanic Clearance Message
 OCM Operational Configuration Management (N-FDPS)
 OCNL OCcasioNaL(ly)
 OCP Operator Control Panel
 OCP Obstacle Clearance Panel
 OCP Operational Change Proposal
 OCP Operational Computer Programme
 OCR Optical Character Recognition
 OCR Operational and Certification Requirements
 OCR TF Operational and Certification Requirements Task Force
 OCS Obstacle Clearance Surface
 OCS Operational Control System
 OCS Operational Control Segment
 OCT Operational Control Terminal (VCS)
 OCT OCTober
 OCT Onward Clearance Time
 OCT Operating Control Terminal
 OCTF Operation Concept Task Force
 OCTOPUS Off-line Concentrator based TOken ring Protocol User Support
 OCTS Ods Contract Technical Specification
 OCU Operational Conversion Unit
 OCV Operational Coverage Volume
 OCVM Operational Concept Validation Methodology
 OCVSD Operational Concept Validation Strategy Document
 OCW Operational Configuration Window
 OCX New Object similar to VBX
 OD Organisation and Development
 OD Optional Data
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 EUROCONTROL AIRIAL
 Acronym Full form
 ODA Open Document Architecture
 ODALS Omnidirectional Approach Lighting System
 ODAPS Oceanic Display And Planning System
 ODBC Open Data Base Connectivity
 ODBMS Object Database Management System
 ODC Organisational Development Committee
 ODC Organisational Development Committee
 ODC Office of Defence Cooperation
 ODCS Obstacle Data Collection Surface
 ODETE On-line Data Exchange Terminal
 ODF Oceanic Development Facility (ICAO)
 ODI Open Data-link Interface
 ODIAC Operational Development of Integrated Surveillance and Air/Ground Data Communications
 ODIAC-SG Operational Development of Initial Air ground Data Communications Subgroup
 ODIAC-TF Operational Development of Initial Air/Ground Data Communications Services
 ODID Operational Display and Input Device (Dispositif d'affichage et d'entrée de données)
 ODID Operational Display and Input Development
 ODIF Open Document Interchange Format
 ODIN (Swedish) Briefing System (AIS)
 ODL Opposite Direction flight Level
 ODL Optional Data Length
 ODP ATM Operational Requirements & Data Processing
 ODP Open Distributed Processing
 ODP operational deployment package
 ODP Optimised Descent Profile
 ODS Operator Input and Display System (système d'entrée et d'affichage de données)
 ODS Operational Display System (ESCO)
 ODSG Operations and Development Sub-Group (Sous-groupe "Opérations et développement")
 ODSGADC ODSG ATFM Delay Calculation
 ODT Operational Requirements and Data Processing Team
 ODT Operational Requirements and (ATM) Data Processing Team
 ODU Output Distribution Unit
 ODZ Origin Destination Zone
 OE Operational Entity
 Page 298
 EUROCONTROL AIRIAL
 Acronym Full form
 OE operating environment
 OEC Olno Executive Controller
 OECD Organisation for Economic Co-operation and Development (= OCDE)
 OED Operational Environment Definition
 OED Operational Environment Description
 OEM Original Equipment Manufacturer
 OEP Oceanic Entry Point
 OEP Operational Evolution Partnership
 OES Outside Electricity Supplies
 OES Outside Electric Supply
 OF Option Flag
 OFA Operational Focus Area
 OFAC Office Fédéral de l'Aviation Civile (CH) / Federal Office for Civil Aviation (=FOCA)
 OFDM Orthogonal Frequency Division Multiplexing
 OFF-PDR OFF Pre-Determined Route
 OFFPDR Off Predetermined Route
 OFFPDR OFF Pre-Determined Route
 OFG Operational Focus Group
 OFI Opportunity for Improvement
 OFIR Oceanic FIR
 OFIS Operational Flight Information Service
 OFL Off-Line
 OFP TF OAT Flight Plan Task Force
 OFS Ordered Field Sequencing (ASTERIX)
 OFST Offset (N-FDPS)
 OFZ Obstacle Free Zone (US)
 OGC Open Geospatial Consortium
 OGHFA Operators Guide to Human Factors in Aviation
 OGM Objectives > Goals > Mission
 OGRAN Open Gate Router Access Node
 OH Operational Handbook
 OHA Operational Hazard Analysis/Assessment
 OHD OverHeaD
 OHP Overhead Projector
 Page 299
 EUROCONTROL AIRIAL
 Acronym Full form
 OHTF Operational Harmonisation Task Force
 OI Operational Improvement
 OI Operational Instruction
 OI Operator Interface
 OID Object Identifier
 OIDS Operational Information Display System
 OIFG ORCAM Improvement Focus Group
 OIFG "Originating Region Code Assignment Method (ORCAM) Improvement Focus Group" or "ORCAM
 Improvement Focus Group"
 OIG Operational Implementation Group (Groupe de travail chargé de la mise en oeuvre opérationnelle)
 OIO Olno Input Operator
 OIS Obstacle Identification Surface
 OIS Office Information Systems
 OIT Organisation Internationale du Travail (=ILO)
 OJ Official Journal
 OJ L Official Journal of the European Union (Legislation)
 OJCT On-the-Job Conversion Training
 OJEC Official Journal of the European Communities
 OJT On-the-Job Training
 OJTI On-the-Job Training Instructor
 OJTI-e On The Job Training Instructor- e-Learning version
 OKAY normal operation resumed
 OL Operating Location
 OLA Operational Level Agreement
 OLDI On-Line Data Interchange (Échange de données en ligne)
 OLDINA OLNO, Diekirch, Nattenheim (Nattenheim area)
 OLDISP OLDI Specialist Panel
 OLE Object Linking & Embedding
 OLEVAT On-Line Exercise of Validation of Aircraft Trajectories
 OLM Output Link Management
 OLR Off Load Route
 OLRA Off-Load Route Activation Message
 OLRCNL Off-Load Route Cancellation Message
 OLRMOD Off-Load Route Modification Message
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 EUROCONTROL AIRIAL
 Acronym Full form
 OLS Off-Line System
 OLS Obstacle Limitation Surface(s)
 OM Outer Marker
 OM Operations Manual
 OM Ministerial Order
 OM Original Message
 OM Operation and Maintenance (phase)
 OMAS Operations Manager Airspace and Systems
 OMC Operational Monitoring Complex ; Operational Monitoring Cell (ACAS, AIG Subgroup)
 OMC Operational Monitoring Complex
 OMC Ods Monitoring and Control system
 OMD Operational Management Domain
 OMEGA OMEGA navigational facility
 Omega (Greek letter, upper case) Symbol for Omni directional
 OMG Object Management Group
 OMG Operational Monitoring Group (ACAS)
 OMI Organisation Maritime Internationale / International Maritime Organisation (=IMO)
 OMM Organisation Météorologique Mondiale / World Meteorological Organisation (=WMO)
 OMT Object Modelling Technique
 OMT Operations division Management Team
 ON Operational Notice
 ON Office Notice (note de service)
 ONBL Oat Non-BLocked ssr codes
 ONDA Office National Des Aéroports (Morocco)
 ONERA Office National d'Étude et de Recherche Aéronautique (France)
 ONL ON Line (device status)
 ONL On-Line
 ONP Open Network Provision (Telecommunications)
 OO Object Oriented
 OOA Object Oriented Analysis
 OOD Object Oriented Design
 OODBMS Object-Oriented Database Management System
 OOOI Out Off On In
 OOOI Out (Departure Block Time)-Off (Take-off)-On (Landing)-In (Arrival Block time)
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 EUROCONTROL AIRIAL
 Acronym Full form
 OOOI Off, Out, On and In times
 OOP Operational Outline Programme
 OOP Object Oriented Programming
 OOR Outline Operational Requirement
 OP Operational (issues)
 OP OPerational (device status)
 OP Organisational Productivity
 OPA OPAque type of ice formation
 OPA Operational Performance Assessment
 OPADD Operating Procedures for AIS Dynamic Data (EATCHIP)
 OPAL Optimisation Platform for Airports, including Landside
 OPAT Office des Ports Aériens de Tunisie / Tunisian Office of Airports
 OPB Outer Performance Boundary (Tunnel Concept)
 OPC Operational Control
 OPC OPerational Control (is indicated)
 OPC Operational Communications
 OPC OPto-Coupler
 OPD Operational Procedures Document (EAD)
 OPDU Operation Protocol Data Unit
 OPE Operational Systems Section (MUAC/ENG)
 OPER OPERative
 OPER Operational Mode (N-FDPS)
 OPERA Organsime parisien de contrôle en-route et d'approche
 OPEX Operational Expenditure
 OPIF Operator Interface
 OPLAN Operational Plan
 OPLINK Operational Data Link (Panel)
 OPLINK-P Operational Data Link Panel
 OPLINKP Operational Data Link Panel (ICAO)
 OPM Operational Position Management
 OPM Office of Personnel Management
 OPMA On-board Performance Monitoring and Alerting
 OPMET OPerational METeorological (information)
 OPN Operational Planning Notes (MADAP-KARLDAP)
 Page 302
 EUROCONTROL AIRIAL
 Acronym Full form
 OPN OPeN(ed), OPeNing
 OPNET Operational Network for ATS and System Management (Switzerland)
 OPO Olno Planning Overflow
 OPOSM Oat POSition Management
 OPQ Operational Professional Questionnaire
 OPR OPeRate, OPeRating, OPeRator, OPeRational, OPeRative
 OPR ATM Operational Requirements (EATCHIP Domain) ; ATM Working Rules and Operational Requirements
 OPR Operational Problem Report
 OpRep Operational Reply
 OPS Operational
 OPS Operations Support (EEC)
 OPS Operations
 OPS room Operations room
 OPSEC Operational Security
 OPSP Operations Panel (ICAO)
 OPT Operational testing
 OPTARION Mission Planning System (Airbus)
 OPTF OCG Prioritisation Task Force / Équipe spéciale sur la fixation des priorités de l'OCG
 OPTIMAL Optimised Procedures and Techniques for Improvement of Approach and Landing
 OPTIMI Oceanic Position Tracking Improvement & Monitoring
 OPX Off Premises eXtension
 OQAI Operations division QuAlity Improvement
 OQPSK Offset Quadrature Phase Shift Keying
 OR Originator-Recipient
 OR Operational Requirement
 OR-Address Originator Recipient Address
 OR-Name Originator Recipient Name
 ORA Operational Research and Analysis Group
 ORAS-TF Operational Requirements for ATS Systems Task Force
 ORB Object Request Broker
 ORCAM Originating Region Code Assignment Method (SSR)
 ORD Optimised Runway Delivery
 ORD indication of an ORDer
 ORD Operational Requirements Document (EATMS)
 Page 303
 EUROCONTROL AIRIAL
 Acronym Full form
 OREGIN Organisation of European GNSS equipment and Service Industries
 ORG Organisation
 ORG ORiGinal
 ORGMSG Original Message
 ORGN Originator
 ORGRTE Original Route
 ORM Operational Reply Message (Message opérationnel de réponse)
 ORM Operations Room Management
 ORMAQ Operation Room Management Attitudes Questionnaire
 ORName Originator Recipient Name
 Oro Navigacija State Enterprise Oro Navigacija, Lithuania
 OROCA Off-Route Obstruction Clearance Altitude
 ORP Outsourcing Renewal Project
 ORP Optional Response Poll
 ORQ D-OTIS Request Message
 ORR Operational Readiness Review
 ORs Operational Requirements
 ORSG Operational Requirements Sub-Group
 ORT Owner Requirement Table
 ORTCA Off-Route Terrain Clearance Altitude
 ORTF Operational Requirements Task Force
 OS Originating System
 OS Operating System
 OS GALILEO Open Service
 OS Organisation syndicale
 OS/2 Operating System / 2
 OSA Operational Safety Assessment
 OSA Operational Safety Analysis
 OSA Operational Support Applications team (Équipe « Applications d'appui opérationnel »)
 OSC Operations Steering Committee
 OSCAR Orbiting Satellite Carrying Amateur Radio
 OSD Operational Scenarios Document
 OSDR Operational Support Data Retrieval
 OSED Operational Service and Environment Definition
 Page 304
 EUROCONTROL AIRIAL
 Acronym Full form
 OSEIC Operational Services and Environment Information Capture
 OSF Open System (Software) Foundation
 OSG Operations Sub-group (of the EAG)
 OSG Operational Services Group (MAS)
 OSHE Occupational Safety, Health & Environment {strategy), MUAC
 OSI Open Source Initiative
 OSI Open Systems Interconnection
 OSI CLNP OSI ConnectionLess Network Protocol
 OSI-RM Open Systems Interconnection - Reference model
 OSICP Operational Safety and Infrastructure Contingency Procedures
 OSIE OSI Environment
 OSIRM Open Standards for Interconnection Reference Model
 OSM Optimised Sector Manning
 OSM Operational Systems Management section (of ENGD) (Section « Gestion des systèmes opérationnels »)
 OSPF Open Shortest Path First
 OSS Operator SubSystem
 OSS Open Source Software
 OST Office of the Secretary of Transportation (U.S.)
 OST On-site Training
 OST Operational Support Team (of FDOD)
 OST Operational Support Traffic
 OSTI On-site Training Instructor
 OSV Officier de Sécurité des Vols
 OT Operational Training
 OTAN Organisation du Traité de l'Atlantique Nord (= NATO)
 OTCG Operational Technical Coordination Group (Groupe de coordination technicoopérationnelle)
 OTD D-OTIS Delivery Message
 OTD Operational Target Date
 OTD Other Training Device
 OTF Operational Task Force
 OTF On Top Fix
 OTF Operational, Technical and Financial Working Group
 OTF (VHFOTF) Operational VHF Task Force
 OTF/BFWG Combined Operational, Technical/Budgetary & Financial Working Group
 Page 305
 EUROCONTROL AIRIAL
 Acronym Full form
 OTGS Ods - Target Generation System
 OTH OTHer
 OTH Over-the-Horizon
 OTH (R) Over The Horizon (Radar)
 OTIS Operational Terminal Information Service
 OTMV Occupancy Traffic Monitoring Values
 OTP Overall Test Plan
 OTR Ods Toolbox Rps extension
 OTR Operational Turn Around
 OTS Out of service (US)
 OTS Off-The-Shelf
 OTS Organised Track System
 OTSD Optimized Traffic Systems Development GmbH
 OTSG Operational Training and Selection Group
 OTSP OK-to-start-package (DEVD)
 OTT D-OTIS Termination Request
 OTT Observed Tactical Trajectory (N-FDPS)
 OTT D_OTIS Termination Message
 OTV Orbital Transfer Vehicle
 OU Organisational Unit
 OUBD OUtBounD
 OUG ORCAM Users Group
 OUMSESTF Operational Use of Mode S Enhanced Surveillance Task Force
 OUNS Operational Navigation System
 OUR Operational User's Request
 OURASIE Ourasie Toolkit, software X-windows toolkit built above Xt Intrinsics layer (CENA in-house product)
 OUTREG Out of Regulation
 OV operational view
 OVC OVerCast
 OVF Optically Variable Feature
 OVO OpenView Operations
 OVV Onderzoeksraad Voor Veiligheid (Dutch Safety Board)
 OWA Outlook Web Access
 OWN select/deselect line 3 of OWN traffic labels
 Page 306
 EUROCONTROL AIRIAL
 Acronym Full form
 Own TCAS II equipped aircraft - source of TCAS event
 OWN SEC Own Sector (N-FDPS)
 OWS One Way Simultaneous
 OWS OGC Web Services
 P Priority
 P Process Log
 P Prohibited Area
 P Prefix (CCITT X.121 Structure)
 P & A Partnership & Agreements (Unit of DR)
 P&H Press & Hold, (Mouse / Trackball Button)
 P&H Press and Hold (mouse)
 P,R,D Area Prohibited, Restricted, or Danger Area
 P-channel Packet Mode Channel
 P-code Precision Code (GPS)
 P-Gate Planning Gate (DEVD)
 P-MAP Paper MAP
 P-RNAV Precision RNAV (RNAV de précision)
 P-t-P Point-to-Point
 P... Prefix to a Prohibited area identification
 P.800-Method ITU-T recommendation: Methods for subjective determination of transmission quality
 P.862 ITU-T recommendation: Perceptual Evaluation of Speech Quality
 P.ACCs Pairs of ACCs
 p.t.t Push-to-Talk
 P/AR Peak-to-Average Ratio
 P/F Poll bit (in command frame) and Final bit (in response frame)
 P1 Store and Forward Protocol
 P1 message transfer Protocol
 P1 Pulse 1 (SSR)
 P2 Pulse 2 (SSR)
 P2 interpersonal messaging Protocol
 P2 Protocol No 2
 P2FEP PETAL II Front End Processor
 P2GW Petal II GateWay
 P3 Submission and delivery protocol
 Page 307
 EUROCONTROL AIRIAL
 Acronym Full form
 P3 Pulse 3 (SSR)
 P3 submission & delivery Programme
 P35 Protocol No 3
 P4 Pulse 4 (SSR)
 P5 Pulse 5
 P6 Pulse 6
 P7 Message Retrieval Protocol
 PA Performance Appraisal
 PA Provisional Acceptance
 PA Precision Approach
 PA Power Amplifier
 PA Participating Area
 PA Passenger Address
 PA Public Address
 PA1 Precision Approach runway category I
 PA2 Precision Approach runway category II
 PA3 Precision Approach runway category III
 PAA Plot Accuracy Analysis
 PAB Proposal Analysis Board
 PABI Post-OPS Analysis and Business Intelligence
 PABX Private Automatic Branch Exchange
 PAC Conflict Alert Prediction
 PAC Preliminary Activation message (OLDI)
 PAC Pacific Region (ICAO)
 PACE Perspectives for Advanced Communications in Europe
 PACF Performance and Checkout Facility
 PACS Pan-European Airport Capacity and Delay Analysis Support
 PACT Portable ACC Capacity Tool
 PAD Packet Assembler/Dis-Assembler
 PAD Programme Acronyms and Definitions
 PADAC PRISMIL Automated Data Acquisition and Collection tool
 PADIS Passenger and Airport Data Interchange Standards
 PAF-A Percentage of Advanced Flights on Arrival
 PAF-D Percentage of Advanced Flights on Departure
 Page 308
 EUROCONTROL AIRIAL
 Acronym Full form
 PAGAR Performance Assessment and Gap Analysis Report
 PAGODA Profile Alignment Group for ODA (Open Document Architecture)
 PAK Pilot Acknowledgement (service)
 PAL Procedure Assurance Level
 PAL Programmable Array Logic
 PAL Phase Alternation Line (TV transmission mode, D)
 PALLAS Phased Automation of the Hellenic ATC System (new Greek ATC System)
 PALS Precision Approach Landing System
 PALS Precision Approach Lighting System
 PAM Programme Analysis Madap, Programme Analysis Module
 PAM Pulse Amplitude Modulation
 PAM Pilot Acknowledgement Message
 PAMCS Panel on Air Space Management and Control Systems
 PAMELA Parametric ATM Model for Economic Long-term Assessment
 PAMPA Platform for Aircraft Modelling Performance Analysis (CARE)
 PAMPL Programme Analysis Module rePLay position
 PAMPLAY PAM rePLAY system
 PAMS Published AIP Management System
 PANS Procedures for Air Navigation Services
 PANS-ABC Procedures for Air Navigation Services - ICAO Abbreviations and Codes (ICAO Doc. 8400)
 PANS-AIM Procedures for Air Navigation Services - Aeronautical Information Management
 PANS-ATM Procedures for Air Navigation Services - Air Traffic Management (ICAO Doc 4444)
 PANS-OPS Procedures for Air Navigation Services - Aircraft Operations
 PANS-OPS/I Procedures for Air Navigation Services - Aircraft Operations - Flight Procedures (ICAO Doc. 8168/I)
 PANS-OPS/II Procedures for Air Navigation Services - Aircraft Operations - Construction of Visual & Instrument Flight
 Procedures (ICAO Doc. 8168/II)
 PANS-RAC Procedures for Air Navigation Services - Rules of the Air and Air Traffic Services
 PANSA Polish Air Navigation Services Agency (Polska Agencja Zeglugi Powietrznej)
 PAPI Precision Approach Path Indicator
 PAQ Position Analysis Questionnaire
 PAR Planning, Analysis and Reporting
 PAR Precision Approach Radar
 PARADISE Prototype of an Adaptable and Reconfigurable ATM Demonstration and Integration Simulator Environment
 PARI Precursor, Action, Result, Interpretation
 Page 309
 EUROCONTROL AIRIAL
 Acronym Full form
 PARI method Precursor, Action, Result, Interpretation Method
 PARL PARaLlel
 PARR Problem Analysis, Resolution and Ranking
 PARS Performance Analysis & Reporting System
 PARZOC Parabolic Approximation of Aircraft Performance for use in a ZOC
 PAS Psycho-Active Substance
 PASAS Predictive Airborne Separation Assurance System
 PASS Performance and Safety Aspects of STCA - full study (Étude globale de la performance et de la sécurité
 STCA)
 PASSUR Passive Surveillance System
 PAT Performance Assurance Tool
 PAT Port Address Translation
 PAT Provisional Acceptance Testing (CNG - CBN)
 PAT PHARE Advanced Tools (Outils évolués PHARE)
 PATA Polish Air Traffic Agency
 PATC Precision Approach Terrain Chart (ICAO)
 PATCG PHARE Advanced Tools Coordination Group
 PATCHWORK Polish ATC Harmonisation Work programme (EAS)
 PATCO Professional Air Traffic Controllers Association (US)
 PATCO Principle ATCO
 PATIN Protection of Air Transportation and Infrastructure (Protection du transport aérien et de l'infrastructure
 connexe)
 PATIO Platform for ATM Tools Integration up to pre-Operation
 PATN PHARE experimental Aeronautical Telecommunication Network
 PATROCLOS Peripheral Airports Terminal Radars, ODS and Centrally Linked Operations System
 PATs PHARE Advanced Tools
 PATWAS Pilot Automatic Telephone Weather Answering Service
 PAU Primary Authorised User
 PAX Passenger(s)
 PB Project Board
 PBA Performance Based Approach
 PBE Peripheral Bus Extender (CBN - CNG)
 PBIM performance-based information management
 PBL Problem-Based Learning
 PBMO Planning Board Maastricht Operational
 Page 310
 EUROCONTROL AIRIAL
 Acronym Full form
 PBN Performance Based Navigation
 PBNSG Performance-Based Navigation Study Group (ICAO)
 PBO Projected Benefit Obligations (obligation projetée au titre des services passés)
 PBR Plot Based Resolution Analysis
 PBRA Plot Based Resolution Analysis
 PBTG Performance-Based Transition Guidelines
 PBX Private Branch Exchange
 PBX Public Branch Exchange
 PC Protocol Field
 PC Peripheral Controller
 PC Personal Computer
 PC Provisional Council (Conseil provisoire)
 PC Premier contrôleur (qualification de contrôle)
 PC Protocol Control (bits)
 PC Plotting Chart (ICAO)
 PC Planning Coordinator
 PC Planning Controller (organique)
 PC-based Personal Computer-Based
 PCA Prior Coordination Airspace (EUROCONTROL, FUA)
 PCA Physical Configuration Audit
 PCA Principal Component Analysis
 PCB Printed Circuit Board
 PCC Planning Coordination Controller
 PCC Peripheral Computer Complex
 PCC Provisional Council Coordinating Committee (Comité de coordination du Conseil provisoire)
 PCC Project Coordinating Committee (PETAL)
 PCC Polygone Coordination Centre
 PCCB Program Change Control Board (FPPS/DECADE)
 PCCB PC Change Control Board
 PCD Planning Controller Display
 PCD Pre-departure Clearance
 PCD Probability of Code Detection
 PCD ProCeeD(ing)
 PCD Personal and Career Development
 Page 311
 EUROCONTROL AIRIAL
 Acronym Full form
 PCDE PC Development Environment Working Group
 PCDE Portable Common Development Environment
 PCFL Preferred Cruise Flight Level
 PCI Programme Controlled Interrupt
 PCI Protocol Control Information
 PCI Permanent Commission for Investigation (on ATS incidents) ; Permanent Committee of Inquiry
 PCIP Pilot Conversion and Implementation Plan
 PCL Pilot Controlled Lighting
 PCL Procedure Changeover Lines (IFF)
 PCL Pending and Coast List
 PCM Planning Control Message
 PCM Pulse Code Modulation
 PCMA Post Code Modulation using A-law companding
 PCMP Project Configuration Management Plan (MAS - ODS)
 PCMS Product Configuration Management System
 PCMT Plan Commun à Moyen Terme / Common Medium-Term Plan (=CMTP)
 PCMU Post Code Modulation using Mu law companding
 PCN Planning Controller eNtry
 PCN Pavement Classification Number
 PCP Project Control Plan
 PCP Previous Exit Coordination Partner (N-FDPS)
 PCP Pilot Common Project
 PCPB Provisional Council President's Bureau (Bureau du Président du Conseil provisoire)
 PCPC Programme de contrôle et de prévention de la corrosion (Corrosion Prevention and Control Program - CPCP)
 PCPU PCM Central Processing Unit (VCS)
 PCR Post-Conference Report
 PCR Problem Change Request
 PCR Peak Cell Rate
 PCR Planning Controller Radar, (later to become Planning Controller Exit)
 PCR Periodic Contract Request (ICAO)
 PCS Process Control System
 PCS Personal Communications Services
 PCS Phase Control System
 PCT Planning Control Theory
 Page 312
 EUROCONTROL AIRIAL
 Acronym Full form
 PCTE Portable Common Tool Environment
 PCV Probability of Code Validation
 PCX A window-compatible BIT format
 PD Pulse Doppler
 PD Probability of Detection
 PD Plot Detection
 Pd Probability of detection
 PD Pointing Device
 PD Protocol Discriminator
 PD Plan Display
 PD PHARE Demonstration
 PD-Channel Packet Data Channel
 PD/1 PHARE Demonstration 1
 PD/1+ PHARE Demonstration 1+
 PD/1++ PHARE Demonstration 1++
 PD/2 PHARE Demonstration 2
 PD/2+ PHARE Demonstration 2+
 PD/3 PHARE Demonstration 3
 PDA Personal Digital Assistant
 PDA Planning Coordination Message Display Area
 PDA Plot Detection Analysis
 PDA Physical Delivery Access
 PDA Probability of Detection Analysis
 PDA Probabilistic Data Association (ARTAS)
 PDAI Predetermined Address Indicator
 PDATM Principal Director ATM
 PDATM/OFF Office of the Principal Director ATM
 PDAU Physical Delivery Access Unit
 PDC Pre-Departure Clearance (message)
 PDC Peripheral Device Controller
 PDC Private Data Channel
 PDCA Plan Do Check Act
 PDD Project Definition Document
 PDE Path Definition Error
 Page 313
 EUROCONTROL AIRIAL
 Acronym Full form
 PDES Pulse Doppler Elevator Scan
 Pdet Probability of detection
 PDF Portable Data Format
 PDF Portable Document Format
 PDF Percentage of Delayed Flights (Delay Parameter Abbreviations)
 PDF-A Percentage of Delayed Flights on Arrival
 PDF-D Percentage of Delayed Flights on Departure
 PDFG PENS Development Focus Group
 PDFG PENS Development Focus Group
 PDG Procedure Design Gradient
 PDH Plesiochronous Digital Hierarchy
 PDL Program Design Language
 PDL Persistent Data Library
 PDLC Product Development Life Cycle
 PDM People Development Manager (Gestionnaire "Développement du personnel")
 PDME Precision Distance Measuring Equipment
 PDMS Personal Data Management System
 PDN Public Data Network
 PDO Financial Cycle Planning & Development Office (DF)
 PDOP Position Dilution of Precision
 PDP Polar Diagram Plotter
 PDP11 Programmable Data Processor Mark 11 (DEC)
 PDR Pre-Determined Route
 PDR Preliminary Design Review
 PDR Principal Director of Resources
 PDRP Problem Detection and Resolution
 PDS Programme Development System
 PDS Portable Data Store (Eurofighter)
 PDS Pairing Distribution System
 PDS Physical Delivery Service
 PDTWG Plot Data Transmission Working Group
 PDU Power Distribution Unit
 PDU Protocol Data Unit (RMCDE)
 PDU People Development Unit (Unité "Développement du personnel")
 Page 314
 EUROCONTROL AIRIAL
 Acronym Full form
 PE Performance (of an Aircraft)
 PE Parity Error
 PE Protected Earth
 PE Parameters of the Earth
 PE Protective Earth (Electrical connection)
 PE Processor Element (CBN - CNG)
 PE Process Engineering
 PE Ice PEllets
 PE 90 Parameters of Earth, 1990. Russian Geodetic System
 PEA Parameter and Environment Assembler
 PECO Pays d'Europe Centrale et Orientale (FR)
 PECU Pressure Error Corrector Unit
 PED Personal Electronic Devices
 PED Portable Electronic Device
 PEE Position Estimate Error
 PEF Pan-European Functions
 PEGASE Providing Effective Ground & Air data Sharing via Extended Projected Profile
 PEGASUS Prototype EGNOS and GBAS Analysis System Using SAPPHIRE
 PEGASUS Pan-European Ground/Air Single Unified ATM System
 PEL PErsonnel Licensing
 PEL Planned Entry Level (to a sector or volume of airspace) (ODID)
 PELA Proficiency test in English Language for ATCOs
 PEM Phone Emergency Module
 PEN Pan-European Network
 PENS Pan-European Network Service
 PENS-VPN Pan-European Network Services-Virtual Private Network
 PENV Professional Environment
 PEP Performance Engineering Programme (long-term scientific studies)
 PER Packet Encoding Rules
 PER PERformance
 PER Programme Event Recording
 PERM PERManent
 PEROP Performance-Based Airspace Operations
 PERT Programme Evaluation and Review Technique
 Page 315
 EUROCONTROL AIRIAL
 Acronym Full form
 PES Proposed EUROCONTROL Standard Document
 PESQ Perceptual Evaluation of Speech Quality
 PESQ-LQO Perceptual Evaluation of Speech Quality - Listening Quality Objective
 PETAL Preliminary EUROCONTROL Test of Air-Ground Data Link (Essai EUROCONTROL préliminaire de la liaison
 de données air-sol)
 PEWP Physical EWP identity
 PEX PHIGS Extended X-Windows System
 PEX Programmers Extension to X
 PF Pilot Flying
 PFA Probability of False Alarm
 Pfa Probability of False Alarm
 pFAST passive Final Approach Spacing Tool
 PFD Primary Flight Display
 PFD Planned Flight Data
 PFD Predicted Flight Data
 PFD Probability of Failure Detection
 PFE Pharos Front End
 PFE Path Following Error
 PFE Performance Flow Management Performance and Efficiency (EEC)
 PFI Private Finance Initiative
 PFIS Passenger Flow Information Service
 PFL Planned Flight Level
 PFLext Probability of Failure/Fault Localisation, external
 PFLint Probability of Fault Localisation, internal
 PFM Pre-Flight Messages (EW)
 PFN Pulse Forming Network
 PFO Planning Front Office
 PFR Performance, Forecasts and Relations
 PFR Probability of Failure Repair
 PFS Plan Flight Store
 PFSB EUROCONTROL Pension Fund Supervisory Board (Conseil de surveillance du Fonds de pension
 EUROCONTROL)
 PGA Pin Grid Array
 PGM ProGraMme
 PGMP Pilot Group on ATCO Manpower Planning
 Page 316
 EUROCONTROL AIRIAL
 Acronym Full form
 PGN Pulse GeNerator
 PGP Pretty Good Privacy
 PGS Personnel / General Services Team (of ADB)
 PGS Perimeter Guard System
 pH Potenz Hydrogen (acidity)
 PH Presentation Header
 PHA Preliminary Hazard Analysis
 PHARE Poland, Hungary Aid for Restructuring of the Economy (European Commission)
 PHARE Programme for Harmonised ATM Research in EUROCONTROL (Programme de recherche harmonisée de
 l'Organisation EUROCONTROL en matière de gestion de la circulation aérienne)
 PHAROS Plan Handling and Radar Operating System (NL - Military)
 PHB Per-Hop Behaviours
 PHD Project History Document
 PHI Preliminary Hazard Identification
 PHIDIAS Position Harmonisant et Intégrant des Dialogues Intéractifs / Harmonizing and Interactive Dialogue Integrating
 Position
 PHIGS Programmer's Hierarchical Interactive Graphics System
 PHM Passive Hydrogen Maser (Atomic Clock)
 PHP Hypertext Preprocessor
 PI Peripheral Interface (CBN - CNG)
 PI Parity Information
 PI Procedure Turn to Intercept (ARINC 424 Path Terminator)
 PI Parity / Interrogator Identifier
 PI Performance Indicator
 Pi (Greek letter, lower case) Symbol for pi (approx. 3.14159)
 PIAC Peak Instantaneous Aircraft Count
 PIAF Pc-gestüzte Individuale Ausbildung Flugsicherung
 PIATA Performance Indicator Analysis Tool for Airports
 PIATA+ Performance Indicator Analysis Tool for Airports +
 PIB Preflight Information Bulletin (Bulletin d'information pré-vol)
 PIB Policy Information Base
 PIB Pilot Information Briefing
 PIB Produit Intérieur Brut
 PIB Pre-flight Information Bulletin (EAD)
 PIB Policy Information Base
 Page 317
 EUROCONTROL AIRIAL
 Acronym Full form
 PIC Pilot in Command
 PICAO Provisional International Civil Aviation Organization
 PICAP Programa de Investigacion de Capacidad de Pista
 PICASSO Control, Analysis and Monitoring of the Spanish Air Navigation System Statistical application
 PICOS Parts Inventory Control On-line System
 PICS Protocol Implementation Conformity Statement
 PID Product Identification Description
 PID Pilot Information Downlink
 PID Pilot Intention Downlink
 PIF Picture Interchange Format
 PIF Programme Information File
 PIM Programme Implementation Management
 PIM Protocol Independent Multicast
 PIM Personal Information Manager
 PIMB Pcte Interface Management Board
 PIN Personal Identification Number
 PIN Positive Intrinsic Negative
 PinS Point in Space
 PinS Point in Space (helicopters)
 PINT PSTN and Internet Interworking
 PINX Private Integrated Network Exchange
 PIO Pilot-Induced Oscillation
 PIP Plug In Panel
 PIP Product Improvement Package
 PIP project initiation phase
 PIR Part of Information Region
 PIR Project Initiation Report (SESAR)
 PIREP Pilot Report (ICAO)
 PIRG Planning and Implementation Regional Group
 PISC Pre-Implementation Safety Case
 PISN Private Integrated Services Network
 PIU Parent IFPS Unit
 PIW Weekly Planned Interventions
 PIXEL Picture ELement
 Page 318
 EUROCONTROL AIRIAL
 Acronym Full form
 PJE Parachute Jumping Exercise
 PKCS Public Key Cryptosystems
 PKD Public Key Directory (ICAO)
 PKI Public Key Infrastructure
 PL Pseudolite
 PL Plain Language
 PL Poland
 PL Procedural Language
 PL Protection Levels
 PL/SQL Procedural Language/Structured Query Language
 PLA Practice Low Approach
 PLANE Platform for Logistics and Aviation Networks in Europe
 PLANO Procedures Linked to Abating Noisy Operations (ANCAT TF)
 PLATON new RDPS
 PLB Personal Locator Beacon
 PLC Planning Controller (also known as Coordinator)
 PLC Programmable Logic Controller
 PLCC Plastic Leaded Chip Carrier
 PLI Pitch Limit Indication
 PLL Phase Locked Loop
 PLM Position Log Management
 PLMN Public Land Mobile Network
 PLN sdd PLaN track(s)
 PLN (ARTAS) Plan
 PLN Flight Plan Conformance (new name is FLIPCY)
 PLN flight PLaN
 PLNR PLaNneR
 PLO PLOtter
 PLOC Prolonged Loss of Communications
 PLP Packet Layer Processing
 PLP Packet Layer Protocol
 PLPL Predicted Lateral Protection Levels
 PLV Presentation Level Video
 PLVL Present LeVeL
 Page 319
 EUROCONTROL AIRIAL
 Acronym Full form
 PM Programme Management
 PM Pilot Monitoring (i.e. Pilot Not Flying = PNF)
 PM Presentations Manager
 PM Progress Meeting
 PM Phase Modulation
 PM Project Management
 PM/FL Process Monitoring / Fault Location
 PMA Pilot-monitored approach
 PMB POEMS Management Board
 PMB Project Management Bureau
 PMB Project Management Board
 PMB Programme Management Board
 PMBO Project Management Board Operation
 PMC Path Management Control
 PMC Project Management Centre (from DEVD)
 PMC Project Management Cell
 PMC Programme Management Cell
 PMCG Preliminary Maastricht Coordination Group
 PMCS Performance Management Computer System
 PMCT People Management Core Team
 PMD Pre-warning Message for Departure
 PME Pre-warning Message Entry (OAT)
 PMH Problem Management Hardware
 PMM People Management Meeting (EEC)
 PMMM Programme Management Maturity Model
 PMN Planning Message eNtry (OAT)
 PMO Project Management Office
 PMO Pre-warning Message OAT
 PMOS P-type Metal Oxide Semiconductor
 PMP Project Management Plan
 PMP Programme Management Plan
 PMS Point Merge System
 PMS Performance Management System
 PMS Pantone Matching System (for colour printing)
 Page 320
 EUROCONTROL AIRIAL
 Acronym Full form
 PMT Portable Maintenance Terminal
 PMT Plan à Moyen Terme (MTP)
 PMTU Path Maximum Transmission Unit
 PMU Project Management Unit
 PMU PENS Management Unit
 PMW Project Management (or Manager) Workbench
 PMX Planning Message eXit
 PN Prior Notice (required)
 PNdB Perceived Noise Decibels
 PNF Pilot Not Flying (= Pilot Monitoring : PM)
 PNIC Private Network Identification Code
 PNL Passenger Name List
 PNLT Tone corrected perceived noise level
 PNNI Private Network-to-Network (or Network Node) Interface
 PNO Public Network Operator
 PNR Point of No Return
 PNT Point
 PNT Position, Navigation and Timing
 PO dust devils
 PO Principle of Operation
 PO Purchase Order
 PO-ASAS Principles of Operation of ASAS
 POA Plain Old ACARS
 POA Portable Object Adapter
 PoACCS Portuguese Air Command and Control System
 PoAF Portuguese Air Force
 POB Persons On Board
 POC Point of Contact
 POD Planning at Operations Division
 POD Port of Debarkation
 PODIUM Proving Operations of Drones with Initial UTM (SESAR Horizon 2020 project)
 POE Port of Embarkation
 POEMS Pre-Operational European Mode S
 POF Problem-Oriented Flight Leg (N-FDPS)
 Page 321
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 Acronym Full form
 POG Point of Gaze
 POH Pilot's Operating Handbook
 POH Path Overhead
 PoLo Position Logging System
 POP Point of Presence
 PoR Point of Risk
 POR Pacific Ocean Region
 POR Power-On Reset
 POS (Target) POSition as indicated by rlb marker
 POS Position
 POSC Post-Implementation Safety Case
 Positive RA RA applying minimum vertical rate (eg climb)
 POSIX Portable Operating System Interface for computer environments
 POSLOG POSition LOG management
 POST Power-On Self Test
 POT POTentiometer
 POT Point of Tangency
 PP Present Position (Eurofighter)
 PPC Policy Planning Committee
 PPC Physical Protected Circuit
 PPC Projects, Procurement and Communications Section (of ENGD)
 PPD Plans and Policy Division
 PPD Pilot Preference Downlink
 PPD Pilot References Downlink
 PPD Potential Problem Display
 PPD Planned Problem Display (N-FDPS)
 PPDS Personal Printer Data Stream
 PPI Permanent Partial Invalidity
 PPI Plan Position Indicator
 ppi Points Per Inch
 PPI Points Per Inch or points per inch
 PPI Plan Position Indicator
 PPL Private Pilot License (US)/Licence (Eur)
 PPL Private Pilot's License (US)/Licence (Eur)
 Page 322
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 Acronym Full form
 PPL Project Participant List
 PPL/PATA Polish Airports State Enterprise/Polish Air Traffic Agency
 PPLI Precise Position Location and Identification
 ppm parts per million
 PPM Pages per Minute
 PPM Pulse Position Modulation
 PPM Programme Portfolio Management (EATM)
 PPM/TF Task Force on the Possible Pricing Mechanisms
 PPOS Present Position
 PPP Public-Private Partnership
 PPP Purchasing power parities
 PPP Point-to-Point Protocol
 PPR Prior Permission Required
 PPS Precision Positioning Service/System
 pps Pulses Per Second
 PPS Precise Positioning Service
 PPS Pulses Per Second
 PPS-SM Precise Positioning Service Security Module
 PPSDN Private Packet Switched Data Network
 PPSDNS Private Packet Switched Data NetworkS
 PPSN Present PoSitioN
 PPSN Public Packet-Switching Network
 PPT PowerPoint
 PQM Project Quality Manager
 PQP Project Quality Plan
 PQP Programme Quality Plan
 PR Purchase Requisition (Demande d'achat)
 PR Plot Reconstruction
 PR Path Replacement
 PR Primary Radar
 PR Pseudo Range
 PR Printer
 PR Problem Report
 PR Packet Number
 Page 323
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 Acronym Full form
 PR Probability of Reply (control bit)
 PR Position Reporting
 PR(M) Product Release (Milestone)
 PR/PSR Primary (Surveillance) Radar
 PRA Plot Resolution Analysis
 PRA Primary Rate Access
 PRA Project Review Authority
 PRA PRocedural Areas map
 PRA PRocedural Areas/windows
 PRAISE Preparation for Research and Development in Support of EATMS programme
 PRAWNS Pressure, Roles, Airports, Weather, Non-Standard/Priority Info, Strips to display
 PRB Performance Review Body (organe d'évaluation des performances)
 PRB Project Review Board
 PRBS Pseudo Random Bit Sequence
 PRC Performance Review Commission (Commission d'examen des performances)
 PRE Priority PREference bit
 PRE Preview
 PRE PREvious (centre)
 Pre-OJT Pre-On-the-Job Training
 Pre-Simul Pre-Simulation
 preC PreCouncil (= to replace CE)
 PREDSIT PREDicted SITuation
 PRES Present Heading (N-FDPS)
 PREV PREVious
 PREV RTE Previous Route (N-FDPS)
 PREVAIL PReparation for EGNOS VAlidation In approach and Landing
 PREVI Data Processing system to support the forecast and regulation of the air traffic (FR)
 PRF Percentage of Regulated Flights(Delay Parameter Abbreviations)
 PRF Pulse Repetition Frequency
 PRFD PRF Discriminator
 PRI Primary (N-FDPS)
 PRI Primary (radar or unit)
 PRI Pulse Repetition Interval
 PRI PRInted board
 Page 324
 EUROCONTROL AIRIAL
 Acronym Full form
 PRIF PROC Interface Tool
 PRIO key allowing participation in a current communication
 PRISME Pan-European Repository of Information Supporting the Management of EATM (Gisement paneuropéen
 d'informations à l'appui de la gestion de l'EATM)
 PRISMIL Pan-European Repository of Information Supporting Military Key Performance Indicators
 PRKG PaRKinG
 PRL Pilot Request, Level (service)
 PRM Precision Radar Monitoring
 PRM Passengers with Reduced Mobility
 PRM Parallel Runway Monitor
 PRM Precision Runway Monitoring
 PRM Precision Runway Monitor
 PRMA Packet Reservation Multiple Access
 PRMD Private Management Domain
 PRN Pseudo Random Noise
 PRN Code Pseudo Random Noise Code
 PRNAV Precision Area Navigation
 ProATN Prototype Aeronautical Telecommunications Network
 PROB PROBability
 PROC PROCedure
 PROC Procurement (DF)
 PROC Procurement (tool)
 PRODAT PROSAT Data Link Experiment
 PROFI Multinational Project Financing
 PROH PROHibited(ion)
 PROM Programmable Read-Only Memory
 PROOF Primary Rate isdn Osi Office Facilities
 PRORES Problem Resolution
 PROSAT PROmotion of SATellites (ESA)
 PROSIT Problem Situation
 PROT PROTected(ion)
 PROV PROVisional
 PROVE European ATC Pre-Operational Validation & Experimental Trials platform
 PRP Pulse Repetition Period
 Page 325
 EUROCONTROL AIRIAL
 Acronym Full form
 PRPL PC RPL System
 PRQ Pilot Request (service)
 PRR Performance Review Report (Rapport d'examen des performances)
 PRR Performance Review Report
 PRR Pilot Request, Route (service)
 PRR1 Performance Review Report
 PRS Public Regulated Service (GALILEO)
 PRS Performance Review System (dispositif d'examen des performances)
 PRS Picture Repetition Store
 PRS Performance Review Service (service d'examen des performances)
 PRS Picture Refresh Store
 PRSG Performance Review Sub-Group
 PRT Processing Response Time (EUROCONTROL)
 PRT PRinTer
 PRT Pulse Repetition Time
 PRT Preferences Tool
 PRU Performance Review Unit (bureau d'examen des performances)
 PRX Proximity (ADPS)
 PS Publication System
 PS Problem Solver (PATs)
 PS Position Symbol
 PS Problem Statement
 PS PluS
 PS Power Supply (ACS)
 PSA Preliminary Safety Assessment
 PSA Primary Subject Area
 PSA Provisional Site Acceptance
 PSA Passive Slot Allocation
 PSAL Provisional Slot Allocation List
 PSAP Presentation Service Access Point
 PSB Parallel System Bus (RADNET)
 PSC Project Safety Committee
 PSC Performance, Standard, Conditions
 PSC Performance Steering Committee (NM)
 Page 326
 EUROCONTROL AIRIAL
 Acronym Full form
 PSC Project Steering Committee
 PSCO Predicted Situation Communication Object
 PSD Phase Sensitive Detector
 PSD Packet Switched Data
 PSD Power Spectral Density
 PSD Phase Sensitive Discriminator
 PSDN Packet Switched Data Network
 PSDN Public Switched Data Network
 PSE Path Steering Error
 PSE Project Safety Engineer
 PSE Packet Switch Exchange
 PSE PleaSE
 PSE Primary Surveillance Equipment
 PSG Programme Steering Group
 PSG PaSsinG
 PSG (OATA) Project Steering Group
 PSK Phase Shift Keying
 PSM Practical Supervisory Manual
 PSMC Packet System Management and Control Channel
 PSMSL Permanent Service for Mean Sea Level
 PSN Public Switched Network
 PSN Packet Switched Network
 PSN PoSitioN
 PSO Project Support Office (S-JU)
 PSO Programme Support Office
 PSP Primary Spare Part
 PSP Programme Segment Prefix
 PSPDN Packet Switched Public Data Network
 PSPEC Process Specification
 PSR Psychosocial risks (risques psychosociaux - RPS)
 PSR Primary Surveillance Radar (Radar primaire de surveillance)
 PSS Paperless Strip System
 PSS Perimeter Surveillance System
 PSS1 Private Signalling System No.1
 Page 327
 EUROCONTROL AIRIAL
 Acronym Full form
 PSS1 Private Signalling System 1
 PSSA Preliminary System Safety Assessment
 PSSG PEN Service Steering Group
 PSSR Present Secondary Surveillance Radar -code- (MADAP)
 PST Project Support Team
 PST Project Supervision Team (EATCHIP)
 PST Pacific Standard Time, UTC -8h. (USA)
 PSTF Pension Scheme Task Force (Équipe spéciale "Régime de pensions")
 PSTN Public Switched Telephone Network
 PSU Programme Sequencing Unit
 PSU Power Supply Unit
 PSV Pilotage sans visibilité
 PSW Programme Status Word
 PT special reporting PoinT
 PT Payload Type
 PT Predicted Trajectory
 PT Portugal (country identifier)
 PT Point : ENV data entity type
 PT ID Point Identification
 pt to pt Point-to-Point
 PT502 ATS QSIG Test Equipment
 PTC Partner Training Center
 PTC Precision Trajectory Clearance
 PTE POEMS Test Environment
 ptfe Poly-Tetra FluorEthylene
 PTI Packet Type Identifier
 PTI Payload Type Identifier
 PTI Permanent Total Invalidity
 PTI Protection de Travailleur Isolé (LWP)
 PTID Point Identification
 PTL Predicted Track Line
 PTM Point-to-Multipoint
 PTM Pulse Timing Modulation
 PTM Programmable Timer Module
 Page 328
 EUROCONTROL AIRIAL
 Acronym Full form
 PTN Public Telephone Network
 PTN Private Telecommunication Network
 PTN Procedure TurN
 PTO Preferred Time Over
 PTO Public Telecommunication Operator
 PTO Programme Team Organisation
 PTOT Provisional take-off Time (IFPS)
 PTP Point to Point
 PTP Part-Task Practice
 PTR Profile Tuning Restriction (Management)
 PTRMC Prototype Team Resource Management Courseware
 PTS PoinTS (route points)
 PTS special reporting PoinTS, civil & military
 PTS Peripheral Transaction Server
 PTS Polar Track Structure
 PTS Poems Test Set
 PTS Pre-Training Screen (US)
 PTS Planned Traffic Store
 PTSD Post Traumatic Stress Disorder
 PTT Part-Task Trainer
 PTT Part Task Trainer
 PTT Push to Talk
 PTT Post, Telephone and Telegraph (BE new Belgacom). Push-To-Talk
 PTT Post, Telecommunications and Telegraphs
 PTT1 the ops room PTT1 line printer
 PTT2 the ops room PTT2 line printer
 PTW Project Team Work
 PTWMG Part-time work on medical grounds
 PU Physical Unit
 PU Processing Unit
 PUA PUblic Address system
 PUB Publications and Charts (AIS-TF)
 PUB ADD PUBlic ADDress / paging system
 PUE Power Utilisation Effectiveness
 Page 329
 EUROCONTROL AIRIAL
 Acronym Full form
 PUG PENS User Group
 PULSAR PULSating stAR
 PUMA Performance Usability-Modelling of ATM
 PV Present Value
 PV Performance Verification
 PVASI Pulsating Visual Approach Slope Indicator
 PVC Permanent Virtual Circuit
 PVC Poly-Vinyl Chloride
 PVD Plan View Display
 PVPL Predicted Vertical Protection Levels
 PVS Projection Video System
 PVT Position, Velocity and Time
 PVT GNSS Position Velocity Time
 PWA PFSB Working session on Actuarial assumptions
 PWG Pensions Working Group
 PWM Pulse Width Modulation
 PWM Pre-Warning Message Window (N-FDPS)
 PWO Pre-Warning message Oat
 PWP Pilot Working Position (Used in MUAC Simulator)
 PWP Physical Working Position
 PWP Published Way Point
 PWR PoWeR
 PWS Pair Wise Separation(s)
 PWS PoWer Supply
 PWS Predictive Wind Shear
 PYM Payment Milestone
 PZ Portotroz (SI)
 PZ 90 Parameters of Earth 1990
 PÄD Problemmeldungs- und Änderungsdienst (non-conformance reporting & change system)
 Q Atmospheric Pressure
 Q Quadrature Component (MTI)
 Q&A Question and Answer
 Q.23 Signalling system for PABX
 Page 330
 EUROCONTROL AIRIAL
 Acronym Full form
 Q.920 ITU-T recommendation: Digital Subscriber Signalling System No.1 (DSS) ISDN User-Network Data Link
 specification
 Q.921 ITU-T recommendation: Digital Subscriber Signalling System No 1 (DSS1) - ISDN user - network data link
 layer - specification
 Q.931 ITU-T recommendation: ISDN user-network interface layer 3 specification for basic call control
 Q.932 ITU-T recommendation: Digital subscriber signalling system No. 1 - Generic procedures for the control of
 ISDN supplementary services
 Q.SIG ATS-Q.SIG - standard for ATC. G/G voice communications
 Q1O kio private Queue
 Q23 ITU-T standard
 Q2O oio private Queue
 Q3O lio private Queue
 Q4O rio private Queue
 Q5O dio private Queue
 Q6O sio private Queue
 Q7O not allocated private Queue
 Q8O transferred chg and cnl
 QA Qdm Area
 QA Quality Assurance
 QA Quality Assurance Section (Section « Assurance qualité »)
 QA Quality Assurance
 QAD AeroDromes store, (Static Data Bank)
 QAM Quadrature Amplitude Modulation
 QAM QA Manager
 QAP Quality Assurance Plan
 QAPT Aircraft Performance Table, (Static Data Bank)
 QAR Quick-Access Recorder
 QAR Quality Assurance Representative (DECADE)
 QATL Aircraft Type List, (Static Data Bank)
 QBE Query By Example
 QBI compulsory ifr flight
 QC Quality Control (DECADE)
 QC Common Queue
 QCAA Qatar Civil Aviation Authority
 QCM Quality Control Manager
 Page 331
 EUROCONTROL AIRIAL
 Acronym Full form
 QDIR Queue DIRectory
 QDM Magnetic Heading (ICAO)
 QDM Magnetic heading (Zero wind)
 QDR Magnetic Bearing (ICAO)
 QDR magnetic beaRing
 QDR Reciprocal of qdm
 QF Quality Factor
 QFE Atmospheric pressure at aerodrome elevation (or at runway threshold).
 QFF Barometric pressure reduced to mean sea level
 QFP Quad Flat Pack
 QFU Runway in use
 QFU magnetic orientation of runway
 QGG Gat fdg General Queue
 QHN Altimeter Sub-scale setting (RLD paper)
 QIA Queue Identification Area
 QIC Quarter-Inch Compatibility
 QinetiQ Formerly known as the UK 'Defence Evaluation and Research Agency' (DERA)
 QIP Quality Improvement Plan
 QISAM Queued Indexed Sequential Access Method
 QIT Quarter-Inch Tape
 QLIN table of valid flight Levels
 QM Quality Management or Quality Manager
 QMF Query Management Facility
 QMG oat fdg General Queue
 QMP Question Mark Perception
 QMS Quality Management Support (Group)
 QMS Military Supervisor Queue
 QMS Quality Management System
 QMU outside air temperature (= OAT)
 QMWG Quality Management Working Group
 QNE Standard Pressure Setting (1013 mb/29.92inch)
 QNH Atmospheric Pressure at Nautical Height ; Q-code designation for atmospheric pressure at mean sea level
 QO Obsolete Queue
 QOS Quality of Service
 Page 332
 EUROCONTROL AIRIAL
 Acronym Full form
 QOTS Quantum-Optical Tracking Stations
 QP Quality Plan (MAS/DFS - ODS)
 QPF Quadra Potential Focus
 QPSK Quaternary Phase Shift Keying
 QPSK Quadrature Phase Shift Keying
 QQ Question
 QRA Quick Reaction Alert
 QRA Who Are You
 QRH Quick Reference Handbook
 QRLA Rout Link Aerodrome, (Static Data Bank)
 QRPS Route Points Store (Static Data Bank)
 QRSS Route Segments Store, (Static Data Bank)
 QSAM Quadrature Side-band Amplitude Modulation
 QSAM Queued Sequential Access Method
 QSIG Q-Reference Point Signalling (PSS1)
 QSIG-BC QSIG-Basic Call
 QSIG-GF QSIG-General Functional
 QSMS Quality and Safety Management System
 QSP gat Sup Private Queue
 QTA Quality, Technology and Architecture
 QTA Cancellation of Flight Message
 QTA Cancel decision (CRCO claims)
 QTAM Queued Telecommunications Access Method
 QTC Quick Transit Centre (Airports)
 QTE True bearing (ICAO)
 QTG Qualification Test Guide
 QUAD QUADrant
 QUASAR QUASi StellAR, (Source of radio emanations)
 QUASAR Questionnaire for ATSEP Standard Assessment Routines
 QuestionAIR Computer-based ATM questions bank
 QUIS Questionnaire for User Interface Satisfaction
 QUJ reciprocal of qte
 QUPID Quick-reaction Perimeter Intrusion Detection
 QVZON Video ZONe = maps for UIRs and sectors, (Static Data Bank)
 Page 333
 EUROCONTROL AIRIAL
 Acronym Full form
 QWERTY arrangement of keys on keyboard for English style
 QWERTZ arrangement of keys on keyboard for German style
 QZSS Quasi Zenith Satellite System
 R Report
 R Restricted Area
 R Red
 r Rate of change (Climb / Descend)
 R Romania
 R En-Route
 r Rate of change (climb or descent)
 R Right (runway ID)
 R Team Collection of air navigation charges under bilateral agreements with non-Contracting States
 R Right (N-FDPS)
 R&D Research and Development
 R&R officer
 (Responsable R&R)
 Rules and regulations officer
 R+B Range and Bearing line
 R-ATSU Receiving ATS Unit
 R-Channel Random Access Channel
 R-OMC Rfs-Operational Monitoring and Control position
 R-VKL Radar (executive-) controller
 R... prefix to a Restricted area identifier
 R/F Radio / Frequency
 R/T Radio/Telephony
 R/T Radio Telephony
 R/T Receiver/Transmitter
 R/T MS RadioTelephone Monitoring System
 R/W Runway
 R2 Signalling system used for telephone exchanges
 R2 European signalling standard (Voice communication)
 R2 EUROCONTROL Signalling Protocol
 RA Radio Astronomy
 RA Random Access
 RA Routeing Scheme Area (no longer in use)
 Page 334
 EUROCONTROL AIRIAL
 Acronym Full form
 RA Registration Authority
 RA Radio Access
 RA RAin
 RA Routine Area
 RA Risk Analysis (TCAS)
 RA Resolution Advisory (ACAS) (Avis de résolution)
 RAA Regional Airline Association
 RaADS Radar and ADS Display System
 RAAF Royal Australian Air Force
 RAAN Right Ascension of the Ascending Node
 RAARR Radar Arrival
 RAAS Regional Area Augmentation System
 RAAS Radar à synthèse d'ouverture (FR) / Synthetic-Aperture Radar (=SAR)
 RAC Resolution Advisory Complement
 RAC Rules of the Air and Air Traffic Services (ICAO)
 RAC Ruhr Assistant Controller
 RAC Rules of the Air & air traffic services
 RAC Rules of the Air and Air Traffic Control
 RACE Runway Capacity Enhancement
 RACF Resource Access Control Facility
 RACGAT Russian-American Air Traffic Coordination Group
 RACI Responsible, Accountable, Consulted, Informed
 RAD Route Availability Document
 RAD Requirements Application Document
 RAD RADAR Point (ENV entity type, used in all CHMI)
 RAD Radar
 RADA Regional ATM Development Area
 RADA Regional ATM Development Area
 RADA Regional Air Navigation Services Development Association
 RADAC Radar Verification Equipment in Norway
 RADALT Radio Altimeter
 RADAR Results Approach Deployment Assessment and Review (EFQM)
 RADAR Radio Detecting and Ranging
 RADCOOR Route Availability Document Coordinator
 Page 335
 EUROCONTROL AIRIAL
 Acronym Full form
 RADEP Radar Departure
 RADES RAdar Data Evaluation System
 RADIN RADar INterface card (RBP)
 RADIN Radar Data Interchange Network
 RAdio Radio
 RADLS Range Applications Data Link System
 RADNET RADar NETwork, (for interchange of radar data in Benelux and Germany
 RADVIEW Radar Verification Equipment in Norway
 RAE Royal Aerospace Establishment
 RAeS Royal Aeronautical Society (UK)
 RAeS-HFG Royal Aeronautical Society Human Factors (Group)
 RAF Reference ATN Facility (US/EUROCONTROL common project for development of the CAERAF)
 RAF Royal Air Force
 RAFC Regional Area Forecast Centre
 RAFT Radio Frequency Function group
 RAG Runway Arresting Gear
 RAG Range-Azimuth Gate Generator
 RAG Requirements Assessment Group
 RAG Regulatory Advisory Group (EASA)
 RAG RAGged
 RAI Runway Alignment Indicator
 RAI Italian Aeronautical Certification Authority
 RAID Redundant Array of Inexpensive Disks
 RAIDS Real-Time ATFM Interactive Demonstrator/Simulator
 RAIL Runway Alignment Indicator Lights
 RAIM Receiver Autonomous Integrity Monitoring
 RAIS RNDSG Airspace Improvement Synopsis
 RAISG RNAV Approach Implementation Support Group
 RAL Remote Analogue Loop
 RALT Radio Altimeter
 RAM Rapid Air Mobility (mobilité aérienne pour intervention rapide)
 RAM Random Access Memory
 RAM Route Adherence Monitoring
 RAM Reliability, Availability and Maintainability
 Page 336
 EUROCONTROL AIRIAL
 Acronym Full form
 RAM Responsability Assignments Matrix
 RAM Research Area Manager (Gestionnaire des domaines de recherche)
 RAM Rapid Alert Messaging
 RAMBO Reliable, Available, Maintainable, Benefits, Objectives
 RAMCC Regional Air Movement Control Centre
 RAMS Reorganised ATC Mathematical (Model) Simulator (EEC)
 RAN Regional Air Navigation (Meeting, ICAO)
 RANSU Regional Air Navigation Service Unit (DFS)
 RAOC Regional Air Operation Centre
 RAP Required Aircraft Performance
 RAP Recognised Air Picture
 RAP Runway Access Point
 RAP Resource Allocation Process
 RAP Referred Activate Proposal message
 RAPCON Radar Approach Control Facility
 RAPID Recognised Picture Identification Distribution
 RAPID RAPID(ly)
 RAPNET Regional ATS Packet-switched Network
 RAPPI Radar Access Plan Position
 RAPS Radar Analysis, Playback & Simulation System for Surveillance Data
 RAR Restricted Area Requested
 RAR Risk Analysis Report
 RARAD Radar Advisory
 RARP Reverse Address Resolution Protocol
 RAS Rectified Air Speed
 RAS Resource Allocation System
 RASA Requirements, Analysis, Strategy and Architecture (advisory group of Surveillance Team)
 RASA-SG Requirements Analysis Strategy and Architecture Sub-Group
 RASC Regional AIS System Centre (outside the ICAO EUR region); Regional AIS Service Centre (EAD)
 RASCAL RAdar Sharing CALculation
 RASG Regional Aviation Safety Group
 RASH RAin SHowers
 RASIF Radar Simulator Flugsicherung
 RASN RAin and SNow
 Page 337
 EUROCONTROL AIRIAL
 Acronym Full form
 RASP Radar Application Specialist Panel (MTPA / SSR)
 RASP Radar Surface Picture
 RASP Regional ATC Service Provision/ Fourniture de services ATC régionaux
 RASS Radar Analysis Support System
 RASS-A RASS - Airborne
 RASS-C Radar Analysis Support System - Centre Level
 RASS-P Radar Analysis Support System - Plot data
 RASS-PDP RASS - Polar Diagram Measurement Facility
 RASS-T Radar Analysis Support System - Track data
 RASS-T RASS for Tracks, (& ARTAS)
 RASS-V RASS for individual radar sites data
 RASSP Radar Analysis Support System - Plot
 RASTA Radar Statistics
 RASV Responsibility Air Space Volume
 RAT Risk Assessment Tool
 RAT Risk Analysis Tool
 RATE Remote Air Traffic Services Terminal
 RATS Radar Analysis and Test System
 RATT Radio Teletype
 RB Router Bridge (Hardware)
 Rb Rubidium
 RB Reserved Bandwidth
 RBD Reliablility Block Diagram
 RBI Radar Blip Identification
 RBL Range Bearing Line
 RBMT Reference Business/Mission Trajectory
 RBP Radar Bypass Processor (MAS UAC)
 RBR Router Bridge
 RBS Radio (Telephony) Backup System
 RBS Radar Bypass System
 RBT Reference Business Trajectory
 RBTA Authorised Part of a Reference Business Trajectory
 RBTP Planned Part of a Reference Business Trajectory
 RBTX Executed Part of a Reference Business Trajectory
 Page 338
 EUROCONTROL AIRIAL
 Acronym Full form
 RC Roll-Call
 RC Reply Control
 RC Radar Control
 RC Reply Control (bits)
 RC Radar Controller
 RC Reset Cause
 RC 12C Radio Callsign - Callsign
 RC 12R Radio Callsign - Radio
 RCA Remote Client Application
 RCA Remote Client Access
 RCA Reduced Coordination Airspace
 RCA Revised Contribution Assessment
 RCA Reach(ing) Cruising Altitude
 RCAT Route Catalogue
 RCB Release Control Board
 RCC Ruhr Coordinating Controller
 RCC Route Charges Committee (Comité pour les redevances de route)
 RCC Rail Control Centre
 RCC Rescue Coordination Centre (ENV data entity unit subtype)
 RCC Remote Client Configuration
 RCCB Residual Current Circuit Breaker
 RCD DCL Request (CPDLC)
 RCD DCL Request Message
 RCDB Reference Code Data Base
 RCDM Release Content Definition Meeting
 RCDS Radio Channel Distribution and Switching
 RCDSS Radar Control and Display Subsystem
 RCE Radio Control Equipment
 RCF Radio Communications Failure (message type designator)
 RCF Remote Communications Facility
 RCFEP Radar(Data) Communications Front-End Processor (RADNET)
 RCGSP Review of the General Concept for Separating Panel (ICAO)
 RCH ReaCH(ing)
 RCHG, RCNL Possible Titles of an ADEXP RFPM
 Page 339
 EUROCONTROL AIRIAL
 Acronym Full form
 RCL Reversal Climb
 RCL Runway Centre Line
 RCL Executive (i.e. Radar) Controller
 RCLL Runway Centre Line Lights
 RCM Radar Controller Message (Mil. ECM)
 RCM Radar Coordinator (Controller) Message (Mil. ECM)
 RCM Statement of Basic Operation Requirement, Planning Criteria & Methods of Application (ICAO/AIS)
 RCMS Remote Control & Monitoring System
 RCNL Reason(s) for cancellation
 RCO Reduce Cumulative Overloads
 RCO Remote Communications Outlet
 RCO Route Charges Office (service des redevances de route)
 RCOWG Route Charges Offices' Working Group (groupe de travail des services nationaux des redevances de route)
 RCP Required Communication(s) Performance
 RCP right-circular polarisation
 RCR Runway Condition Reading
 RCR Raw Collision Risk
 RCR Rescue Coordination Region
 RCRT Refresh Cycle Response Time
 RCS Radar Cross Section
 RCS Reply Control Subfield
 RCS Remote Control System
 RCS Risk Classification Scheme
 RCS Radar Cross Section
 RCS Risk Context Statement (ICAO)
 RCT ReCTifier
 RCT Route Catalogue system
 RD Regulated Demand
 RD Request Disconnection
 RD Routine Domain
 RD Redirect
 RD Risk Display (ODID)
 RD-Channel Random Data Channel
 RDAF Royal Danish Air Force
 Page 340
 EUROCONTROL AIRIAL
 Acronym Full form
 RDBMS Relational Database Management System
 RDC Routing Domain Confederation
 RDC Reversal Descent
 RDCom FAA/EUROCONTROL R&D Committee
 RDCU Radar Data Compressor Unit
 RDD Raw Data Display
 RDE Radar Data Equipment
 RDE-FG Radar Data Exchange Focus Group
 RDF Radio Direction Finding
 RDF Routine Domain Format
 RDFS Radio Direction Finder System
 RDG Radar Data Generator
 RDI Routing Domain Identifier
 RDIF Radar Data Interchange Format
 RDL RaDiaL (VOR)
 RDLY Reason(s) for delay
 RDM Running Display Message
 RDN Relative Distinguished Name
 RDO RaDiO
 RDP Radar Data Processor
 RDP Remote Data Processing
 RDP Runway Datum Point
 RDP Radar Data Processing
 RDP (NM) Releases Deployment Plan
 RDPC Radar Data Processing Chain
 RDPP Radar Data Post Processor
 RDPS Radar Data Processing System (now SDPS)
 RDQC Radar Data Quality Control
 RDR Radar
 RDR Radar Data Recording
 RDR.HDV Radar Handover (N-FDPS)
 RDSS Radar Determination Satellite System
 RDSS Radar Data Survival System
 RDTE Research, Development, Trials and Evaluation
 Page 341
 EUROCONTROL AIRIAL
 Acronym Full form
 RDY Ready Message (old name for REA)
 RDY Ready for take-off message (Message "prêt au départ")
 RE Real Equipment
 RE Recall
 RE Reserved Expansion Indicator
 REA Ready to depart message
 REA Ready Message
 REACT4C Reducing Emissions from Aviation by Changing Trajectories for the benefit of Climate
 Real Real time
 REC Ruhr Executive Controller
 REC Recall (ICAO) / RECording
 REC Recommendation
 REC RECeive(r)
 REC Request EOBT Change
 REC RECord(ing)
 RECAT Re-categorisation of Wake Turbulence Separation Minima (recatégorisation des minimums de séparation liés
 aux turbulences de sillage)
 RECAT-EU European separation standard for aircraft wake turbulence
 RECCL RECording CLass
 RecDPS Recording Data Processing System (PALLAS System)
 RED Random Early Detection
 REDAN Red de Datos de Navegación Aérea de Aena (Spanish CAA Data Network)
 REDES Route efficiency in approaching destination
 REDL Runway EDge Lights
 REDZ REcent DriZzle
 REF REFer(ence) to ...
 REFGHMI Reference Ground Human Machine Interface
 REFPM Repetitive Extended FPM
 REFZRA REcent FreeZing RAin
 REG Aircraft registration marking (Flight plan item 18 indicator)
 REG Region
 REG Regulators
 REG REGistration
 REG Registration Number
 Page 342
 EUROCONTROL AIRIAL
 Acronym Full form
 REG Regulation
 REGCAUSE Regulation cause
 REGR REcent hail
 REGUL Regulation
 REIL Runway End Identifier Lights
 REJ Receive Reject
 REJ REJect message (IFPS)
 REJCTOT Rejected Calculated Take-off Time
 REJTOT Rejected Take-off Time
 REL Release
 REL RELay
 REL aircraft is RELeased
 RELP Residual Error Linear Prediction
 REM Röntgen (or Roentgen) Equivalent Man
 REM Radio Emergency Module
 REM Rapid Eye Movement
 Rem De-icing Remote de-icing procedure
 REMOCO Remote Control (Supervision System)
 REMP Radar Replacement and Modernisation Programme
 REMP Radar Exchange and Modernisation Programme
 REN Re-ENtrant (flight)
 REN Re - ENtry
 RENAR Réseau de la Navigation Aérienne (FR network)
 RENL Runway ENd Lights
 REP Field Repetition Indicator
 REP REPetition indicator
 REP REPort(ing), REporting Point
 REP Report
 REP Radar Emergency Processing
 REPC Right hand Enhanced Planning Console
 REPF Regulations of the EUROCONTROL Pension Fund (Règlement du Fonds de pension EUROCONTROL)
 REQ REQuest message
 RER Residual Error Rate
 RER Rerouting
 Page 343
 EUROCONTROL AIRIAL
 Acronym Full form
 RERA REcent RAin
 RERASN REcent RAin and SNow
 RERTE RE-RouTE
 RES Radar Environment System
 RES Radar Environment Simulator
 RESA Runway End Safety Area (ICAO)
 RESET Reducing Separation Standards
 RESH REcent rain SHowers
 RESN REcent SNow
 RESNSH REcent SNow Showers
 RESP Response (ICAO)
 RESPBY Respond by (time to give a response)
 REST 1 Runway in use, Equipment, Situation, Traffic
 REST 2 Restrictions, Equipment, Situation, Traffic
 RESTQ Recovery Stress Questionnaire
 RESTR Route efficiency in straightness of trajectory
 RET Airborne & ground retrofit (issues)
 RET Revised EOBT
 RET Rapid Exit Taxiway
 RET RETain the pssr for allocation to the next identical c/s
 RETD Revised Estimated Time of Departure
 RETEX Return of Experience
 RETINA Resilient Synthetic Vision for Advanced Control Tower Air Navigation Service Provision
 RETS REcent ThunderStorms
 RETX Retransmission or Cross-Coupling
 REV REVision (Message Type Designator)
 REX Tail clear
 RF Radius to a Fix (ARINC 424 Path Terminator)
 RF Radio Frequency
 RF, RFL Requested Flight Level (Niveau de vol demandé)
 RFA Radar Field Analyser
 RfC Request For Change
 RfC Request For Connection
 RFC Radar Fallback Communication System
 Page 344
 EUROCONTROL AIRIAL
 Acronym Full form
 RFC Radar Front-end Communications unit (ARTAS)
 RFC Request for Comments
 RFC Request for Comment
 RFC Radio Facility Chart
 RFCA Panel on Route Facility, Cost Accounting and Cost Allocation (ICAO)
 RFCP Route Facility Costs Panel (ICAO)
 RFEP Radar Front End Processor
 RFF Radar Fall-back Facility
 RFF Radio Frequency Function
 RFFS Rescue and Fire Fighting Services
 RFG Requirements Focus Group
 RFG Radio Frequency Generator
 RFI Radio-Frequency Interference
 RFI Request for (direct) improvement message
 RFI Request For Information
 RFID Radio Frequency Identification
 RFL Requested Flight Level
 RFLT Radio Frequency Unit
 RFM Remote Field Monitor
 RFP Replacement Flight Plan (Procedure)
 RFP Replacement Flight Plan (IFPS)
 RFP Request For Proposal
 RFP Reference Point (ENV entity type, used in all CHMI)
 RFP Repetitive Flight Plan
 RFPD Repetitive Flight Plan Data
 RFPM Repetitive Flight Plan Message
 RFPS Radar data Front Processing System (PALLAS system)
 RFQ Request for Quotation
 RFS Requirements and Features Specification
 RFS Remote File Server
 RFS Radar Fallback System
 RFS Random Field Sequencing (ASTERIX)
 RFS Random Field Sequencing organisation
 RFSG Regulatory Functions Study Group / Groupe d'étude sur la fonction de réglementation
 Page 345
 EUROCONTROL AIRIAL
 Acronym Full form
 RFT Radio Telephony
 RFT Request For Tender
 RFT Revisable Form Text
 RFU Radio Frequency Unit
 RFZ Restricted Flying Zone
 RG RanGe (lights)
 RG Review Group
 RG Regulation (see also Regul)
 RGB Red, Green, Blue
 RGCSP Review of the General Concept of Separation Panel (ICAO)
 RGGI Regional Greenhouse Gas Initiative
 RGI Radar Gyroscope & Inclinometer
 RGIC Ranging Geostationary Integrity Channel
 RGS Regional Ground Station
 RGS Remote Ground Stations
 RGS Remote Ground Station
 RH Radar Head
 RHC Ruhr High Coordinator controller
 RHCP Right Hand Circular Polarisation
 RHD Radio (or Radar) Horizon Distance
 RHE Ruhr High Executive controller
 RHEA Role of the Human in the Evolution of Air Traffic Management systems
 RHEL Red Hat Enterprise Linux
 RHI Range / Height Indicator
 RHP Radar Head Processor
 RHR RAD Harmonisation Rules
 RI Radar Information
 RI Route Intercept
 RI Reliability Indicator
 RI Routing Information
 RI Ring-In (connection)
 RIA Rich Internet Application
 RIA Regulatory Impact Assessment (Évaluation des incidences de la réglementation)
 RIANNA Research into Improving Aircraft Noise Nuisance Assessment
 Page 346
 EUROCONTROL AIRIAL
 Acronym Full form
 RIAS Airport Situational Awareness and Runway Incursion Alert System
 RIB Routing Information Base
 RIC Radar Integration Control
 RICBAN Regulatory and Information Board Area Northwest
 RICE RTF Interface Control Equipment
 RID Review Item Disposition; Review Item Discrepancy (EAD)
 RIF Reclearance In Flight
 RIFF Resource Interchange File Format
 RIG Regional Implementation Group
 RIM Runway Incursion Monitoring
 RIMCAS Runway Incursion Monitoring and Conflict Alert System
 RIMS Ranging and Integrity Monitoring Station (GNSS-1/EGNOS)
 RINAL Portuguese Data Network
 RIO Risks, Issues and Opportunities
 RIO Ruhr Input Operator
 RIOT Ram I/O interval Timer
 RIP Routing Information Protocol
 RIPE Reseaux IP Européens (European IP Network authority)
 RIPE Required Information Performance Concept
 RIRP Runway Incursion Reduction Program
 RIRT Russian Institute of Radio Navigation and Time (St. Petersburg)
 RIS Relational Interface System
 RIS Route Implementation Summary
 RISC Reduced Instruction Set Computer
 RISC Recommendations from Incidents and Safety Concerns
 RISE Retrieval and Interchange of Standards in Europe
 RISO Riso National Laboratory (Denmark)
 RISP Radar System Improvement Programme
 RIT RADNET/RMCDE Implementation Team
 RITA Replay Interface for TCAS Alerts
 RITA Réseau Intégré de Transmissions Automatiques (FR)
 RJ ReJect (TPDU)
 RJC Airspace Crossing Reject Message (Airspace Crossing Dialogue)
 RJC Reject Message
 Page 347
 EUROCONTROL AIRIAL
 Acronym Full form
 RJC ReJect Coordination message
 RJE Remote Job Entry
 RJEF Remote Job Entry Function
 RJT Rerouteing Rejection message
 RL Reference Location
 RL Reverse Link
 RL Report Leaving
 RLA ReLAy to
 RLB RoLling Ball
 RLB/CS RoLling Ball/CallSign (Input combination)
 RLBCS Rolling Ball CallSign (input)
 RLCE Request flight Level Change En-route
 RLD Rijksluchtvaartdienst (Civil Aviation Department (Netherlands)) (Service de l'aviation civile (Pays-Bas))
 RLE Run Length Encoding (bit mapping algorithm)
 RLG Ring Laser Gyroscope
 RLIM Radar Line Interface Module
 RLL Run Length Limited (HDC/HDD)
 RLLS Runway Lead-in Lighting System
 RLP Remote Line Printer
 RLS Reliable Link Service
 RLS (Flight) RuLeS
 RLSD Released (US)
 RLSM Reduced Lateral Separation Minimum
 RLST Revised List (for RPLs)
 RLT Start of take-off roll
 RLW Regie der LuchtWegen (BE), Belgium Aviation Authority: old name, now BELGOCONTROL
 RLW Remote Line Watch
 RM-ODP Reference Model of Open Distributed Processing
 RMA Reliability, Maintainability, Availability
 RMA Reliability Maintainability Availability
 RMA Regional Monitoring Agency (Agence de surveillance régionale)
 RMAP RMA Plan
 RMB Resources Management Board
 RMCD Remote Master Control Desk
 Page 348
 EUROCONTROL AIRIAL
 Acronym Full form
 RMCDE Radar Message Conversion and Distribution Equipment (Convertisseur-répartiteur de messages radar)
 RMCDS Radar Message Conversion and Distribution System
 RMCS Remote Monitoring and Control System
 RMG RAD Management Group, RAD = Route Availability Document
 RMI Radio Magnetic Indicator
 RMI Remote Maintenance Interface
 RMK ReMarK(s)
 RMK Remark (Flight plan item 18 indicator)
 RMLS Remote Monitoring and Logging System (U.S.)
 RMM Remote Maintenance Monitoring
 RMOD Receiving MODule no. on the mc-side
 RMON Remote Monitor, Remote Monitoring
 RMonMIB Remote MONitoring Management Information Base
 RMP Required Monitoring Performance
 RMP Radio Management Panel
 RMP Risk Management Plan
 RMPS Radar Message Processing System
 RMR Roke Manor Research
 RMS Root Mean Square
 RMS Error Root Mean Square error.
 RMScv See RMSk (infinite)
 RMSpv RMS peak value.
 RMT Rule Making Task
 RMT Reference Mission Trajectory
 RMX Replacement subMultipleXer
 RMZ Radio Mandatory Zone
 RN Reference Number
 RNAV Area Navigation (navigation de surface)
 RNAV Radio Navigation
 RNC Radio Navigation Chart (ICAO)
 RNC Required Navigation Capability
 RNDSG Route Network Development Sub-Group (Sous-groupe " Développement du réseau de routes ATS")
 RNE Rapid Net Entry
 RNG RaNGe marker
 Page 349
 EUROCONTROL AIRIAL
 Acronym Full form
 RNIS Réseau National à Intégration de Services (FR)
 RNLAF Royal Netherlands Air Force
 RNP Required Navigation Performance
 RNP-(X) Required Navigation Performance (minimum to be defined)
 RNP-AIRNAV Required Navigation Performance - Area Navigation
 RNP1 Required Navigation Performance (1nm minimum performance)
 RNP5 Required Navigation Performance (5nm minimum performance)
 RNPC Required Navigation Performance Capability
 RNPSORSG Required Navigation Performance Special Operational Requirements Study Group (ICAO)
 RNPTF Required Navigation Performance Task Force
 RNR Reference NumbeR (PHAROS)
 RNR Receive Not Ready
 RNR Royal Naval Reserve
 RNSS Radio Navigation Satellite System
 RO Read-Only
 RO Router Function
 RO Romania
 RO RPL Office
 RO Ring-Out (connection)
 ROAD Representation of Overall ATM Development
 ROBIN Road billing network
 ROC Rate of Climb
 ROC/D Rate of Climb/Descent
 ROD Rate of Descent
 ROE reference operating environment
 ROF Request on Frequency (Message)
 ROFA Runway Object Free Area
 ROFOR ROute FORecast (in aeronautical meteorological code)
 ROI Return on Investment
 ROL Request On-Line
 ROLC Routing Over Large Clouds
 Role Role-play
 ROM Read-Only Memory
 ROMATSA Romanian Air Traffic Services Administration
 Page 350
 EUROCONTROL AIRIAL
 Acronym Full form
 ROMBUL Romania, Bulgaria
 ROMBULPO Romania, Bulgaria, Poland (Roumanie, Bulgarie et Pologne)
 RON Receiving ONly
 RoP Rules of Procedure (règlement intérieur)
 ROPA RAPNET Operational Planning Agreement
 ROPA RAPNET Operations and Planning Agreement
 ROR Range Only Radar
 ROS Route Orientation Scheme
 ROSAS Regional Organisation of the Sequencing and Scheduling of Aircraft System
 ROSE Remote Operation Service Element
 ROSE Rational Object oriented Software Engeneering
 ROT Remotely Operated Tower
 ROT Runway Occupancy Time
 ROTA Runway Occupancy Time for Arrivals
 ROTD Runway Occupancy Time for Departures
 Route1 ats ROUTEs and reporting points dcp designator
 Route2 weekend ROUTEs and reporting points dcp designator
 ROZ Restricted Operations Zone
 RP Routing Protocol
 RP Reporting Point
 RP Radar Post
 RP reference period (SESAR)
 RP Route Point
 RP2 Reference Period 2 (SESAR - 2015-2019)
 RPA Remotely Piloted Aircraft
 RPAS Remotely Piloted Aircraft Systems
 RPBT Relative Processor Busy Time
 RPC Remote Procedure Call
 RPC Regional Planning Criteria
 RPDS Reference Path Data Selector
 RPE-LTP Regular Pulse Excited long-term Prediction
 RPEPTS selected Reporting PoinTS from flight plan route
 RPF Rapid Prototyping Facility
 RPG Report Programme Generator
 Page 351
 EUROCONTROL AIRIAL
 Acronym Full form
 RPI Radar Position Indication
 RPIs Radar Position IndicatorS
 RPK Revenue Passenger Kilometre
 RPL Repetitive Flight Plan / Plan de vol répétitif
 RPLC RePLaCe(d)
 RPM Resource and Partnership Management// Unité "Gestion des ressources et du partenariat" (DF)
 RPM Revenue Passenger Miles
 RPM Revolutions Per Minute
 RPOA Recognised Private Operating Agency
 RPQ Request for Price Quotation
 RPR RePRint message
 RPS Revolutions Per Second
 RPS Regulated Power Supply
 RPS Real-time Programming System
 RPS Radar Position Symbol
 RPS Risques psychosociaux (psychosocial risks - PSR)
 RPS Recording and Playback System
 RPT Regular proficiency Training
 RPU Radar Processing Unit
 RPV Remotely Piloted Vehicle
 RPVD Radar Plan View Display
 RPWO Repetitive Flight Plan Workstation Operator
 RPY Replay
 RQ ReQuest (Indication of)
 RQI ReQuest for Initialisation
 RQL Request NOTAM List
 RQM Radar Quality Monitoring
 RQMNTS ReQuireMeNTS
 RQN Request NOTAM
 RQO Request for Original
 RQP ReQuest flight Plan (message type designator)
 RQS ReQuest Supplementary flight plan (message type designator)
 RQT ReQuesTing
 RR Report Reaching
 Page 352
 EUROCONTROL AIRIAL
 Acronym Full form
 RR Reply Request (control bits)
 RR Radio Resource
 RR Routeing Scheme Route (no longer in use)
 RR Receive Ready
 RRA Radar Recording Analysis
 RRA Rerouteing Acceptance Message
 RRC Recording Replay Computer (ODS)
 RRCS Remote Radio Communication System
 RREC Repetitive Flight Plan Recovery Message (IFPS)
 RRI Reference Router Implementation
 RRI Router Reference Implementation
 RRN Rerouteing Notification Message
 RRP Remote Radar Post
 RRP Re-routing Proposal Message ((Message de) proposition de réacheminement)
 RRP Reduced Radar Plot
 RRR Radar Recorder (manufactured by COMSOFT)
 RRR Radar data Recording and Replay system (RADNET / application software COMSOFT)
 RRSS Regional Runway Safety Symposium
 RRTEREF Reroute Reference
 RRTES Reroutes
 RRU Remote Radio Unit
 RRV Referred Revision Message (OLDI)
 RRV Referred ReVision message
 RS Radar Surveillance
 RS Record Separator
 RS Routeing Scheme
 RS Restrictions (generic concept comprising all kinds of restrictions applicable to air traffic)
 RS Radar System
 RS Reference Station
 RS NASC providing Regional Support (EAD)
 RS NATS Recruitment Services NATS
 RSA Radar Service Area
 RSA Russian Space Agency
 RSA Restricted Airspace
 Page 353
 EUROCONTROL AIRIAL
 Acronym Full form
 RSA Runway Safety Area
 RSAP Radnet Service Access Point
 RSAP Replenishment Spares Acquisition Program
 RSAP (RADNET) RMCDE Service Access Point
 RSAP Radar Source Access Point
 RSAP Runway Safety Action Plan
 RSC Rescue Sub-Centre
 RSC Route Catalogue Services Component
 RSCAD Civil Aviation Department of Republic of Srpska (Republic of Srpska, Bosnia and Herzegovina)
 RSCD Runway Surface ConDition
 RSCS Remote Spooling Communications Subsystem
 RSE responsabilité sociale des entreprises (Corporate Social Responsibility - CSR)
 RSFTA Réseau de Service Fixe des Télécommunications Automatiques
 RSG Research Study Group
 RSG Route Structure Group
 RSI US-based radar antenna manufacturer
 RSI Radiation Status Indicator
 RSL Raytheon Systems Limited
 RSLS Receiver Side-Lobe Suppression
 RSM Radar Service Message (RMCDE/ RADNET)
 RSM Radar S Mode
 RSMCC Random System Management Control Channel
 RSMCP Radar System Mosaic Centre Point
 RSMTF Radar Separation Minimum Task Force
 RSO Route per State Overflown
 RSO Reduced Spacing Operations
 RSO Regional Sub-Office (ICAO)
 RSOO Regional Safety Oversight Organization
 RSOQ Radar Stores Occupancy Query
 RSP Remote Status Panel
 RSP Required Surveillance Performance
 RSP ReSPonder beacon
 RSP Response
 RSPD Reported Speed
 Page 354
 EUROCONTROL AIRIAL
 Acronym Full form
 RSPL Recommended Spare Parts List
 RSR en-Route Surveillance Radar
 RSRE Royal Signals and Radar Establishment
 RSS Remote System Software section
 RSS Radar Sub-System
 RSS Recording Sub-System
 RSS Reservation Status Sub-field
 RSS ROOT Sum Squared
 RSS Radar Separation Standard
 RSSI Received Signal Strength Indication
 RSSP Radar Systems Specialist Panel
 RST Radar Skills Trainer
 RSTCA Redevance pour services terminaux de la circulation aérienne = Approach/Departure charges
 Rstd Restricted (Time-Restricted Learning)
 RSUP Replay SUPervisor
 RSUPG Rest picture Gat SUPervisor
 RSURTF RASS-S Upper Requirements TF
 RSUS Repetitive Flight Plan Suspend Message
 RSUS RPL Suspension Message
 RSVM Reduced Vertical Separation Minimum (Minimum réduit de séparation verticale)
 RSVP Resource Reservation Protocol (over IP)
 RSYD (Aircraft) Released Subject to Your Discretion
 RT Receive Transmit
 RT Route (ENV entity type, used in all CHMI)
 RT Route Table
 RT Real Time
 RT Radio Telecommunication
 RT Radio Telephony
 RT-VBR Real Time - Variable Bit Rate
 RT1 ats RouTes & reporting points (Including TACAN G1)
 RT1 RouTe 1 map
 RT2 weekend RouTes & reporting points + link RouTes
 RT2 RouTe 2 map
 RTA Required Time of Arrival (Heure requise d'arrivée)
 Page 355
 EUROCONTROL AIRIAL
 Acronym Full form
 RTA Remote TACT Access
 RTA Remote Terminal Access System (phased-out system, see CHMI)
 RTA Requested Time of Arrival
 RTAM Remote Teleprocessing Access Method
 RTB Radar Tool Box
 RTB R/T Backup equipment
 RTC Radio Transmission Control
 RTC (European) Regional Technical Conference
 RTC-DES Route extension due to airspace design
 RTCA Radio Technical Commission for Aeronautics (US)
 RTCC Real Time Channel Controller
 RTCE Regional Training Centre of Excellence (ICAO)
 RTCP Real Time Control Protocol
 RTCS Recruitment, Training, Competence and Selection
 RTD ReTarDed (meteo) message (Message type designator)
 RTD Research & Technological Development
 RTE Route
 RTE-FPL Route extension due to last filed flight plan
 RTE-T Réseau transeuropéen de Transport (FR)
 RTEPNT RouTE PoiNT
 RTEPTS Selected Reporting Point from flight plan RouTE
 RTF Radio Telephony
 RTF Requirements Task Force
 RTF Rich Text Format
 RTF Radiotelephone
 RTF SRC Requirements Task Force
 RTFM Regulated Tactical Flight Model (by ATFM Measures)
 RTG RadioTeleGraph(y)
 RTHL Runway ThresHold Lights
 RTI D-RVR Delivery Messge
 RTI Request Tactical Instructions message (OLDI)
 RTI RVR Transmit Information Message
 RTILS Runway Threshold Identification Lights
 RTK revenue tonne-kilometre
 Page 356
 EUROCONTROL AIRIAL
 Acronym Full form
 RTK Real-Time Kinematic
 RTL Route Table Length
 RTLS Return To Launch Site
 RTMDE RADNET Test Monitoring and Demonstration Equipment (colour screen)
 RTN ReTurN(ed)(ing)
 RTO Rejected Take-Off
 RTO Ready for take-off, Reduced Take-Off and Landing
 RTOS Real Time Operating System
 RTP Real Time Protocol
 RTP Radar Trigger Pulse
 RTPC Réseau Téléphonique Public Commuté / Public Switched Telephone Network (PSTN)
 RTPTS RouTe PoinTS
 RTQC Real Time Quality Control
 RTQC/A Real Time Quality Control / Assessment
 RTR RVR Transmit Request Message
 RTR Radar Termination Range
 RTR Remote Transmission / Receiver
 RTR Router
 RTR D-RVR Request Message
 RTS Return To Sender
 RTS Return to Service
 RTS Reliable Transport Service
 RTS madap Real Time System Software Section
 RTS Real Time Simulation
 RTS Request To Send
 RTSA Real-Time Status of Airspace
 RTSE Reliable Transfer Service Element
 RTSIM Real-Time Simulation
 RTSX Real Time Supervisor eXecutive (MADAP Operating System)
 RTT Radio TeleTypewriter
 RTT Round Trip Time
 RTT Regie van Telegraaf en Telefoon (Belgacom) (BE)
 RTT D-RVR Termination Message
 RTT Ready to Task
 Page 357
 EUROCONTROL AIRIAL
 Acronym Full form
 RTT RVR Transmit Termination Message
 RTTS Real Time Tactical Server
 RTV Real Time Video
 RTX Request To Send XID
 RTZL Runway Touchdown Zone Lights
 RU Regulatory Unit (Unité de réglementation) - EUROCONTROL
 RU Russian Federation (ISO Country Code)
 RU Routeing Scheme Unit (no longer in use)
 RUG RASS Users Group
 RUG RMCDE User Group
 RUI Remote User Interface
 RUI Radio Interface Unit
 RUP Rational Unified Process
 RUT standard Regional roUte Transmitting frequencies
 RV Rescue Vessel
 RVA Régie des Voies Aériennes (= RLW, B)
 RVA Régie des Voies Aériennes (B)
 RVI ReVerse Interrupt
 RVI Radar Video Interface
 RVP Rendezvous Point
 RVR Runway Visual Range
 RVS Reduced Vertical Separation
 RVSM Reduced Vertical Separation Minimum (minimum réduit de séparation verticale)(of 1000ft between FL290 and
 FL410 inclusive)
 RVSM Entry Point Reduced Vertical Separation Minimum Entry Point
 RVSM Exit Point Reduced Vertical Separation Minimum Exit Point
 RVV Runway Visual Value
 RWEWP Runway End Way-point
 RWIP Runway Intercept Point
 RWIS Roadway Weather Information System
 RWIWP Runway Intercept Way-point
 RWP EUROCONTROL Regulatory Work Programme (Programme de travail EUROCONTROL dans le domaine de
 la réglementation)
 RWSL Runway Status Lights
 RWY Runway
 Page 358
 EUROCONTROL AIRIAL
 Acronym Full form
 RWY WP Runway Waypoint
 RX Receive
 RX Receiver Station
 RX Receive(r), Reception (ADMAR)
 RY Route Assembly
 RZ Return to Zero
 s Second (unit of time)
 S Sweden
 S Select
 S Schedule cycle
 S Scheduled flight type
 S South, Southern latitude
 S (0) basic access interface at S ref. point 192 kbit/s.
 S (2) primary rate interface at S ref. point 2048 kbit/s
 S&M Sequencing & Merging
 S-band S-Band (radar frequency band)
 S-CAT Special Category 1 - Norwegian GBAS system
 S-Connect Session Connect Service
 S-Data Session Data Service
 S-ELS Mode-S Elementary Surveillance
 S-Gate Start Project Gate (DEVD)
 S-Give Session Give-Token Service
 S-P-R-c Stimuli, Processing, Response, controlled executive
 S-Please Session Please-Token Request Service
 S-Release Session Release Service
 S-SUP Sector Supervisor (MADAP)
 S-TDMA Self-Organising Time Division Multiple Access
 S. Select
 s.m. Statute Mile
 S/2 Symbol for Stochastic Probability of Reply of 50%
 S/ATM Secretary ATM Unit
 S/M Sequencing/Metering
 S/MIME Secure MIME
 S/N Signal to Noise (ratio)
 Page 359
 EUROCONTROL AIRIAL
 Acronym Full form
 S/T Space / Time
 S/T Short-Term
 S/W Software
 S0 Security Class 0
 S1 The future (desired) state
 SA Special Agreement
 SA Selective Availability
 SA Salivary Cortisol
 SA Selective Availability
 SA Structured Analysis
 SA Security Architecture
 SA Situational Awareness
 SA SAnd or dust storm, rising SAnd
 SA Sub-Address
 SA System Administrator
 SA Satellite
 SA Skill Acquisition
 SA Source Address
 SA Separation Assurance
 SA FG Surveillance Architecture Focus Group
 SA/BARS Situation Awareness Behaviourly Anchored Rating Scales
 SAA System Application Architecture
 SAA Special Activity Airspace
 SAAAR Special Aircrew Aircraft Authorisation Required (FAA terminology)
 SAAM System for Assignment and Analysis at a Macroscopic level
 SAAP Safety for ATM Procedures
 SAAP Substance Abuse Avoidance Procedure
 SaaS Software as a Service
 SAASM Selective Availability Anti Spoofing Module (GPS PPS)
 SABENA Société Anonyme Belge d'Exploitation de la Navigation Aérienne
 SABET Study of an ATC Baseline for the Evaluation of Team configurations
 SABM Set Asynchronous Balanced Mode
 SABME Set Asynchronous Balanced Mode Extended
 SAC Solling Assistant Controller
 Page 360
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 Acronym Full form
 SAC Source Area Code (ASTERIX)
 SAC Strategic Air Command
 SAC Sector Active list (Counter)
 SAC System Area Code
 SAC Surveillance Architecture Cell
 SAC System Assisted Coordination
 SAC Single Attached Concentrator
 SAC System Area Code
 SACADO SASS-C Advanced Development Office
 SACCAN Sistema ADS/CPDLC en Canarias
 SACEUR Supreme Allied Commander Europe
 SACHA Separation and Control Hiring Assessment (US)
 SACLANT Supreme Allied Commander Atlantic
 SACMAS SASS-C Development, Maintenance and Support
 SACMO SASS-C Management Office
 SACO Sequence Acknowledgement Communication Object
 SACON Slovak Aeronautical Communication Network
 SACSO SASS-C Support Office
 SACTA Sistema Automatizado de Control del Tráfico Aéreo (ES) / Spanish Automated ATC System / Semi-
 Automatisation de Contrôle du Trafic Aérien (FR)
 SAD Speech Activity Detection
 SAD System Architecture Document
 SADIS (Swedish) Satellite Distribution System
 SADIS Satellite Distribution of World Area Forecast System / ICAO Group
 SADT Structured Analysis and Design Technique
 SAE Society of Automotive Engineers
 SAEC Safety Assurance and Evidence Collection
 SAF System Attachment Feature
 SAF Safety (EATMP domain)
 SAF Safety
 SAF Sustainable Aviation Fuels
 SAF Safety - EEC business area
 SAF BD Safety Enhancement Business Division (EUROCONTROL - DAP Directorate)
 SAF-AOI (Safety) ATM Occurrence Investigation
 Page 361
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 Acronym Full form
 SAF-E2I Deatailed ESARR 2 Implementation Training Course
 SAF-E4I ESARR 4 Implementation Training
 SAF-NSA Safety - National Suprvisory Authority course
 SAF-SAAP Safety Assessment ATM Procedures
 SAF-SMG Safety Manager Course
 SAF-SOAM Systemic Occurrence Assessment Method training course
 SAFA Safety Assessment of Foreign Aircraft (Évaluation de la sécurité des aéronefs étrangers)
 SAFEE Security of Aircraft in the Future European Environment (Sécurité des aéronefs dans le futur environnement
 européen)
 SAFER Safety Analysis Function EUROCONTROL and associated Repository (Projet EUROCONTROL de fonction
 d'analyse de la sécurité et gisement connexe)
 SAFER Safety and Errors
 SAFG Safety Group
 SAFI Safety Monitoring for Indicators
 SAFIRE (Aeronautical) Spectrum and Frequency Information Resource
 SAFLEARN Safety Learning for R&D
 SAFMAC Safety Validation for Major Changes
 SAFMOD Safety Modelling
 SAFP Surveillance Avionics Functional Performance
 SAFREP Safety Data Reporting & Data Flow (Notification des données relatives à la sécurité et flux de données)
 SAFREP TF Safety Data Reporting and Data Flow Task Force
 SAFT Safety Management Team (Equipe "Gestion de la sécurité")
 SAG Surveillance Avionics Group
 SAG Security Access Gateway
 SAGAT Situation Awareness Global Assessment Technique
 SAGE Safety Awareness Group at the EEC
 SAI System Architecture Interface
 SAICO Swedish Aeronautical Information Computer Aided system
 SAIFIT Security Protection and Audit Concept for ATC IT-Systems
 SAIP Single Aeronautical Information Publication
 SAKAERONAVIGATSIA Georgian ANSP
 SAL Slot Allocation List
 SALADT Screening Angle and Line-of-sight Analysis from Digitised Terrain
 SALE Software Architect's Lifecycle Environment
 SALGOS Système d'Aide en Ligne à la Gestion Opérationelle de la Salle (FR)
 Page 362
 EUROCONTROL AIRIAL
 Acronym Full form
 SALIANT Situation Awareness Linked Indicators Adapted to Novel Tasks
 SALS Simple Approach Lighting System
 SALSA Situation Awareness bei Lotsen der Streckenflugkontrolle im Kontext von Automatisierung (situation
 awareness of en-route air traffic controllers in the context of automation)
 SALT Strategic Arms Limitation Talks
 SAM South America (ICAO Region)
 SAM Safety Assessment Methodology (méthodes d'évaluation de la sécurité)
 SAM Sequential Access Method
 SAM Slot Allocation Message (Message d'attribution de créneaux)
 SAM Shareable Airspace Module
 SAMAX Swiss Airport Movement Area Control System
 SAME Safety Assessment Made Easier
 SAMHS Spanish Aeronautical Messages Handling System
 SAMM Surface Area Movement Manager
 SAMM Surface Area Movement Management
 SAMSO Space and Missile Organization - US Air Force Systems Command /(now Space Division)
 SAMTF Safety Assessment Methodology Task Force
 SAN Stochastic Activity Networks
 SAN Satellite Access Node
 SAN SANitary
 SAND Safety Assurance for New Designs
 SANe Skill Acquisition Network
 SANIS Safety and Air Navigation Implementation Symposium (ICAO)
 SAO Signatories Affairs Office
 SAP System Access Parameters
 SAP Second Audio Programme (NTSC Add-on)
 SAP Surveillance Appraisal Programme
 SAP Service Advertisement Protocol
 SAP Service Access Point (RMCDE)
 SAPI Service Access Point Identifier
 SAPP Scheduling APPlication
 SAPPHIRE Satellite and Aircraft Database Programme for System Integrity Research
 SAPS Situation Awareness ProbeS
 SAR Search and Rescue
 Page 363
 EUROCONTROL AIRIAL
 Acronym Full form
 SAR Segmentation and Reassembly
 SAR System Access Request (Remedy schema)
 SAR Stand-Alone Receiver
 SAR Synthetic Aperture Radar
 SARA Speed and Route Advisor
 SARGAL Study for Research and Rescue in Galileo
 SARM Set Asynchronous Response Mode
 SARME Set Asynchronous Response Mode Extended
 SARP Signal Automatic Radar Processing (NL)
 SARPs Standards And Recommended Practices (Normes et pratiques recommandées) (ICAO)
 SARS Severe Acute Respiratory Syndrome
 SARSAT Search and Rescue Satellite Aided Tracking
 SART Situational Awareness Rating Technique
 SARTS Safety Related Training Scheme
 SAS Scandinavian Airlines
 SAS Surface Antenna Subfield
 SAS Single Attached Station
 SAS Single Attachment Station (FDDI)
 SAS SESAR & ATM Strategy (SESAR et stratégie ATM)
 SAS Stability Augmentation System
 SAS Shared ATS System
 SASE Stand Alone Synchronization Equipment
 SASHA Situation Awareness for SHAPE
 SASHA_L Situation Awareness for SHAPE on-Line
 SASHA_Q Situation Awareness for SHAPE Questionnaire
 SASI Support to ANSPs for SMS (Safety Management System) Implementation (Appui aux ANSP pour la mise en
 oeuvre des systèmes de gestion de la sécurité - SMS)
 SASKI Name of an ATS Route reporting point
 SASMAS SASS-S Development, Maintenance and Support
 SASP Separation and Airspace Safety Panel
 SASS Surveillance Analysis Support System (Dispositif d'appui à l'analyse des systèmes de surveillance)
 SASS-A SASS - Airborne
 SASS-C Surveillance Analysis Support System for ATC-Centre (Système de surveillance pour les centres ATC)
 SASS-C DMSS SASS-C Development, Maintenance, Support and Services
 Page 364
 EUROCONTROL AIRIAL
 Acronym Full form
 SASS-S Surveillance Analysis Support System � Sensor (Site)
 SAT Systems Approach to Training
 SAT Site Acceptance Testing
 SAT Static Air Temperature
 SAT SATurday
 SAT Software Acceptance Tests
 SAT System Acceptance Test
 SAT Satellite(s)
 SAT Site (System) Acceptance Test
 SAT Simulation Assessment Team
 SAT/I Inter-System System Acceptance Testing
 SAT/O Operational System Acceptance Testing
 SAT/S Stand-Alone System Acceptance Testing
 SAT/T Technical System Acceptance Testing
 SATCAS Selenia Air Traffic Control Automated System
 SATCNS Satellite Communications Navigation and Surveillance
 SATCNS WG Satellite CNS Work Group
 SATCO Senior Air Traffic Controller
 SATCO Signal Automatic Control
 SATCOM Satellite Communications
 SATI SHAPE Automation Trust Index
 SATNAV GNSS SATtellite NAVigation GNSS
 SATNAV GNSS Satellite Navigation Sub-Group (NAVSEP TF)
 SATORI Systematic Air Traffic Operations Research Initiative (US)
 SATP Software Acceptance Tests Plan
 SATS Simulator System for Air Traffic Services
 SATSA Swedish ATS Academy
 SAVASI Simplified Abbreviated Visual Approach Slope Indicator
 SAVVAN Système Automatique de Vérification en Vol des Aides à la Navigation (FR)
 SAW Surface Acoustic Wave (Filter)
 SAWD Surface Acoustic Wave Device
 SAWRS Supplemental Aviation Weather Reporting Station
 SAXFRA Slovenian Austrian Cross Border Free Route Airspace
 SB SouthBound
 Page 365
 EUROCONTROL AIRIAL
 Acronym Full form
 SB Service Bulletin
 SBA Standard Beam Approach (superseded by ILS)
 SBAS Satellite-Based Augmentation System
 SBB Sector Building Block
 SBO Sideband Only
 SBR Spaceborne Radar
 SBRME Set Balanced Response Mode Extended
 SBS Surveillance and Broadcast Services
 SBSR Space Based Secondary Radar
 SBT Shared Business Trajectory
 SBT Self Briefing Terminal
 SBT/RBT Shared Business Trajectory
 SBU Service Business Unit
 SBU Support Business Unit (EEC) (Unité "Activités d'appui")
 SBY Stand-BY message
 SBY Stand-BY (device status)
 SC Strato Cumulus
 SC System Controller
 SC Sector Coordinator
 SC Soft Copy
 SC Special Commitee
 SC Sector Configuration
 SC Senior Controller
 SC Standing Committee
 SC SCale
 SC Self-Contained (type of landing forecast)
 SC Single Click (Mouse Input)
 SC Schedules Conference
 SC Special Corridor
 SC Stack Controller
 SC Simultaneous Call
 SC Staff Committee
 SC String Controller
 SC Security Council (UN)
 Page 366
 EUROCONTROL AIRIAL
 Acronym Full form
 SC []
 SCale up: sdd picture zoom-out, in range intervals of 10nm
 SC [¯] SCale down: sdd picture zoom-in, in range intervals of 10nm
 SC-116B Special Committee 116B
 SC-135 Special Committee 135
 SC-147 Special Committee 147
 SC-167 Special Committee 167
 SC-186 Special Committee 186
 SC-187 Special Committee 187
 SC-209 Special Committee 209
 SC186 Special Committee 186
 SCA Safety-Critical Activities
 SCA Serial Communication Adapter
 SCAA Swedish Civil Aviation Authority
 SCAA Slovenian CAA
 SCAA Servicio de Control de la Circulación Aérea (ES)
 SCADA Supervisory Control And Data Acquisition
 SCALE display a set of sdd ranges for SCALE selection
 SCAMPI Standard CMMI Appraisal Method for Process Improvement
 SCAN Swiss Control Area Network
 SCAS Surveillance Coverage Analysis Suite
 SCAT Special Category
 SCAT Supersonic Civil Air Transport
 SCAT-1 Special Category 1
 SCATANA Security Control of Air Traffic and Air Navigation Aids
 SCATCC Scottish Air Traffic Control Centre
 SCC System Control Center
 SCC Satellite Control Centre
 SCC Solling Coordinating Controller
 SCCAG General Air traffic Coordination System
 SCCB Software Configuration Control Board
 SCCB System Change Control Board
 SCCM Senior Cabin Crew Member
 SCCO Sector Code Communication Object
 SCCS Software Configuration Control System
 Page 367
 EUROCONTROL AIRIAL
 Acronym Full form
 SCDB SASS-C db
 SCDT Selected Controlled Departure Times
 SCEAP Steering Committee for External Assistance Projects
 SCEPC Senior Civil Emergency Planning Committee
 SCF Standing Committee on Finance (comité permanent "Finances")
 SCF Surveillance Coordination Function
 SCF-BP SCF Budget Process Task Force (Équipe spéciale du SCF sur le processus budgétaire)
 SCG System Concept Group
 SCG Stakeholders Consultation Group (Groupe de consultation des partenaires)
 SCHUKO Schutzkontakt (DE) (earthing contact)
 SCIA Simultaneous Converging Instrument Approach
 SCM Signalling Carriage Mechanism
 SCM Subcontractor Manager
 SCM System Control and Monitoring
 SCM Software Configuration Management
 SCMM Safety Culture Maturity Model
 SCN Surveillance Coordination Network
 SCO Sector Coordinator
 SCOATCC Scottish Oceanic Air Traffic Control Centre
 SCODL Scan Conversion Object Description Language (Agfa)
 SCORS Surveillance Concepts and Operational Requirements
 SCP System Control Programming
 SCP Standard Correction Procedure
 SCP Support Computer Programme
 SCPC Special Connectivity PCs
 SCPC Single Channel Per Carrier
 SCPG SSR Code Planning Group
 SCPL Senior Commercial Pilot's Licence
 SCPS Satellite Communications Protocol Standard
 SCR Silicon Controlled Rectifier
 SCR Sustained Cell Rate
 SCR Scroll
 SCRAD Steering Committee for Research, Analysis and Development
 SCRN SCReeN
 Page 368
 EUROCONTROL AIRIAL
 Acronym Full form
 SCRR Service central des redevances de route (Central Route Charges Office - CRCO)
 SCRS Surveillance and Conflict Resolution System
 SCRSP Surveillance and Conflict Resolution System Panel
 SCS Sna Character String
 SCS Strategy Concept & System (EATMP Unit)
 SCS Squitter cA
 SCS System Concept and Scope
 SCS Security Certificate Service
 SCSI Small Computer System Interface (HDC/HDD)
 SCT Surveillance Coordination Team, (EATCHIP)
 SCT SCaTtered
 SCTA Service du Contrôle du Trafic Aérien (DGAC, DNA, France)
 SCTR SeCTor Role
 SCU Support CWP-Unit
 SCU Support Control Unit
 SCU Spoiler Control Unit
 SCU Support Computer Unit
 SCU Satellite Communications Unit
 SCV Sub-Clutter Visibility
 SD Special Designator
 SD Specialist Domain
 SD Surveillance Data
 SD Statistical Display
 SD Service Desk
 SD Social Dialogue
 SD Senior Director, EATM Service Business Unit
 SD Starting Delimiter
 SD Standard Deviation
 SD Storage Director
 SD Serial Dialling
 SD Software Development
 SD'xx' Specialist Domain 'number' (EATCHIP)
 SD/ESC Senior Directorate/European ATM System and Convergence
 SDA Social Dialogue Assistant (assistante au dialogue social)
 Page 369
 EUROCONTROL AIRIAL
 Acronym Full form
 SDA Système de Détection Aéroporté / Airborne Early Warning and Control System (=AWACS)
 SDA System Design Authority
 SDA SESAR Deployment Alliance
 SDAY Start DAY
 SDB Static Data Bank (MADAP)
 SDB Single European Sky Digital Backbone
 SDBY StanDBY
 SDC Staff Development Centre
 SDC Software Development Centre (within DEVD)
 SDCPS Safety Data Collection and Processing Systems
 SDD Software Design Document
 SDD Synthetic Dynamic Display
 SDD Synthetic Data Display
 SDD Static and Dynamic Data (EAD)
 SDD Service Description Document
 SDD Surveillance Data Distribution
 SDDLC System Design and Development Life Cycle
 SDDR-F/RUG Surveillance Data Distribution Requirements Focus Group/RMCDE User Group
 SDDS Surveillance Data Distribution System
 SDE (EUROCONTROL) Senior Director, European Air Traffic Management Programme
 SDE Smoke DEtector
 SDE System Development Environment
 SDE Submission Delivery Entity
 SDER Sous-direction des études et de la recherche appliquée
 SDF Software Development File
 SDF Simplified Directional Facility
 SDFI Sous-direction des finances de la DSNA
 SDG Strategic Development Group (ACIG)
 SDG Sensor Data Generator
 SDH Synchronous Digital Hierarchy
 SDI Single Document Interface
 SDK Software Development Kit
 SDL Standard Distribution List
 SDL Specification & Description Language
 Page 370
 EUROCONTROL AIRIAL
 Acronym Full form
 SDLC Software Development Life Cycle
 SDLC Synchronous Data Link Protocol
 SDLC Synchronous Data Link Control
 SDLS Satellite Data Link System
 SDM System Definition Manual (INMARSAT)
 SDM Serial Dial Module
 SDM Service Delivery Management
 SDM SESAR Deployment Manager (gestionnaire du déploiement de SESAR)
 SDM Supplementary Data Message
 SDM Systems Development Methodology
 SDM Strip Display Management (psychometric test for selection) (FEAST)
 SDMIF Sous-direction de la modernisation, de l'informatique de gestion et de la formation
 SDO Static Data Operations
 SDO Supplementary Display Option
 SDO Selected Display Option (ODID)
 SDO Standards Development Organisation
 SDO Static Data Operation (Gestion des données statiques)
 SDOE Senior Director Operations and EATCHIP = Director principal Operations et EATCHIP
 SDP Software Development Phase
 SDP Software Development Plan
 SDP Second Development Project
 SDP Static Data Procedures (AIS)
 SDP Surveillance Data Processing (Sub-group CCT/EATCHIP)
 SDP Simulator Development Programme
 SDP Session Description Protocol
 SDP Surveillance Data Processing
 SDPD Surveillance Data Processing and Distribution
 SDPDS Surveillance Data Processing and Distribution System
 SDPS Sous-direction de la planification et de la stratégie de la DSNA
 SDPS Surveillance Data Processing System (Système de traitement des données de surveillance)
 SDPTF Static Data Procedure(s) Task Force
 SDR System Design Review
 SDRH Sous-direction des ressources humaines de la DSNA
 SDS Surveillance Data Server
 Page 371
 EUROCONTROL AIRIAL
 Acronym Full form
 SDS Synoptic Display System
 SDSSS Software Development Standard for Space Systems
 SDT Stack Departure Time
 SDT Support, Development & Training Section (of FMD)
 SDT Software Development Testing
 SDTDL Saturating Drift Transistor Diode Logic
 SDTF SYSCO Development TF
 SDTF System Development Task Force
 SDU Synoptic Display Unit
 SDU Satellite Data Unit
 SDU Service Data Unit
 SDU Static Data Update message
 SDV Simulator Development
 SE System Engineering or System Engineer
 SE Strategy Element
 SE Software Engineer
 SE Sweden (ISO Country Codes)
 SE Situational Example (OGHFA)
 SE South-East
 SE Simulation Engine
 SEA Strategic Environmental Assessment
 SEAC SESAR European Airports Consortium
 SEAC Service d'Etat de l'Aviation Civile
 SEAFRA South-East Axis Free Route Airspace (Croatia, Serbia, Montenegro, Bosnia and Herzegovina)
 SEAP South European ADS Pre-Implementation Programme
 SEAT Site Equipment Acceptance Test
 SEB South-EastBound
 SEC civil SECtors & lower airspace SECtors (LAS)
 SEC Solling Executive Controller
 SEC Security
 sec Seconds
 SEC SECond(s) (60 in 1 minute)
 SEC SECtor map
 SEC SECtor
 Page 372
 EUROCONTROL AIRIAL
 Acronym Full form
 SECAM Safety, Efficiency and Capacity in ATM Methodologies
 SECBR Severely Errored Cell Block Ratio
 SECCODE SECtor ssr CODE
 SECG Software Engineering Coordination Group
 SECID Sector ID (N-FDPS)
 SecMS (ATM) Security Management System
 SECOP Sensor Coverage Planner Tool
 SECRA Secondary Radar
 SECT SECTor
 SecWG Information Security Working Group (Groupe de travail sur la sécurité de l'information)
 SEE Single Event Effect
 SEE Software Engineering Environment
 SEE-FABA South-East Europe Functional Airspace Block Activity (Approche fondée sur des blocs d'espace aérien
 fonctionnels dans le Sud-Est de l'Europe)
 SEI Software Engineering Institute
 SEL page SELection module (CCTV)
 SEL Sector Control List (N-FDPS)
 SEL nsap SELector
 SEL Sound Exposure Level
 SEL Sector List Window
 SEL System Architecture Element
 SELCAL SELective CALling system
 SELEX Italian ATM Systems Provider (formerly Alenia Marconi Systems)
 Self Self-paced Learning
 SELREL Selective Release
 SEM Semmerzake
 SEM System Engineering Manager
 SEM SEMaphone
 SEMP Software Engineering Management Plan
 SENSE Human Factors Programme
 SEP Selective Employment Plan
 SEP SEPtember
 SEP Separation of Aircraft
 SEP Sensor Evaluation Program
 Page 373
 EUROCONTROL AIRIAL
 Acronym Full form
 SEP STAR Entry Point
 SEP Spherical Error Probability
 SEQ SEQuence
 SEQE-UE Système d'échange de quotas d'émission (EU Emissions Trading System - EU ETS)
 SEQG Software Engineering Quality Group
 SER SERvice(ing)(ed)
 SERA Standardised European Rules of the Air
 SEROS Semmerzake Radar Operating System (B / Military)
 SeRT ATM Safety Regulatory Training Programme (Programme de formation à la réglementation de la sécurité de
 l'ATM)
 SES Supplementary Equipment and Services
 SES Single European Sky (ciel unique européen)
 SES-SEE Single European Sky extension to South East Europe
 SESAME Single European Sky Air Traffic Management (Modernisation Programme)
 SESAR Single European Sky ATM Research (Programme) ((Programme de) recherche ATM dans le cadre du Ciel
 unique européen) formerly SESAME
 SESAR PA SESAR Programme Area
 SESAR2020 Single European Sky ATM Research (2016-2022)
 SESFARR Single European Sky Factual Review and Reporting (Analyse factuelle et compte rendu relatifs au Ciel unique
 européen)
 SESI SES Implementation
 SESII Second Package of the Single European Sky
 SESIM SES Implementation by the Military/mise en oeuvre du SES par les militaires
 SESIS Single European Sky Implementation Support (Appui à la mise en oeuvre du ciel unique européen)
 SESS Software Engineering for Secure Systems
 SESY Service Systems Section (previous section of DEVD)
 SET initiate a parameter change
 SET ATM Security Team
 SETD Slot Estimated Time of Departure
 SEU Software Engineering Unit
 SEV SEVere (Icing, turbulence)
 SEVIS Student and Exchange Visitor Program
 SEW Software Engineering Workshop
 SEWG Software Engineering Working Group
 SF Security Flights
 Page 374
 EUROCONTROL AIRIAL
 Acronym Full form
 SF Scaling Factor
 SF Finland (ISO Country Codes)
 SF Surveillance Function
 SF Start Frame
 SF21 Safe Flight 21
 SFA Surveillance Functional Architecture
 SFACT Service de la Formation Aéronautique et du Contrôle Technique
 SFC Surface (Ground Level / Sea Level)
 SFCM Social Factors and Change Management
 SFD Start Frame Delimiter
 SFG Safety Focus Group
 SFI Synthetic Flight Instructor
 SFIE Syndicat des Fonctionnaires Internationaux et Européens (FR) / Union of International and European Civil
 Servants (=UIECS)
 SFL Supplementary Flight Level
 SFL System Flight Level
 SFL Sector Flight List
 SFLA SFL Above
 SFLA Assign SFL
 SFLB SFL Below
 SFM Simulation Facility Management (EEC)
 SFMC Sickness Fund Management Committee
 SFOR Stabilisation Force (Sarajevo)
 SFP State Focal Point
 SFPL Short Flight Plan (FDPS)
 SFPL System Fight Plan (N-FDPS)
 SFS Start of Frame Sequence
 SFT Simplified Fast Time Simulations
 SFT System File Table
 SG Sub-Group
 SG Sector Group (N-FDPS)
 SG Safety Group
 SG Snow Grains
 SGAMI Select Group for Assessing Manpower Issues (EATCHIP)
 Page 375
 EUROCONTROL AIRIAL
 Acronym Full form
 SGB State Governance Body (Instance de gouvernance des États)
 SGBD Système de Gestion de Base(s)/Banque(s) de Données = Database/Databank Management System
 (=DBMS)
 SGC Swept Gain Control
 SGCAS Study Group on Certification of Automatic Systems
 SGEG Surveillance Ground Environment Group
 SGL SiGnaL
 SGML Standard Generalised Markup Language
 SGN Signal GeNerator
 SGR Study Group for Route Charges (groupe d'étude pour les redevances de route)
 SGS 85 Sovietic Geodetic System
 SGSI Subsystema Grabador y Servidor de Información (ES) / Recording and Data server subsystem
 SH Sub-Header
 SH Session Header
 SH SHowers
 SHA Safety Hazard Analysis
 SHACC SHAPE Airspace Coordination Centre
 SHANDAP Shannon-Data Processing (System)
 SHAPE Supreme Headquarters Allied Powers Europe
 SHAPE Solutions for Human-Automation Partnerships in European ATM
 SHEL Software, Hardware, Environment, Liveware
 SHELL Software, Hardware, Environment, Liveware
 SHF Super High Frequency
 SHIELD Safety through Harmonised Implementation of European Local Databses
 SHK Statens haverikommission (Swedish Accident Investigation Authority)
 SHL Saville and Holdsworth Ltd.
 SHO Software Hand-Over
 SHOM Software Hand-Over Meeting
 SHORAN Short-Range Navigation
 SHS Special HeadSet
 SHT Statens havarikommisjon for transport (Accident Investigation Board Norway, AIBN)
 SI Système international / International System of Units
 SI Surveillance Identifier
 SI Shift In
 Page 376
 EUROCONTROL AIRIAL
 Acronym Full form
 SI Sector Indicator
 SI Slovenia, Republic of Slovenia
 SI Situational Interview
 SI Selective Interrogator
 SI Software Integrator
 SI Sistemi Integrati
 SI Surveillance Identity
 SI-Code Surveillance Identifier Code
 SI-Code Surveillance Interrogator Code
 SIA Service d'Information Aéronautique
 SIA Safety Improvement Area
 SIA Semiconductor Industry Association
 SIAM Service Integration and Management
 SIB Strategic IT Board
 SIB Safety Information Bulletin
 SIBT Scheduled In-Block Time
 SIC Sector Inactive list (Counter)
 SIC Sector Intercom (VCS)
 SIC System Identification Code
 SIC Sector InterCom function
 SIC Source Identification Code
 SIC Subject Indicator Code
 SICAS SSR Improvements and Collision Avoidance System
 SICAS/6 SICASP Panel Meeting No. 6
 SICAS/7 SICASP Panel Meeting No. 7
 SICASP SSR Improvements and Collision Avoidance Systems Panel (ICAO)
 SICASP/5 SICASP Panel Meeting No. 5
 SICASP/6 SICASP Panel Meeting No. 6
 SICCAP Système Intégré de Commande et de Contrôle Aérien du Portugal (FR)
 SICT System Implementation Coordination Team
 SICTA Italian Consortium for the Applied ATM Research
 SID Specification for Information Disclosure
 SID Standard Instrument Departure
 SID Service Identification Document
 Page 377
 EUROCONTROL AIRIAL
 Acronym Full form
 SID STATFOR Interactive Dashboard
 SID Subject Interface Document
 SIE Standard Interface Equipment
 SIF Selective Identification Feature
 SIF Successor IFF
 SIFP Single Initial Flight Plan (Plan de vol initial unique)
 SIG PT Significant Point (N-FDPS)
 SIG-P Special Interest Group, Peripherals esprit
 SIGMA Système informatique de gestion des mouvements aéroportuaires
 SIGMA Systemintegreging Gemensam Maskinvara (SE) / System Integration in Common Hardware
 SIGMA SDO Input Guidance Manual
 Sigma (Greek letter, upper case) Symbol for sum
 Sigma (Greek letter, lower case) Symbol for Standard Deviation
 SIGMET Significant Meteorological information
 SIGWX SIGnificant Weather
 SIL Safety Integrity Level
 SIL Sector Inbound List
 SIL Surveillance Integrity Level
 SIL Sector Inbound List Window
 SIM SIMulator
 SIM Security Incident Management
 SIM SIMulator subsystem
 SIM Sensor Interface Module
 SIM Subscriber Identity Module
 SIM Set Initialisation Mode
 SIM-5 Simulation Modernisation Project (EEC)
 SIMARTAS ARTAS CSCI Simulator of an ARTAS User
 SIMC Sickness Insurance Management Committee (comité de gestion du régime d'assurance maladie - CGRAM)
 SIMC SIMulator Control
 SIMEX Simulation expeditor
 SIMM Symbolic Integrated Maintenance Manual
 SIMM Single In-line Memory Module
 SIMMOD Simulation Model
 SIMOS SDDS Maintenance and Operational Support
 Page 378
 EUROCONTROL AIRIAL
 Acronym Full form
 SIMP System Incident Management Procedure
 SIMPLE SIP for Instant Messaging and Presence Leveraging Extensions
 Simul Simulation
 SIMUL SIMULtaneous(ly)
 SINAD Signal-to-Noise Ratio And Distortion
 SINTAC Système Intégré d'Identification, de Navigation, de Contrôle de Trafic, d'Anticollision & de Communication
 (FR)
 SIO Sector Input Operator (MAS Ops Room)
 SIOP Sector Input Operator Position
 SIOP Society for Industrial and Organisational Psychology, Inc.
 SIP Single In-line Package
 SIP SMDS Interface Protocol
 SIP Slot Improvement Proposal Message
 SIP Session Initiation Protocol
 SIP-CWP Controller Working Position employing SIP
 SIPit SIP interoperability tests
 SIPP Single In-line Pin Package
 SIPPING Session Initiation Protocol InvestIGation
 SIR Serveur d'Information Radar [Radar Information Server]
 SIR Serveur d'Information Réseau
 SIR Stakeholders Information Repository
 SIRE Safety Issue Rectification
 SIRH Système d'information des ressources humaines
 SIRO Simultaneous Intersecting Runway Operations
 SIROCCO Study of the Impact of Revised Operational Concepts on the CNS/ATM ODP Model
 SIS Support Information Systems
 SIS English Standard for Documentation
 SIS Stakeholders Implementation Support (CND)
 SIS Signal in Space
 SIS Special Information System
 SIS Schengen Information System
 SISCO Screen-to-Screen coordination
 SISG Safety Improvement Sub-Group
 SIT Subsystem Integration Test (DECADE)
 Page 379
 EUROCONTROL AIRIAL
 Acronym Full form
 SIT System Integration Team (EATCHIP)
 SIT Software Integration Test
 SIT Slot Issue Time Parameter
 SIT System Implementation Team (inside EATCHIP)
 SIT1 Slot Issue Time 1
 SIT2 Slot Issue Time 2
 SIT3 Slot Issue Time 3 When the clock time is he same as the CTOT
 SITA Société Internationale de Télécommunications Aéronautiques = Airline telecommunications and Information
 Service
 SITAP Simulator for Transportation, Analysis and Planning
 SITATEX Software developed by SITA
 SITD Systems Integration and Test Department (ODS)
 SITP Software Integration Test Plan
 SIWL Single Isolated Wheel Load
 SJA Strategic Job Analysis
 SJU SESAR Joint Undertaking (entreprise commune SESAR)
 SJU PSO SJU Project Support Office/ Bureau d'appui aux projets de la SJU
 SK Station Keeping
 SK Slovakia (country identifier)
 SKC SKy Clear
 SKED SchEDule(d)
 skeyes Belgocontrol (renamed in 2018)
 SKI Ski (winter) seasonal traffic flows
 SKIP SKIP a sector
 skyguide ANSP Switzerland / Prestataire de services de navigation aérienne pour la Suisse
 SLA Service-Level Agreement (Accord de niveau de service)
 SLA Site-Level Aggregation
 SLA Stochastic Lockout Acquisition
 SLAP Slot Allocation Procedures
 SLAR Side-Looking Airborne Radar
 SLB Sidelobe Blanking
 SLBM Submarine Launched Ballistic Missile
 SLC Slot Cancellation message (Message d'annulation de créneau)
 SLC Side Lobe Cancellation
 Page 380
 EUROCONTROL AIRIAL
 Acronym Full form
 SLC Synchronous Link Control
 SLD Super-cooled Large Droplets
 SLD Sector Load Diagram
 SLD Subscriber Line Digital
 SLDT Scheduled Landing Time
 SLEP Long Range Radar Service Life Extension Program
 SLHW Second Line Hardware
 SLI Supplementary Level Inbound (ODID)
 SLI minimum climbing Sector entry height
 SLIC Software LIfeCycle
 SLIC Subscriber Line Interface Card
 SLIP Serial Line Internet Protocol
 SLM Sound Level Meter
 SLM Standard Length Message (Mode S)
 SLO Supplementary Level Outbound (ODID)
 SLO States Liaison Office / Officer (chargé de liaison avec les États)
 SLO minimum non-Level flight Sector exit height
 SLOA Stochastic Lockout Acquisition
 SLOA Stakeholders Line of Action (Ligne d'action des partenaires)
 SLOC Source Line of Code
 SLOP Strategic Lateral Offset Procedure
 Slot An arrival or departure time window reserved for a flight.
 SLP Speed Limiting Point
 SLR Satellite Laser Ranging
 SLS Side-Lobe Suppression
 SLS Service Level Specification
 SLT Slot Allocation
 SLT Scheduled Landing Time
 SLV Statens Luftfartsvaesen (CAA/DK)
 SLW Selected Label Window
 SLW SLoW
 SLW Sector Load Window
 SM Security Manager
 SM Suspense Message
 Page 381
 EUROCONTROL AIRIAL
 Acronym Full form
 SM Stack Manager
 SM Segment Manager
 SM Systems Management
 SM System Management
 SM Surveillance Map
 SMA Surface Movement Advisor
 SMA Spectrum Management Activities
 SMAA Study for Mediterranean Area ADS
 SMAE Systems Management Application Entity
 SMAG Safety Management Advisory Group
 SMAN Surface Manager
 SMAN Surface Management (APATSI)
 SMAP Systems Management Application Process
 SMART Self-Managed Arrival Resequencing Tool
 SMART System Monitoring And Revision Team
 SMART Specific, Measurable, Agreed, Relevant (or Realistic), Timely
 SMART Simulator for Multi-radar Analysis for Realistic Traffic
 SMART Senior Management Refresher Training Programme
 SMAS STATFOR Medium-Term Forecast Access System
 SMAS Service Mobile Aéronautique par Satellite / Satellite Mobile Aeronautical Service
 SMATSA Serbia and Montenegro Air Traffic Services Agency
 SMAW Safe Minimum Altitude Warning
 SMC Station Monitoring and Control (RMCDE)
 SMC Systems Management Concept
 SMC System Management Centre
 SMC System Monitoring Computer
 SMC Surface Movement Control
 SMD Storage Module Device (interface)
 SMD Surface-Mounted Device
 SMDE Software Maintenance and Development Environment
 SMDR Station Message Detail Recording
 SMDS Switched Multimegabit Digital Service
 SMDS Switched Multimegabit Data Service
 SME Systems Management Entity
 Page 382
 EUROCONTROL AIRIAL
 Acronym Full form
 SME Subject Matter Expert
 SMED Single Minute Exchange, or Die
 SMEQ Subjective Mental Effort Questionnaire
 SMF System Management Function
 SMG System Management Group of the AAG
 SMGC Surface Movemant Guidance and Control
 SMGC(S) Surface Movement Guidance and Control System
 SMGCS Surface Movement Guidance and Control System
 SMGET Surveillance Map Generator
 SMHI Swedish government-owned (civil) MET Institute
 SMI Standard Message Identifier
 SMI Stakeholder Relations Management and International Coordination (EATMP Unit)
 SMI Structure of Management Information
 SMI Separation Minima Infringement
 SMICG Safety Management (systems) International Collaboration Group
 SMIDTS Synthetic Movings Image Didactic / Tower Control Simulator (RLW/RVA)
 SMIME Secure MIME
 SMIP Simple Management Information Protocol
 SMIP Safety Measure and Improvement Programme
 SMIP Small and Medium size Infrastructure Projects
 SMIS Specific Management Information Services
 SMITF Safety Monitoring and Improvement Task Force
 SMM Software Management Meeting
 SMM Slot Missed Message
 SMM Sector Monitor Message (RMCDE)
 SMM Safety Management Manual
 SMM Safety Managers Meeting
 SMO Standards Making Organisation
 SMP Software Maintenance Plan
 SMP SESAR Safety Management Plan
 SMP Simple Management Protocol
 SMP A proposed evolution of SNMP (definition unknown)
 SMPDU Service MPDU
 SMPT Simple Mail Transfer Protocol
 Page 383
 EUROCONTROL AIRIAL
 Acronym Full form
 SMR Surface Movement Radar
 SMS Service Management System
 SMS Switching Management System
 SMS Surface Movement System
 SMS System Manager Station (Hardware)
 SMS Service Monitoring System
 SMS Short Message Service
 SMS Safety Management System (système de gestion de la sécurité)
 SMS System Manager System (ARTAS)
 SMS Surface Management System
 SMSS Surface Movement Surveillance System (airports)
 SMSTR Systems Management Strategy
 SMT Shared Mission Trajectory
 SMT Standard Message Text
 SMT Station Management (FDDI / RMCDE)
 SMT Simple Message Text
 SMTP Simple Mail Transfer Protocol
 SMU Social & Medical Unit (EEC)
 SMX Sub-Multiplexer
 SMX Sub MultipleXer (Redundant anno 1991)
 SN Sequence Number
 SN Signal-to-Noise
 SN Safety Net (N-FDPS)
 SN Subnetwork
 SN SNow
 SN Subscriber Number
 SN Sub-Network
 SN System Notam
 SNA Satellite Navigation
 SNA Satellite Navigation Application
 SNA System Network Architecture (IBM Network)
 SNA Systems Network Architecture
 SNA-RP Service de Navigation Aérienne - Région de Paris
 SNAc Subnetwork Access
 Page 384
 EUROCONTROL AIRIAL
 Acronym Full form
 SNAcF Subnetwork Access Function
 SNACP Sub-Network ACcess Protocol
 SNAcP Subnetwork Access Protocol
 SNADS Systems Network Architecture Delivery System
 SNAP Standard Network Access Protocol
 SNAS Satellite Navigation Augmentation System
 SNASG Satellite Navigation Applications Sub-Group
 SNC Sub-Network Connect
 SNC Small-scale aeronautical Navigation Chart (ICAO)
 SNDC Subnetwork Dependent Convergence
 SNDCF Subnetwork Dependent Convergence Function/Facility
 SNDCP Sub-Network Dependent Convergence Protocol
 SNET Safety Net (Filet de sauvegarde)
 SNICF Subnetwork Independent Convergence Function
 SNICP Subnetwork Independent Convergence Protocol
 SNIR Signal-to-noise ratio
 SNM Systems Network Management
 SNM Sub-Network Management
 SNME Subnetwork Management Entity
 SNMP Simple Network Management Protocol (RAPNET - CNG-)
 SNOTAM Snow Notification to Airmen
 SNOWTAM SNOW State Message To Airmen (Message containing snow fall information)
 SNPA Subnetwork Point of Attachment
 SNPDU Subnetwork Dependent Protocol Data Unit
 SNR flatbed ScaNneR (CCTV)
 SNR Sequence Number of Received packet (for an SVC)
 SNR Signal-to-Noise Ratio
 SNRM Set Normal Response Mode
 SNRME Set Normal Response Mode Extended
 SNS Subnetwork Service
 SNS Sub-Network Source
 SNSDU Subnetwork Service Data Unit
 SNSH SNow SHowers
 SNTP Simple Network Time Protocol
 Page 385
 EUROCONTROL AIRIAL
 Acronym Full form
 SNVN Subnetwork Version Number
 So The Present (undesired) state
 SO Specialist Objective, (EWPD)
 SO Shift Out
 SO Strategy Officer (from DEVD)
 SO Safety Objective
 SO Standards Office (EUROCONTROL)
 SOA Service-Oriented Approach / Architecture (SESAR)
 SOA Safety Oversight Audit (Audit de la supervision de la sécurité)
 SOAM Systemic Occurrence Assessment Method
 SoaML Service-oriented architecture Modelling Language
 SOAP Simple Object Access Protocol
 SOBT Scheduled Off-Block Time
 SOC Security Operations Centre (centre des opérations de sécurité)
 SOC Start of Climb
 SOC System / Sector Operations Centre
 SOCS Safety Objective Classification Scheme
 SOE Software Engineer
 SOF Stand-alone Operations Facility
 SOFA PfP Status of Forces Agreement Partnership for Peace
 SOFIA Sequentially Outlining and Follow-up Integrated Analysis (EUROCONTROL Headquarters, EATMP, DSA,
 SQS)
 SOFREAVIA Société Française d'Etudes et de Réalisations d'Equipments Aéronautiques (FR)
 SOG System Operator Guide
 SOGITS Senior Official Group in IT Standardisation
 SOH Start Of Header
 SOI Supplementary Operating Instruction
 SOIR Simultaneous Operations on parallel (or near-parallel) Instrument Runways
 SOL Sector Outbound List (MDP)
 SOM Start Of Message
 SONAR Sensing, Openness, Non-judgment, Assessment, Resolution
 SONET Synchronous Optical Network
 SOOD Safety Oversight Overview Document (ESIMS)
 SOP Start Of Picture
 Page 386
 EUROCONTROL AIRIAL
 Acronym Full form
 SOP System Operation Procedure
 SOP Standard Operating Procedure
 SOR State of Readiness
 SORA Specific Operations Risk Assessment
 SORA Safety Oversight / Occurrence Reporting and Assessment
 SORA Safety Occurrence Reporting and Assessment in ATM
 SORTBOX function combining sarp & madap flight plan data
 SOS Systems Operations Section of ENGD
 SOSG Safety Oversight Study Group (ICAO)
 SOST Scheduled On Stand Time
 SOT Sector Opening Times
 SOTA Sector Opening Times Architect
 SOTA South Oceanic Transition area
 SOTA Shannon Oceanic Transition Area
 SOV System Operations Validation
 SOV Storage Operating system and Virtualization
 SOW Statement of Work (ODS)
 sp ground SPeed
 SP Succession Planning
 SP Significant Point
 SP Supervisory Packet
 SP Special point
 SP Service Provider
 SP SPecial designator
 SP SPace
 SP Special Purpose Indicator
 SP Special Purpose Indicator (ASTERIX)
 SP Standard Precision
 SP System Parameter (Madap)
 SPA Slot Proposal Acceptance Message
 SPA Special Procedure Airspace
 SPACDAR Specialist Panel on Automatic Conflict Detection And Resolution
 SPACE Study and Planning of AMHS Communications in Europe
 SPADE Supporting Platform for Airport Decision-making and Efficiency
 Page 387
 EUROCONTROL AIRIAL
 Acronym Full form
 SPADE SNMP Proxy Agent Device
 SPAF Strategic Performance Analysis and Forecast
 SPAM Situation Present Assessment Method
 SPARC Scaleable Processor ARChitecture
 SPAS Sensor Performance Analysis Standard
 SPC Spectrum Management
 SPC Stored Program Control
 SPC Surveillance Product Centre
 SPC Statistical Process Control
 SPCCO Sector Planning Conflict Communication Object
 SPD Software Product Description
 SPD Speed
 SPD Speed (N-FDPS)
 SPDA Surveillance Data Processing System Processing Delay Analysis
 SPDS Surveillance Data Processing System
 SPDU Session Protocol Data Unit
 SPDU Squitter PDU
 SPE SPEcial codes (SSR)
 SPECI aviation selected SPECIal weather report (in meteo code)
 SpecTRM-RL Specification Tools and Requirements Methodology - Requirement Language
 SPES Single Pan-European Sky
 SPF Strategic Performance Framework
 SPF System Productivity Facility
 SPF Structured Planning Framework
 SPF Scratch Pad Field
 SPF Standard Precision Format
 SPG Spectrum Protection Group
 SPG SRC Strategy and Policy Group
 SPG Special Planning Group
 SPI Special Pulse Identification
 SPI Special Protocol Identifier
 SPI Special Position Indicator
 SPI Special Pulse (Position) Identification (SSR)
 SPI Special Position Identification (SSR)
 Page 388
 EUROCONTROL AIRIAL
 Acronym Full form
 SPI Safety Performance Indicator
 SPI Special Position Identification
 SPI IR Surveillance Performance and Interoperability Implementing Rule
 SPICE Synchronised PBN Implementation Cohesion Europe
 SPICSY Standardised communication Protocols to support Intra-centre Communications between ARTAS Systems
 SPIN Safety Nets Performance Improvement Network
 SPIN-TF Safety nets: Planning Implementation or eNhancements Task Force, SPIN Task Force
 SPIRITS Service in the PSTN/IN requesting Internet Services
 SPISC Specific Pre Implementation Safety Case
 SPL Supplementary flight PLan (message type designator)
 SPL System Flight Plan
 SPL Student Pilot's Licence
 SPL Sarp Plain Language message
 SPM SPecial Message
 SPM Source Programme Maintenance
 SPMF Standards Programme Management Function
 SPMP Software Project Management Plan (ODS)
 SPMS Spare Part Management System
 SPN Short PlaN
 SPN Stochastic Petri Nets
 SPO Special Project Office
 SPO Strategic Plan of Operation.
 SPO Single Person Operations
 SPOC Single Point Of Contact
 SPOM South Pacific Operations Manaual
 SPOOL Simultaneous Peripheral Operation On-Line
 SPORA Specialist Panel on Operational Research and Analysis
 SPOSS Surveillance Products and Open Source Software
 SPOT SPOT Wind
 SPP Service for Protection and Prevention at Work (service de prévention et de protection au travail)
 SPPAT Strategic Planning and Performance Assessment Tool
 SPR Service Provision Regulations
 SPR Safety and Performance Requirements
 SPR Strip Printer
 Page 389
 EUROCONTROL AIRIAL
 Acronym Full form
 SPR BD Sector Productivity Business Division (EUROCONTROL - DAP Business Directorate)
 SPRINT Strategic PRogramme for INnovation & Technology Transfer
 SPS Siemens Plessey Systems
 SPS STDMA/VDL Mode 4 Performance Simulator
 SPS Standard Positioning Service
 SPS-UFIG Surveillance Products and Services User Funding Implementation Group
 SPSD Static Pairwise Separation for Departures
 SPSG Spectrum Protection Steering Group (IATA)
 SPSS Statistical Package for the Social Sciences
 SPT Strategic Planning Team
 SPT Separation Performance Tool
 SPT Sectors Per Track
 SPX Sequenced Packet eXchange
 SQ SQuall
 sq-cm cm2
 sq. in. Square inch
 SQA Software Quality Assurance
 SQE Software Quality Engineer (DECADE)
 SQL Structured Query Language
 SQM Surveillance Quality Monitoring
 SQM Signal Quality Monitoring
 SQP Signal Quality Parameter
 SQS Safety, Quality and Security (sécurité, qualité et sûreté)
 SQSM Safety Quality Security Manager (responsable de la sécurité, de la qualité et de la sûreté)
 SQU Squelch (VCS)
 SQWK Squawk (N-FDPS)
 SR Standard Route
 SR Study Report
 SR Status Report
 SR System Restart
 SR Staff Regulations
 SR SunRise
 SR Software Requirements
 SR Slovak Republic (but ISO code=SK)
 Page 390
 EUROCONTROL AIRIAL
 Acronym Full form
 SR/R Software Requirements Review
 SRA Safety Risk Assessment
 SRA Strategic Research Agenda
 SRA Surveillance Radar Approach
 SRAM Static RAM
 SRAP Secondary Runway Aiming Point
 SRAT Super Role Allocation Tool
 SRB Solid Rocket Booster
 SRBP Synthetic Resin Bonded Paper
 SRC Safety Regulation Commission (Commission de réglementation de la sécurité)
 SRC SouRCe reference
 SRD Software Requirements Document
 SRD System Research and Development
 SRD System (or Software) Requirements Document
 SRDTF System Research & Development Task Force
 SRE Surveillance Radar Element of par system
 SRE Slant Range Error
 SREJ Selective Reject
 SRG Short RanGe
 SRG Safety Regulation Group
 SRG Software Requirement Group
 SRGM Software Reliability Growth Model
 SRI Inertial Reference System
 SRI Socially Responsible Investments
 SRI Stanford Research Institute
 SRI System Replay and Investigation
 SRIA Strategic Research and Innovation Agenda (ACARE)
 SRJ Slot Proposal Rejection message
 SRK Skill-Rule Knowledge
 SRM Software Reliability Model
 SRM Stakeholder Relations Management
 SRM Sector Revision Message
 SRM Safety Reference Material (SESAR)
 SRM Slot Revision Message
 Page 391
 EUROCONTROL AIRIAL
 Acronym Full form
 SRM System Reconfiguration Memory
 SRM Stakeholder Relations Management
 SRP Slot Revision Proposal
 SRP Slot Reference Point
 SRP Spacing Reference Point
 SRP Significant Reporting Point
 SRPI Server/Requester Programming Interface
 SRQ Slot Request
 SRR Search and Rescue Region
 SRR Slot Revision Request
 SRR System Requirements Review
 SRS Side Receiving Station
 SRS Segment Request Sub-field
 SRS Schéma d'acheminement standard (FR)
 SRS Standard Routing Scheme (as of 19/04/01 replaced by RAD)
 SRS Software Requirement Specification
 SRSG Safety Regulation Sub-Group
 SRT Slot Reference Time
 SRT Sort RouTine
 SRT Single Radar Tracker
 SRT Source Route Transparent
 SRTM Shuttle Radar Topography Mission
 SRU Shop Replaceable Unit
 SRV Server (Software)
 SRY SecondaRY
 SS Server System (ARTAS)
 SS Sector Supervisor
 SS Supervisory Subset
 SS System Start
 SS Server (Hardware)
 SS SunSet
 Ss seconds
 SS Session Service
 SS-CI Supplementary Service- Call Intrusion
 Page 392
 EUROCONTROL AIRIAL
 Acronym Full form
 SS-CPI Supplementary Service- Call Priority Interrupt
 SS-CPIP Supplementary Service-Call Priority Interrupt Protection
 SS7 Signalling System Number 7
 SSA Structured System Analysis
 SSA System Safety Assessment (Evaluation de la sécurité des systèmes); Safety Security Assessment (EAD)
 SSA Software Support Administration
 SSA Smallest Space Analysis
 SSA-DG Operational Requirements for System Support to ASM Drafting Group
 SSADM Structured System Analysis and Design Method
 SSALS Simplified Short Approach Lighting System
 SSAP Strategic Safety Action Plan (Plan d'action stratégique pour la sécurité)
 SSAP Source Service Access Point (RMCDE / RADNET)
 SSAP Session Service Access Point
 SSAS Software Safety Assurance System
 SSAS Surveillance Support Analysis System
 SSB Single Side Band
 SSBA Service spécial des bases aériennes
 SSBA Suite Synthétique de Benchmarks de l'AFUU (FR)
 SSC Supplementary Service Control
 SSC Supervision Component (Subsystem of BSC)
 SSC Single Sky Committee
 SSCC Safety Standards Consultative Commitee
 SSCP System Services Control Point
 SSCVR Solid-State Cockpit Voice Recorder
 SSD Synthetic Situation Display
 SSDD System/Segment Design Document
 SSDG Surveillance Strategy Drafting Group
 SSDU Session Service Data Unit
 SSE Safety Significant Event Scheme
 SSE South-South-East
 SSE Specific Service Entity
 SSE Sum of Squared Errors
 SSEA Surveillance Data Processing System Systematic Error Analysis
 SSEC Static Source Error Correction
 Page 393
 EUROCONTROL AIRIAL
 Acronym Full form
 SSEP Self-Separation
 SSF Software Safety Folder
 SSFDR Solid-State Flight Data Recorder
 SSG Service Steering Group
 SSG System Sub-Group (of the EAG)
 SSGHI Surveillance Sub-Group on Harmonisation and Implementation
 SSGS Surveillance Sub-Group on Standards
 SSGT Surveillance Sub-Group on Tools
 SSH Safety, Security & Human Factors (EATM) (Sécurité, sûreté et facteurs humains)
 SSI Site System Inspection
 SSID Station Slot Identifier
 SSIM Standard Scheduling Information Manual
 SSL Secure Socket Layer
 SSM System Surveillance and Maintenance
 SSM Safety and Security Management
 SSM BD Safety & Security Management Business Division (EUROCONTROL - DAS Business Directorate)
 SSMA Spread Spectrum Multiple Access
 SSN sun spot number
 SSND Satellite SubNetwork Dependent
 SSNDP Satellite Subnetwork Dependent Protocol
 SSO Sun Synchronous Orbit
 SSO STAR Support Office
 SSP Secondary Spare Part
 SSP State Safety Programme
 SSP Sole Source Procurement
 SSP Source Selection Panel (MADAP)
 SSP System Security Policy
 SSPA Solid State Phased Array
 SSPSG Structures for Service Provision Sub-Group (High-Level Group Single European Sky (EU)
 SSR Software Specification Review
 SSR Secondary Surveillance Radar (Radar secondaire de surveillance)
 SSR Solid State Relay
 SSR Mode S Mode S Selective Address SSR
 SSR-CF SESAR Safety Regulation Coordination Function
 Page 394
 EUROCONTROL AIRIAL
 Acronym Full form
 SSRBRIGH create track and intensify position symbol & label
 SSRBRIGH Highlight set code to target (input)
 SSRC Current SSR Code
 SSRCI Synchronization Source Identifier
 SSS Surveillance Status Subfield
 SSS Source Select Switch (ODS)
 SSS Staff Satisfaction Survey
 SSS System/Segment Specification
 SSS System Segment Specification
 SSSAR System Safety Security Assessment Report
 SSSC Safety Supervisory Steering Committee
 SSSO Specialised Satellite Service Operators
 SSSP System Selection Switch Panel
 SSSP EU Subgroup on Structures for Service Provision (see SSPSG)
 SST SuperSonic Transport
 SSTD System Segment Test Description
 SSTF Surveillance Standard Task Force
 SSTL Surrey Space Technology Limited
 SSTS Space Surveillance and Tracking System
 SSU Subsequent Signal Unit
 SSUP Sector SUPervisor
 SSV Sub-System Validation
 SSW South-South-West
 SSWG System Support Working Group
 ST STratus
 ST Subjacent Tracked
 ST Special Task
 ST Standard Paths
 ST Specialist Task
 ST Supervisory Type
 ST Standard Time
 ST Short-Term
 ST System Testing
 ST SlanT
 Page 395
 EUROCONTROL AIRIAL
 Acronym Full form
 ST Specialist Task (EATCHIP)
 ST STation
 ST-ICD Short-Term Interface Control Document
 ST/I System Testing - Interoperability
 STA STAtistics
 STA Staggered Threshold Approach
 STA Scheduled Time of Arrival
 STA STraight-in Approach
 STAC Second-Time-Around Clutter
 STAIRS STorage And Information Retrieval System
 STALO Stable Local Oscillator
 STAM Short-Term ATFCM Measures
 STANAG NATO Standardization Agreement (Accord de normalisation OTAN)
 STANAG NATO Standardization Agreement
 STANINE Standard Nine Score
 STANLY Statistics and Analysis
 STANS Simulation of a Total Air Navigation System
 STAPES System for Airport Noise Exposure Studies
 STAR Second Time Around Returns (Radar)
 STAR Système de Traitement des Archives et Redevances (FR)
 STAR Studies, Tests and Applied Research (former STT)
 STAR SESAR Tool for ATM Roll-out
 STAR Safety Target Achievement Roadmap
 STAR Sistema Telegráfico Automático de Retransmissão (PoAF) (PT)
 STAR Self Test and Repair
 STAR Surface to Air Recovery
 STAR Standard Instrument Arrival
 STARS Standard Terminal Automation Replacement System
 STARS Surveillance and Tracking Attack Radar System
 START-OVER Process of putting in action the COLD-STANDBY
 STAT Second-Time-Around Targets
 STAT Static Maps (N-FDPS)
 STAT Statistics
 STATE Military, customs or police flight (Flight plan status indicator)
 Page 396
 EUROCONTROL AIRIAL
 Acronym Full form
 STATFOR EUROCONTROL Statistics and Forecasts Service
 STATS STATisticS
 STAY Time spent in an area (STAY area)
 STB TF Short-Term Benefits Task Force
 StBf Structured Briefing
 STBY Standby (Transponder Operating Mode)
 STC Supplemental Type Certificate
 STC Sensitivity Time Control
 STC Steering Committee
 STC Simulation Technical Coordinator
 STC SHAPE Technical Centre (NATO, The Hague)
 STC Short-Time Constant
 STCA Short-Term Conflict Alert (Avertissement de conflit à court terme)
 STCD Short-Term Conflict Detection
 STCW Short-Term Conflict Warning
 STD STandarD (Label)
 STD Software Technical Designer
 STD Scheduled Time of Departure
 STD Software Transfer Document
 STD Standard
 STD Subscriber Trunk Dialling
 STD State Transition Diagram
 STD Standard Deviation
 STD Software Test Description
 StDf Structured Debriefing
 STDM Statistical Time Division Multiplex
 STDMA Self-Organising Time Division Multiplex Access
 STEADES Safety Trend Evaluation and Data Exchange System
 STEM Science, Technology, Mathematics and Engineering
 STEP Social, Technological, Environmental and Political
 STF Sub-network Test Facility
 STF StraTiForm
 STF Selection Task Force
 STF Short-term forecast
 Page 397
 EUROCONTROL AIRIAL
 Acronym Full form
 STF ARTAS Surveillance Task Force on ARTAS Development
 STF-SDPS Surveillance Task Force on Surveillance Data Processing Systems
 STFAD Surveillance Task Force on ARTAS Development
 STFAP Surveillance Task Force on the Appraisal Programme
 STFDPPAS Surveillance Task Force on the Data Processing Performance Analysis Standard
 STFRDE Surveillance Task Force on Radar Data Exchange
 STFRL Surveillance Task Force on Reference Levels
 STFRSS Surveillance Task Force on the Radar Surveillance Standards
 STFSDIR Surveillance Task Force on Surveillance data Distribution Infrastructure Requirements
 STFSPAS Surveillance Task Force on the Sensor Performance Analysis Standard
 STFTE Special Task Force of Training Experts
 STFTV Surveillance Task Force on Transponder Verification
 STG EUROCONTROL Standards Group . See SSGS
 STIP Système Central de Traitement Initial de Plans de vol
 STL Software Template Library
 STLP ATS Selection Training and Licensing Panel
 STM Synchronous Transport Mode
 STM Surface Traffic Management
 STMP Special Traffic Management Program (US)
 STN SubTask No. for the mc module
 STN STatioN
 STNA Service technique de la navigation aérienne (Air navigation technical service)
 STNR STatioNaRy
 STOA Scientific and Technological Options Assessment
 STOL Short Take-Off and Landing
 STORIA Simulation Tool for Online Recording and Analysis (ESCAPE simulator recording component)
 STORIA Simulation Tool for Online Recording and Analysis
 STORIA Software Tool for Online Recording and Interactive Analysis
 STOT Scheduled Take-Off Time
 STP Software Test Plan (MAS/DFS - ODS)
 STP Standardised Training Package
 STP Spanning Tree Protocol
 STP Shielded Twisted Pair
 STP Surveillance Transmit Processing Subsystem
 Page 398
 EUROCONTROL AIRIAL
 Acronym Full form
 STPV Service du Traitement automatique des Plans de Vol (F-FPPS)
 STR Strategic System
 STR Service du Traitement des données Radar (F-RDPS)
 STR Secure Transaction Recorder
 STR Software Test Report (ODS)
 STR (STRAT) Strategic System
 STRANGE Simplified Trajectory Generator
 STRAT Strategic System
 STRAT Strategic Planning System
 STRAT-TF Surveillance Strategy Task Force
 STREP Specific Targeted Research Project
 STRGP Software TRaininG Plan
 STRIDA Système de Traitement, d'Identification et de Visualisation des Données de la Défense Aérienne (FR)
 STS Stand-by Telephone System
 STS Status Indicator
 STS STatuS (Coordination)
 STS Standby Telephone System
 STS System Status
 StS Support to States (EUROCONTROL) (replaced by SIS - Stakeholders Implementation Support)
 STS Status
 STSMOD Delay ac (input)
 STSMOD STatuS MODification
 STT Studies, Tests and Trials (now STAR)
 STTT Scheduled Time To Turnround
 STU Selected Trajectory Update
 STUD Innovative studies (ARDEP)
 STW Slot Tolerance Window
 STWG Special Technical Working Group (EUROCONTROL management and trade unions)
 STWL STop-Way Lights
 STX Start of TeXt
 SU Signal Units
 SU SUmmer time (1st SUN APR until last SUN SEP)
 SU Soviet Union
 SUA Special Use Airspace
 Page 399
 EUROCONTROL AIRIAL
 Acronym Full form
 SUATMS Single Unified ATM System
 SUB Sub-addressing
 SUBJ SUBJect to ...
 SUC Start-Up Controller
 SUCT Surveillance analysis and Calibration Tools (ARDEP)
 SUD System Under Description
 SUDP Surveillance data Processing (ARDEP)
 SUF Service Units Forecast
 SUGCT Surveillance User Group on Centre Tools
 SUGST Surveillance User Group - Sensor Tools
 SUID Set User ID
 SUM Software User Manual
 SUMI Software Usability Measurement Inventory
 SUN SUNday
 SUP watch SUPervisor
 SUP Internal abbreviation for the course
 SUP Supplement
 SUP Supervisor
 Sup. Pract. Supervised Practices
 SUP/ACC Supervisor Area Control Centre
 SUP/APP Supervisor Approach
 SUP/MIL Supervisor military
 SUPPS Supplementary Procedures
 SUPPS Regional Supplementary Procedures (ICAO)
 SUPR (Flight Plan) Supervisor Operator
 SUPRA Support for Presently Unserved Airspace
 SUPSIS Supervisor (Centre and System)
 SUR Surveillance domain (Domaine "Surveillance")
 SUR Shortest Unconstrained Route
 SUR-ADS IANS ADS Course
 SUR-RAD IANS Surveillance Course
 SUR-RF NIPS Performance of 1030/1090 RF bands
 SUR-T Surveillance Team (EATM)
 SURF (Airport) Surface
 Page 400
 EUROCONTROL AIRIAL
 Acronym Full form
 SURF IA Surface Indications and Alerts
 SURT Surveillance Team
 SURT Screen Update Response Time
 SurvITE Surveillance Integrated Tested for EATMS
 SUSIS Sector, Unusual, Situation, Information, Split
 SUT System Under Test
 SUTP Software Unit Test Plan
 SV Service Volume
 SV Secure Voice
 SV Synthetic Vision
 SV Space Vehicle (Satellite)
 SV System Validation
 SVC Service Verification Centre (from DEVD)
 SVC SerViCe processor
 SVC SerViCe message (AFS stations only)
 SVC Switched Virtual Circuits (RMCDE / SIR)
 SVC Service
 SVC Switched Virtual Call
 SVCBL SerViCeaBLe
 SVD Software Version Description
 SVFR Special Visual Flight Rules (règles spéciales de vol à vue)
 SVGA Super Video Graphics Array
 SVID System V Interface Definition
 SVN Space Vehicle Number
 SVP Supervisor
 SVP SerVice Processor (SMC context)
 SVS Sprachvermittlungssystem (DE)
 SVS Synthetic Vision System
 SVVP Software Verification and Validation Plan (ODS)
 SW South-West
 SW Software
 SW SWitching box (ADMAR)
 SW Software
 SW Swerling
 Page 401
 EUROCONTROL AIRIAL
 Acronym Full form
 SWA Software Architecture
 SWAL Software Assurance Level (From ESARR 6)
 SWAP Severe Weather Avoidance Procedure
 SWAT Subjective Workload Assessment Technique
 SWB South-WestBound
 SWCI SoftWare Configuration Item (ODS) (equivalent to a primary subject)
 SWG SRC Workgroup for liaison with EUROCAE WG
 SWG Simulation Working Group
 SWG Security Working Group (advisory sub-group of CISC) / Groupe de travail sur la sûreté
 SWI Swisscontrol Interface
 SWIFT Society for Worldwide Interbank Financial Telecommunication
 SWIFT Specifications for Working positions In Future Air Traffic Control
 SWIM System-Wide Information Management (Système de gestion de l'information à l'échelle du système)
 SWIM-TI SWIM Technical Infrastructure
 SWIMSUIT System-Wide Information Management Supported by Innovative Technologies
 SWM SIP Wanted Message
 SWORD Subjective WORkload Dominance technique
 SWOT Strengths, Weaknesses, Opportunities and Threats
 SWP Sub Work Package
 SWP Software Simulation Package
 SWP Strategic Workforce Planning
 SWP Support Working Position (ODS)
 SWR Standing Wave Ratio
 SWS Synchronous Work Station
 SWS Silly Window Syndrome
 SWS SoftWare Service (LAN)
 SWSAS Software Safety Assurance
 SWU Software Unit
 SWY StopWaY
 SWY Stopway (ICAO)
 SX SimpleX (transmission)
 SXCOP Sector Exit Coordination Point
 SXIT Scheduled Taxi-In Time
 SXOT Scheduled Taxi-Out Time
 Page 402
 EUROCONTROL AIRIAL
 Acronym Full form
 SY Syrian Arab Republic (ISO Countries Codes)
 SYCA System Capacity
 SYCO System Configuration
 SYCU SYnthetic (video) Control Unit
 SYLK SYmbolic LinK (graphics file format)
 SYMA System Manager
 SYMB Symbol (N-FDPS)
 SYN TCP synchronisation message
 SYN SYNchronisation
 SYNBA Synthetische Beanspruchungs- und Arbeitsanalyse (DE) / Synthetic Strain and Task Analysis
 Sync. Synchronous
 SYNT SYNTax
 SYS System Section
 SYS SYStem identifier
 SYS SYstem Services
 SYS/DEG SYStem DEGradation
 SYSCIMIC System-supported Civil/Military Coordination
 SYSCO System controller / Contrôleur système
 SYSCO System-Supported Coordination
 SYSCO Screen-to-Screen Coordination
 SYSEVAL System Evaluation
 SYSID data Source IDentification
 SYSPAR System Parameter
 T Tesla / Terminal
 T Temperature
 T&I Test and Integration
 T-ADLP Trail Airborne Data Link Processor
 T-ATSU Transferring ATS Unit (ICAO)
 T-Channel Time Division Multiple-Access Channel
 T-Connect Transport Connect Service
 T-CSF Thomson - Compagnie Sans Fils
 T-Data Transport Data Service
 T-DPI Target DPI
 T-Gate Transfer Gate (DEVD)
 Page 403
 EUROCONTROL AIRIAL
 Acronym Full form
 T-GCAS Tactical Ground Collision Avoidance System
 T-Unit Transport Connect Service
 t.b.d. To be decided / discussed
 T/B/T Terra/Bordo/Terra (Italian for ground/air/ground)
 T/C Transfer of Control
 T/R Transmit / Receive
 T0 Time 0
 TA Traffic Advisory (Avis de trafic) ACAS
 TA Track Analysis
 TA Transition Action
 TA Target Area
 TA Title Area
 TA Transition Altitude
 TA Task Analysis
 TA Test Area
 TA Terminal Adapter
 TAA Tracker Accuracy Analysis
 TAA Test Access Area
 TAA Terminal Arrival Area
 TAA Track Accuracy Analysis
 TAAM Total Airspace and Airport Modeller (Preston Group, Victoria, Australia)
 TABL Tra-A BLocked ssr codes
 TAC TACan map
 TAC TACtical system (ATFM)
 TAC TACtical air defence radar station
 TAC TACan routes & reporting points
 TACAN Tactical Air Navigation
 TACAN UHF Tactical Air Navigation aid
 TACIS Technical Assistance to the Community of Independent States ( EC )
 TACOT Tactical Operational Tool
 TACOT TACT Automated Command Tool
 TACT TACTical System (old name for ETFMS)
 TACT Tactical Flow Management (working position)
 TAD Telephone Answering Device
 Page 404
 EUROCONTROL AIRIAL
 Acronym Full form
 TAD Test and Development
 TAD Target Audience Description
 TAD Technical Architecture Description
 TADIL Tactical Distribution List
 TAER Terminal Arrival Efficiency Rating
 TAF Aerodrome Forecast
 TAF Terminal Area (Aerodrome) Forecast
 TAFD Total Advanced Flights on Departure
 TAFEI Task Analysis For Error Identification
 TAFT Terminal Airspace Task Force (EUROCONTROL)
 TAG Transitional Airport Group (APATSI)
 TAG Technical Advisory Group
 TAG (ATM) Thematic Advisory Group (ATM) (EASA)
 TAGA Traffic Awareness for General Aviation
 TAI Temps Atomique International
 TAI International Atomic Time
 TAI Tätigkeitsanalyseinventar (DE) / Job-Analysis Inventory
 TAIL TAIL wind
 TALIS Total Information Sharing
 TALK (Swedish) VCS Upgrade Programme / System
 TAM Total Airport Management
 TAM Tivoli Access Manager
 TAM Technical Acknowledgement Message
 TAMP Turkish ATC Modernisation Project
 TANB Tra-A non-Blocked ssr codes
 TAOIT Tribunal Administratif de l'Organisation Internationale du Travail (ILOAT)
 TAP Taxiway Access Point
 TAP Target Acquisition Protocol
 TAP Telematics Application Programme
 TAP Total Average Peak
 TAR Terminal Area (surveillance) Radar
 TAR Terminal Approach Radar
 TAR Tape Archive
 TAR Trials ATN Router
 Page 405
 EUROCONTROL AIRIAL
 Acronym Full form
 TARA Terminal Airspace (or Area) RNAV Applications Task Force
 TARAD Tracking Asynchronous Radar Data
 TARE Telegraphic Automatic Relay Equipment
 TARTAR ATS Route Structure between Armenia, Azerbaijan, Georgia, Iran, Turkey
 TAS Transmission Acknowledgement Sub-field
 TAS True AirSpeed (Knots)
 TAS Traffic Advisory System
 TAS Terminal Airspace
 TASC The Analytical Science Corporation (Industry)
 TASI Time Assigned Speech Interpolation
 TASP Track Acquisition and Support Protocol
 TASS Russian News Agency
 TAT Thematic Apperception Test
 TAT Transputer Anwender Treffen
 TATCA Terminal ATC Automation (FAA)
 TATCI Tallinn ATC Improvement project (Estonia)
 Tau Range / Range rate (TCAS)
 TAU Trunk Access Unit
 Tau (Greek letter, lower case) Symbol for time
 TAWS Terrain Avoidance and Warning System
 TAX TAXi(ing)
 TB Tellback
 TBA To Be Advised
 TBA Tellback Area
 TBBL Tra-B BLocked ssr codes
 TBC To Be Completed
 TBD To Be Determined
 TBD To Be Defined
 TBD To Be Done
 TBD To Be Discussed
 TBM Time-Based Metering
 TBN To Be Notified
 TBNB Tra-B non-Blocked ssr codes
 TBO Trajectory-Based Operations
 Page 406
 EUROCONTROL AIRIAL
 Acronym Full form
 TBS Time-Based Separation
 TBS Telephone Back-up System (VCS)
 TBS-GA Tätigkeitsbewertungssystem - Geistige Arbeit (DE) / Job-Assessment System - Mental Work
 TC Transit Corridor
 TC Temporary Channel
 TC Transition Concept
 TC Technology Centre (from DEVD)
 TC Tactical Controller (radariste)
 TC Transit Counter
 TC Typical Changes
 TC Type Certificate
 TC Number of the ground DTE request
 TC Trajectory Calculation
 TC-APD Tactical Controller Activity Predictor Display
 TC-SA Trajectory Control by ground based Speed Adjustments
 TC/OC Technical Control and Operational Control
 TCA Traffic Count Area
 TCA Track Continuity Area
 TCA Terminal Conflict Alert
 TCA Track-to-chain Association
 TCAA Transatlantic Common Aviation Area
 TCAC Tropical Cyclone Advisory Centre
 TCAM TeleCommunications Access Method
 TCAS Traffic Alert and Collision Avoidance System (Système d'avertissement de trafic et de prévention des
 abordages)
 TCAS Traffic Collision Avoidance System
 TCB Training Coordination Board (EUROCONTROL, IANS)
 TCB Trajectory-based Conflict proBe
 TCC Target Compilation Computer
 TCC Traffic Control Centre
 TCC Thrust Control Computer
 TCC Traffic Coordination Centre
 TCCB TIDE Change Control Board
 TCCS Thrust Control Computer System
 Page 407
 EUROCONTROL AIRIAL
 Acronym Full form
 TCDP Technical Control Data Processor
 TCF Transponder Code Function
 TCF Terrain Clearance Floor
 TCFG Transponder Code Function Group
 TCG Training Consultation Group / Groupe consultatif sur la formation
 TCH Threshold Crossing Height
 TCL Terminal Control
 TCM Trellis Coded Modulation
 TCM Traffic Complexity Manager
 TCM Time Compression Multiplexing
 TCM Time and Clock Management
 TCM Tactical Capacity Manager
 TCO Technical & Coordination Office (EASA-EUROCONTROL)
 TCO Third-Country Operator
 TCO Swedish Confederation of Professional Employees
 TCOP Transfer Coordination Point
 TCP Transmission Control Protocol
 TCP Transport Control Protocol
 TCP Trajectory Change Point
 TCP/IP Transmission Control Protocol / Internet Protocol
 TCPA Time to Closest Point of Approach
 TCPU Touch Panel Central Processing Unit (ACS)
 TCRB Transfer Conflict Resolution Board
 TCS Target Compilation System
 TCS Two Channel Switch
 TCS Test Case Specification
 TCS Type Control Subfield
 TCT Tactical Controller Tool
 TCT Technical Control Terminal
 TCU Towering CUmulus
 TCWP Threshold Crossing Way-point
 TCX Transfer Coordination cancellation message
 TCZ Terminal Charging Zone
 TD Time Difference
 Page 408
 EUROCONTROL AIRIAL
 Acronym Full form
 TD Training Division (IANS) (Division "Formation")
 TD Traffic Demand
 TD Transfer and Delete (KDS input)
 TDA Track Detection Analysis
 TDB Track Data Block
 TDC Top Dead Centre
 TDCE Telephone Distribution and Control Equipment
 TDCP Test Display and Control Panel
 TDD Time Division Duplex
 TDDS Terminal Data Distribution System
 TDF Training and Development Facility
 TDF Total Delayed Flights
 TDH Training Development & Harmonisation (Unit) (IANS) ((Section) "Développement et harmonisation de la
 formation")
 TDHS Time Domain Harmonic Scaling
 TDM Track Dressing Management
 TDM Time Division Multiplexing
 TDM Total Delay in Minutes
 TDMA Time Division Multiple Access
 TDO TornaDO
 TDOA Time Difference of Arrival
 TDOP Time Dilution of Precision
 TDR Traffic Data Record
 TDR Track Drop Rate
 TDR Target Data Receiver
 TDR Time Domain Reflectometer
 TDS Test Design Specification
 TDS Test and Development System
 TDS Tactical Data System
 TDS Test and Development Sector
 TDSP Training Documentations and Special Projects
 TDSU Transport Service Data Unit
 TDWR Terminal Doppler Weather Radar
 TDZ Touchdown Zone
 Page 409
 EUROCONTROL AIRIAL
 Acronym Full form
 TE Terminal Equipment
 TE Transport Entity
 TE Test error
 TE Entry Time
 TE1 Terminal Equipment type [1]
 TE2 Test Error 2
 TE2 Terminal Equipment type [2]
 TE3 Test Error 3
 TEAM SIMUL Team Simulation
 TEB Tender Evaluation Board
 TeB Technical Bodies
 TEC Total Electron Content
 TEC Technical ATM Systems and Logistics Support
 TEC TEChnical: for use only by maintenance personnel
 TECH Technical
 TeCo Technical Coordination Office (EASA-EUROCONTROL)
 TECR TEChnical Reason
 TED Tactical Environment Data
 TED Trajectory Editor
 TEDIS Trade Electronic Data Interchange Systems
 TEI Terminal Equipment Identifier
 TEI Terminal Endpoint Identifier
 TEL Telephone
 TELCO TELephone Central Office
 TELEX TELe-printer EXchange
 TELIA Telecommunications Provider (Swedish)
 TELNET Transmission Control Protocol over Internet Protocol Virtual Terminal Protocol
 TELSACS Telematics for Safety Critical Systems
 TEM Total Energy Model
 TEM Threat and Error Management
 TEMP Test and Evaluation Master Plan
 TEMPEST Transient Electromagnetic Pulse Emanation Standard (US)
 TEMPO TEMPOrary, TEMPOrarily
 TEN Trans-European Network
 Page 410
 EUROCONTROL AIRIAL
 Acronym Full form
 TEN-T Trans-European Transport Network (réseau transeuropéen de transport)
 TEN-T EA Trans-European Transport Network Executive Agency
 TEN-Telecom Trans-European Telecommunications Network
 TEND TEND, TENDing to
 TEPS Trajectory Editor and Problem Solver
 TER Terminal Point (ENV entity type, used in all CHMI)
 TERPROM Terrain Profile Matching
 TERPS Terminal Instrument Procedures
 TES Trials End System
 TESA Toolset For Environmental Sustainability Assessment / Kit d'évaluation de la viabilité environnementale
 test test
 test test
 test test test
 test test
 TEST Test Mode (N-FDPS)
 test test
 TestDB Test Data Base (Lotus Notes)
 TESTLOOP TEST the Link between wpp & imux
 TETRA Trans European Trunk Radio Architecture
 TETRAPOL Trans-European Trunk Radio
 TEWG Training Experts Working Group
 TF Track to a Fix (ARINC 424 Path Terminator)
 TF Task Force
 TF Touch Field (VCS)
 TF-CCC Task Force Common Core Content (EATCHIP).
 TF-TTM TF on Technology Based Training Tools and Methods
 TFA Test Flight Analysis
 TFACS Task Force on Assessment Centre Standards
 TFC TraFfiC
 TFD Tactical Flight Data
 TFD Thin-Film Diode
 TFDATS Delegation of ATS Task Force (ANT)
 TFG Training Focus Group
 TFIS Traffic Flow Investigation System
 Page 411
 EUROCONTROL AIRIAL
 Acronym Full form
 TFL Transfer Flight Level
 TFM Tactical Flight Model
 TFM Traffic Flow Management
 TFMS (FAA) Traffic Flow Management System
 TFMS Technical Facilities and Management Support Section (of ENGD)
 TFR Terrain Following Radar
 TFR Tactical Flight Record
 TFR TransFeR of control message
 TFS Track Flight Store
 TFT Thin-Film Transistor
 TFTR Terrain Following Training Route
 TFTS Terrestrial Flight Telephone System
 TFV Traffic Volume
 TG Task Group
 TGDLP Trials Ground Data Link Processor
 TGF Traffic Growth Factor
 TGL Target Level (N-FDPS)
 TGL Temporary Guidance Leaflet (JAA)
 TGL Touch-and-Go Landing
 TGM Temporary Guidance Material
 TGS Target Generation System
 TGS Taxiing Guidance System
 TGTWNG TarGet ToWiNG
 TGV Train à Grande Vitesse / High Speed Train
 TH Transport Header
 TH-CSF Thomson CSF
 THD Total Harmonic Distortion
 Theta (Greek letter, upper case) Symbol for azimuth
 THP Thrust Horse Power
 THR THermometeR
 THR THReshold
 THRU THRoUgh
 THS Trimmable Horizontal Stabiliser
 THU THUrsday
 Page 412
 EUROCONTROL AIRIAL
 Acronym Full form
 THX Threshold crossing
 TI Transfer Initiation
 TI technologies de l'information (Information Technology - IT)
 TI Transmit Interdict
 TIA Traffic Information Area
 TIARE Traitement des informations ATM et radar pour l'exploitation
 TIB Tactical Agency IT Board
 TIBA Traffic Information Broadcast by Aircraft
 TIBS Telephone Information Briefing System
 TIC Token ring Interface Coupler
 TIC Transition Input Class
 TIC Time In Change
 TICTAC Time Constrained Trajectory Computation Trajectory predictor
 TID Touch Input Device
 TID Test Item Discrepancy
 TIDE Tactical and IFPS Development Environment
 TIDmn Track Initiation Delay Mean
 TIDsd Track Initiation Delay Standard Deviation
 TIF Transport Interface Facility
 TIFF Tagged Image File Format
 TIGA Texas Instruments Graphics Architecture
 TIL unTIL ...
 TIM Transfer Initiation Message
 TIM Tivoli Idendity Manager
 TIM Time
 TIM Technical Interchange Meeting
 TIMERS Traffic Intelligence for the Management of Efficient Runway Scheduling
 TIN Triangulated Irregular Network
 TIO Transmit Interdict Override
 TIOP Tactical and IFPS Operational Platforms
 TIP unTIl Past ... (place)
 TIP Touch Input Panel
 TIP Tactical Instructions Proposal message (OLDI)
 TIRP Technical Incident Reporting Procedure (new ref. STD-CM/PRO/SIMP)
 Page 413
 EUROCONTROL AIRIAL
 Acronym Full form
 TIS TITAN Information Sharing
 TIS Traffic Information Service
 TIS Time to Insert the Sequence
 TIS-B Traffic Information Service - Broadcast
 TITAN Turnaround Integration in Trajectory And Network
 TITLE Message Name
 TIV Traffic Information Volume
 TIXM Terrain Information Exchange Model
 TIZ Traffic Information Zone
 TK True Track
 TKB TracKer Ball pointing device
 TKOF TaKe-OFf
 TKS ThanKS
 TKX Crosstell Tracker
 TL Transition Line (Level)
 TL Traverse Level
 TL Thermo Luminescent
 TLA Terminal Loop Adapter
 TLA Title Line Area
 TLA Top-Level Aggregation
 TLAT Technical Link Assessment Team
 TLD Tactical Load Data
 TLM Telemetric Word
 TLM Traffic Load Monitoring
 TLMA Telematic Access Unit
 TLOF Touchdown and Lift-off Area
 TLOS Target Level of Safety
 TLP Tactical Leadership Program
 TLP Traffic Light Protocol
 TLPD Traffic Load Prediction Device
 TLPV Tratamiento Local de Planes de Vuelo (ES)
 TLS Transponder Landing System
 TLS Tactical Load Smoother
 TLS Transport Layer Security
 Page 414
 EUROCONTROL AIRIAL
 Acronym Full form
 TLS Target Level of Safety
 TLS Tolerable Level of Safety (Niveau tolérable de sécurité)
 TLU Taxi for Line Up
 TLV Type Length Value
 TLX Task Load Index (NAA)
 TLXAU Telex Access Unit
 TM Technical Project Manager
 TM Technical Manual
 TM Training Manager
 TMA Terminal Manoeuvring Area
 TMA Terminal Control Area
 TMA Telecommunications Managers Association
 TMA-TC TMA Tactical Controller
 TMA2000+ Trajectory Management Applications
 TMAN Traffic Manager
 TMAS Terminal Manoeuvring Area Services
 TMC Telematics Management Committee
 TMC Technical Monitoring and Control
 TMCD Technical Monitoring & Control Desk
 TMCS Technical Monitoring and Control System (RMCDE / MADAP)
 TMCU Tower Main CWP Unit
 TMF Trajectory Management Framework
 TMG Track Made Good
 TMLLF Terrain Masking Low-Level Flight computer (A 400 M)
 TMN Telecommunications Management Network
 TMP Teleprinter MultiPlexer
 TMR Trajectory Management Requirements
 TMRR Temporary Minimum Disk Route
 TMS Traffic Management System
 TMS TeleManagement System
 TMS Tools Manager Server
 TMSSG Top Management Structure Sub-Group
 TMT Technical Monitoring Team (old name for CSO)
 TMU Total Vertical Error Monitoring Unit
 Page 415
 EUROCONTROL AIRIAL
 Acronym Full form
 TMU Traffic Management Unit (FAA)
 TMV Traffic Monitor Value
 TMZ Transponder Mandatory Zone
 TN Track Number
 TN Tunisia (ISO Countries Codes)
 TN Technical Note
 TN True Negative
 TN Trajectory Negociation
 TNA TurN Altitude
 TNAV Time Navigation
 TNC Tactical Network Coordinator
 TNC Terminal Navigation Charge
 TNG The Next Generation
 TNH TurN Height
 TNM Tactical Network Management
 TNMC Tactical Network Management Coordinator
 TNO Stereovision test (trade name)
 TNR non-radar TraNsfeR of control message
 TO Time Over
 TO Operation Time
 TO Technical Order
 TO Telecommunications Operator
 TO RIT To Reroute Issue Time
 TO/GA Take-Off/Go Around
 TO/L take-off/Landing
 TO_RIT To Reroute Issue Time
 TOA Terms of Agreement
 TOA Time of Arrival
 TOAST Technical Operations And Systems Tests (MAS Eng. Div.Team)
 TOAST Team Oriented ATC Simulator Training
 TOBT Target Off-Block Time
 TOC Transfer of Communication
 TOC Top of Climb
 TOC ATC take-off clearance
 Page 416
 EUROCONTROL AIRIAL
 Acronym Full form
 TOC Traffic Observation Center
 TOC Technical Operators Centre
 TOC Transfer Of Control
 TOCS Take-Off Climb Surface
 TOD Terrain and Obstacle Data
 TOD Time Of Day
 TOD Top Of Descent
 TODA Take-Off Distance Available (ICAO)
 TODWG Terrain and Obstacle Data Working Group
 TOEFL Test Of English as a Foreign Language
 TOFT Take-off time
 TOGA Take-Off Go Around
 TOGAF The Open Group Architecture Framework
 TOI Temporary Operational Instruction
 TOIT/TF Task Force on the Treatment Of Internal Tax (Équipe spéciale sur le régime appliqué à l'impôt interne)
 TOKAI Toolkit for ATM Occurrence Investigation / boîte à outils pour l'analyse des événements impliquant l'ATM
 TOP Total Operations Planner
 TOP Technical & Office Protocols
 TOP cloud TOP
 TOP The TOP Object Class, containing no attributes
 TOPL Take-off Performance Limits
 TOR Terms of Reference
 TORA Take-Off Run Available
 TORCH Technical, Economical and Operational Assessment of an ATM Concept Achievable from the Year 2005
 TOS Traffic Orientation Scheme / Schéma d'orientation du trafic
 TOS Take-Off Safety (Airbus)
 ToS Type of Service
 TOS Tape Operating System
 TOSCA Testing Operational Scenarios for Concepts in ATM
 TOT Time Over Target
 TOT Take-Off Time
 TOW Time Of the Week
 TOW Take-off Weight
 TOWP Take-off Waypoint
 Page 417
 EUROCONTROL AIRIAL
 Acronym Full form
 TP Trajectory Predicition (N-FDPS)
 TP Transaction Processing
 TP Trajectory Predictor
 TP True Positive
 TP Trajectory Prediction
 TP Technical Prospectus
 TP Terminal Procedure
 TP Transport Protocol
 TP Turning Point
 TP-4 Transport Protocol, class 4
 TP0 Transport Protocol - Class 0
 TP4 Transport Protocol - Class 4
 TPAS Trajectory Predictor based Aircraft Simulator
 TPB Propagation backward delay
 TPD TaPe Drive
 TPD Transition Programme Description (EATMS)
 TPD Tabular Problem Display (N-FDPS)
 TPDR Transponder (abbreviated term)
 TPDU Transport Protocol Data Unit (RMCDE)
 TPF Propagation forward delay
 TPF Technology Performance Financing
 TPG The Preston Group
 TPI Traffic Prediction Improvements
 TPI Threads Per Inch
 TPIAS Transition Plan for Implementation of Airspace Strategy
 TPIC Transition Plan for Implementation of CUAC
 TPINS Transition Plan for the Implementation of the ECAC Navigation Strategy
 TPL Transport Layer
 TPL Task Priority List
 TPM Transaction Processing Monitor
 TPS Test Procedure Specification
 TPS Transaction Processing System
 TPS Mono-radar track format
 TPT Touchdown Point
 Page 418
 EUROCONTROL AIRIAL
 Acronym Full form
 TQ Technical Query (N-FDPS)
 TQL Transmit Quality Level
 TQL Tool Qualification Level
 TQM Total Quality Management
 TR Track Reconstruction
 TR Track (ICAO)
 TR Trouble Report
 TR TRansfer phase
 TR Token Ring
 TR Test Report
 TR Transmit / Receive (duplexer)
 TR Release time
 TR Technical Requirement
 TR Transfer Retain
 TRA Temporary Reserved Area (Military Reserved Airspace)
 TRA Technical Risk Assessment
 TRA Token Ring Adapter
 TRA Required Time for Arrival
 TRA Track Resolution Analysis
 TRA Temporary Reserved Airspace (ICAO 8400/4)
 TRA TRAnsistor
 TRA Traffic (type)
 TRACECA Transport Corridor Europe Caucasus Asia
 TRACER Technique for the Retrospective Analysis of Cognitive Errors in ATM
 TRACON Terminal Radar Approach Control (US)
 TRACT TRajectory Adjustment through Constraint of Time
 TRADIS Traffic Display (ARTAS)
 TRAFCA Traitement Automatique des Fonctions de la Circulation Aérienne (Algeria)
 TRAINDEV2 Integrated EUROCONTROL Training Design Tool
 TRAMON Traffic Monitoring
 TRAMS Transition to Mode S
 TRAN TRaffic ANalysis
 TRANS TRANSmitter, TRANSmits
 TRANSCOM French public telecommunication network
 Page 419
 EUROCONTROL AIRIAL
 Acronym Full form
 TRANSEC Transmission Security
 TRANSFER TRANSFER an SPN to the EC of an adjacent sector
 TRAP Technical Review and Audit Plan (ODS)
 TRAP Trier Remote Air Picture
 TRASAS Trans-Regional Airspace and Supporting ATM Systems Steering Group (Groupe directeur sur l'espace aérien
 transrégional et l'ATM de soutien)
 TRB Tracker Ball
 TRB Tender Review Board
 TRB Transportation Research Board (4-States)
 TRC Tracing Component (Subsystem of BSC)
 TRC Traffic Count
 TRD Trials, Research and Development (Mode S Stations)
 TRD Transit Routing Domain
 TRD Transfer Document
 TRD Transit Routing Domain
 TREE Transit Radiation effects on Electronic Equipment
 TREN Transport and Energy (Directorate-General, European Commission)
 TREND Landing Forecast
 TRES Trajectory Reconstruction and Evaluation Suite
 TRF TRansFormer
 TRF Total Regulated Flights
 TRF Tuned Radio Frequency
 TRG Training
 TRG Technical Review Group
 TRG/SRI TRaininG / System Replay & Investigation environment
 TRGP TRaininG Plan
 TRIP Trade Related Intellectual Property
 TRK Tracker (Software)
 TRK TRacK
 TRKBRT TRacK BRighT
 TRL Transition Level
 TRL Technology Readiness Level
 TRL TRa for Lower airspace sectors
 TRM Team Resource Management (gestion des ressources d'équipe)
 Page 420
 EUROCONTROL AIRIAL
 Acronym Full form
 TRM Token Ring Multiplexer
 TRMM Token Ring Management Module
 TRMTFII Team Resource Management Task Force II
 TRN Terrain Reference Navigation
 TROL Tapeless, Rotorless On Line
 TROP TROPopause
 TRP Thrust Rating Panel
 TRP True Revision Process
 TRR Traffic Regulated Rate
 TRR Test Readiness Review (MAS - ODS)
 TRS Task Requirement Sheet
 TRS Time to Remove from Sequence
 TRS Transmission Rate Subfield
 TRSB Time Reference Scanning Beam (MLS)
 TRSS Token Ring Sub-System
 TRU TRa for Upper airspace sectors
 TRUST Terminal Routes Using Speed-Control Techniques (MITRE, CAASD)
 TRX TRansmitter
 TRY/PFL Try Input of Planned Flight Level
 TS Test Specification (ODS)
 TS Trajectory System
 TS Transport Service User
 TS Technical Supplement
 TS Terminating System
 TS Time Source
 TS Transport Service
 TS Track Server (MADAP)
 TS Technical Specification
 TS Tracker (Hardware)
 TS Starting and Stopping time
 TS Traffic Synchronisation
 TS ThunderStorm
 TSA Temporary Segregated Area
 TSA Traffic Situation Awareness (ASAS application)
 Page 421
 EUROCONTROL AIRIAL
 Acronym Full form
 TSA Technical Support Administrator
 TSA Time Stamp Area
 TSAF Transparent Services Access Facility
 TSAP Transport Service Access Point
 TSAT Target Start-Up Approval Time
 TSC Technical Surveillance Complex
 TSCU Tower Support CWP Unit
 TSD Time Sequence Diagram
 TSD Traffic Situation Display (FREER)
 TSDD Test Synthetic Dynamic Display
 TSDF Time Slot Duty Factor
 TSDG Technical and System Development Group
 TSDU Transport Service Data Unit
 TSE Total System Error
 TSEA Track Systematic Error Analysis
 TSEL Transport Selector
 TSG Training Sub-Group
 TSG Technical Sub-Group
 TSGE Tri-Service Group on Communications and Electronics (NATO)
 TSGR ThunderStorm with hail
 TSI Time slots interchanges
 TSIKADA Russian four-satellite civil navigation system.
 TSIKADA_M Russian six-satellite military navigation system.
 Tsimul Team Simulation
 TSO Technical Service Order
 TSO Technical Standards Order (FAA)
 TSO Time Sharing Option
 TSP Traffic Sequence Planning
 TSP TranSPonder
 TSP Track Support Protocol
 TSr Track Swap Rate
 TSR Terminate & Stay Resident
 TSR Terminal Surveillance Radar
 TSRV Transport System Research Vehicle
 Page 422
 EUROCONTROL AIRIAL
 Acronym Full form
 TSS Traffic Sub-System
 TSS Target Software Server
 TSSA ThunderStorm with SAnd or dust storm
 TSSD Turnaround Service Sequence Diagram
 TSSDU Typed SSDU data
 TST TeST & acceptance flights
 TST Trajectory Support Tool
 TST Test
 TSTMS Thunderstorms
 TSU Transmission Selection Unit
 TSU Technical Support Unit
 TSWP Technical Surveillance Working Position
 TT TeleType(writer)
 TT True Track
 TT&C Telemetry, Tracking and Commanding
 TTA Track Time-based Analysis
 TTA Tactical Training Area
 TTA Target Time of Arrival
 TTA Target time of Arrival
 TTC Telemetry and Telecommand Centre
 TTCN Table and Tree Combined Notation
 TTD Target Time of Departure
 TTE Transport, Telecommunications and Energy Council (EU)
 TTF Total Flights
 TTG Time To Go
 TTL Technical Team Leader
 TTL Time To Live
 TTL Transistor-Transistor Logic
 TTLEET Total Estimated Elapsed Time
 TTO Target Time Over
 TTOT Target take-off Time
 TTP Telephone Twisted Pair
 TTP TCAS II Transition Program
 TTP Turn-To-Point
 Page 423
 EUROCONTROL AIRIAL
 Acronym Full form
 TTR Type of TranspondeR
 TTR Target Tracking Radar
 TTR Test and Training Room
 TTS Transaction Tracking System
 TTS Trials Transport Service
 TTSV Training SuperVisor
 TTW Through The Wall
 TTY Teletypewriter (Telex)
 TTY TeleTYpe (ADMAR), Teletype device
 TU Temps Universel
 TU Turkey (ISO Country Code)
 TU Tributary Unit
 TUC Temps Universel Coordonné / Universal Coordinated Time (heure ZOULOU)
 TUC Time of Useful Consciousness
 TUE TUEsday
 TUEM Trade Union EUROCONTROL Maastricht
 TUG Tributary Unit Group
 TUM Time Update Message
 TURB TURBulence
 TurnRPP Turnaround Resilience, Performance and Prediction
 Tut Tutoring
 TV Television
 TV Traffic Volumes
 Tv-Tc Transversal acceleration - Typical changes
 TVE Total Vertical Error
 TVOR Terminal VOR
 TW Target Window
 TW (TWK) TeamWork Design Tool
 TWA Two-Way Alternate
 TWDL Two-Way DataLink
 TWF Temporary Work Force
 TWG Tide Working Group
 TWG Training Working Group
 TWI Terminal Weather Information
 Page 424
 EUROCONTROL AIRIAL
 Acronym Full form
 TWIP Terminal Weather Information for Pilots
 TWN Tactical Weather Network
 TWP Technical Work Programme in the Air Navigation Field (ICAO)
 TWP Transition Way Point (Eurofighter)
 TWR Tower Control Unit (Aerodrome Control Tower)
 TWR Tower
 TWS Track While Scan
 TWS Technical Watch Supervisor
 TWS Terminal Weather Service (ICAO)
 TWS Two-Way Simultaneous
 TWT Travelling Wave Tube
 TWX Tele-typeWriter eXchange
 TWY TaxiWaY
 TWYL TaxiWaY Link
 TX Transmitter Station
 TX Transmit
 TX Transmission, Transmit(ter)
 Tx Next waypoint ETA
 TX / RX Transmitter / Receiver (Radar head)
 TX1 Dynamic TeXt 1
 TX2 Dynamic TeXt 2
 TXI taxi-in
 TXIT Target Taxi-In Time
 TXO Taxi-out
 TXOT Target Taxi-Out Time
 TXT TeXT (of SDD Labels)
 Txt Text
 TXWY Taxy Way
 TYP Type of aircraft
 TYP/ Type of aircraft (Type d'aéronef)
 TYPE Aircraft Type
 TYPH TYPHoon
 U UHF Equipped
 U & D Uplink & Downlink
 Page 425
 EUROCONTROL AIRIAL
 Acronym Full form
 U-BIN Up Broadcast Identifier Number
 U-Space Urban Space (operating area for RPAS)
 U/L Upper / Lower - Upper Link
 U/S Unserviceable
 U/V Ultra Violet
 UA User Agent
 UA Ukraine (ISO Countries Codes)
 UA Unnumbered Acknowledgement
 UAB Until Advised By ...
 UAB Unable (N-FDPS)
 UAC User Agent Client
 UAC Upper Area Control Centre (centre de contrôle de l'espace aérien supérieur)
 UAC Unbalanced Asynchronous mode Class
 UAE Unrecoverable Application Error
 UAE User Agent Entity
 UAM Urban Air Mobility (mobilité aérienne en milieu urbain)
 UAP User Application Profile (RMCDE)
 UAP Upper Airspace Project
 UAPDU User Agent Protocol Data Unit
 UAR Upper Air Route
 UART Universal Asynchronous Receiver / Transmitter
 UAS User Agent Server
 UAS Unmanned Aircraft System (aéronef sans pilote)
 UAS Upper Airspace
 UAT Universal Access Transceiver
 UAV Unmanned Aerial Vehicle (Véhicule aérien sans pilote)
 UAV-OAT TF UAV-OAT Task Force
 UBR Unspecified Bit Rate
 UBSS Unix-Based System Software
 UC Unified Communications
 UCA Use Case Analysis
 UCAV Unmanned Combat Air Vehicle
 UCD Use Case Design
 UCDU Universal Control and Display Unit
 Page 426
 EUROCONTROL AIRIAL
 Acronym Full form
 UCE Unité de contrôle espace
 UCO Universal Communications Object
 UCP Unit Centre Point
 UCS Uniform Chromaticity Scale
 UCS Unit Competency Scheme
 UD User Data
 UDA Upper Advisory (Service) Area
 UDC Universal Decimal Classification
 UDDI Universal Description, Discovery and Integration
 UDF Ultra High Frequency Direction Finding Station
 UDF User Defined Function
 UDOP User Defined Operational Picture
 UDP User Datagram Protocol
 UDPP User-Driven Prioritisation Process
 UDR Uplink Data Rate
 UDRE User Differential Range Error
 UE Union européenne (European Union - EU)
 UE Union européenne (European Union - UE)
 UE Union européenne (European Union - EU)
 UE Union européenne
 UE Union européenne (European Union - EU)
 UEATMS Uniform European Air Traffic Management System
 UELM Uplink Extended Length Message
 UEO Union de l'Europe Occidentale / Western European Union (=WEU)
 UERE User Equivalent Range Error
 UF Uplink Format
 UFF Ultimate Fallback Facility
 UFMC Unemployment Fund Management Committee (comité de gestion du Fonds social pour le non-emploi)
 UFN Until Further Notice
 UFO Unidentified Flying Object
 UFR Upper Flight Region
 UFS Ultimate Fallback System
 UHDT Unable Higher Due to Traffic
 UHF Ultra-High Frequency
 Page 427
 EUROCONTROL AIRIAL
 Acronym Full form
 UHT Ultra Heat Treated
 UI User Interface
 UI Unnumbered Information
 UIC Unit Identity Code
 UIC Upper Information Centre
 UID User Identification
 UIECS Union of International and European Civil Servants
 UIMS User Interface Management System
 UIR Upper Flight Information Region / Région supérieure d'information de vol
 UIT Union Internationale des Télécommunications (FR)
 UIVE User Ionospheric Vertical Range
 UJT Uni-Junction Transistor
 UK United Kingdom (but ISO code=GB)
 UKAATS UK Advanced ATS
 UKD Upgrade ZKSD and coupling with DERD-X (DE)
 UKFSC United Kingdom Flight Safety Committee
 UKNATS United Kingdom National Air Traffic Services
 Ukraviatsia Ukrainian State Aviation Administration
 UkSATSE Ukrainian State Air Traffic Services Enterprise
 UKW Ultrakurzwelle (DE) / Ultra-Short Wave / Onde ultra-courte (FR)
 UL Upper Link (ATS route indication) or Uplink
 ULA Upper Layer Architecture
 ULB Underwater Locator Beacon
 ULC Urz�d Lotnictwa Cywilnego = Civil Aviation Office (Poland)
 ULM Ultra Léger Motorisé (FR)
 ULR Ultra Long Range
 ULS Ultra-Large Scale
 UM Utility Message (bits)
 UM Uniform Motion
 UM Uplink Message
 UMA Unmanned Aircraft
 UMAS UnManaged AirSpace
 UMB Upper Memory Block(s)
 UML Unified Modelling Language
 Page 428
 EUROCONTROL AIRIAL
 Acronym Full form
 UMPDU User Message Protocol Data Unit
 UMTS Universal Mobile Telephone Service
 UMTS Universal Mobile Telecommunications System
 UMTS Universal Mobile Telephone System
 UN United Nations
 UN Unassigned
 UN CTED United Nations Counter-Terrorism Committee Executive Directorate
 UNA UNAble
 UNAP UNable to APprove
 UNAS Universal Network Architecture Services
 UNC UNassoCiated sarp mum/ccs/cnl
 UNC UNified, Coarse
 UNC UNbalanCed normal response mode
 UNF UNified, Fine
 UNFCCC United Nations Framework Convention on Climate Change
 UNHCR United Nations High Commissioner for Refugees
 UNI User-to-Network Interface
 UNIN Unsual / Emergency Situations
 UNINC Unusual Incidents
 UNITE Unification of accounts and marginal costs for Transport Efficiency
 UNIX UNIX O/S
 UNIX Uniplexed Information and Computing Service
 UNK UNrecognisable (SARP) message.
 UNL Unlimited
 UNMA Unified Network Management Architecture
 UNMIK United Nations Interim Administration Mission in Kosovo (UNSCR 1244)
 UNO United Nations Organisation
 UNREL UNRELiable
 UNT Until
 UNWTO UN World Tourism Organization
 UOD User Objectives Document
 UP4DT User Preferred 4D Trajectory
 UPC Usage Parameter Control
 UPD UPDate (plan divergence)
 Page 429
 EUROCONTROL AIRIAL
 Acronym Full form
 UPD Update Plan Divergence
 UPDM Unified Profile for DoDAF/MODAF
 UPP Upper airspace
 UPP User-Pays Principle (principe de l'utilisateur-payeur)
 UPR User Preferred Route
 UPS Uninterruptible Power Supply
 UPS United Parcel Service
 UPS-AT United Parcel Services
 UPSEL Update Selection
 UPT User Preferred Trajectory
 UPU Universal Postal Union (UN)
 UPU Union Postale Universelle (ONU)
 UR/R User Requirements Review
 URA User Range Accuracy
 URANIA Upgrading Athens Terminal Area and Interfacing to the PALLAS ACC system
 URD User Requirements Document
 URE User Range Error
 URET User Request Evaluation Tool (MITRE Conflict Detection product)
 URG Urgent
 URG Urgency (ICAO)
 URI Uniform Resource Identifier
 URL Uniform Resource Locator
 URL Internet Web-Site Address
 URP User Requirements Phase
 URR User Requirements Review
 URS User Requirements Section
 URSF Universal Remote Support Facility
 URTF User Requirements Task Force
 US Unit Separator
 US United States
 USA Unix System Administrator
 USA United States of America
 USAF United States Air Force
 USAL User Access Level
 Page 430
 EUROCONTROL AIRIAL
 Acronym Full form
 USAP Universal Security Audit Programme
 USAREUR US Army (Representative) in Europe
 USART Universal Synchronous / Asynchronous Receiver/Transmitter
 USC Unit Safety Case
 USCG United States Coast Guard
 USD US Dollar
 USEF Union Syndicale EUROCONTROL France (FR)
 USERID User Identification
 USFSPEI Union Syndicale Fédérale du Service Public Européen et International
 USG US Government
 USGS US Geological Survey
 USiT Undetected Simultaneous Transmission
 USLM Uplink Standard Length Message
 USNO United States Naval Observatory
 USOAP Universal Safety Oversight Audit Programme (Programme universel d'audits de supervision de la sécurité -
 ICAO)
 USRA Upper Search & Rescue Area
 USRA Upper airspace Special Rules Area
 USS Update Synchronization System
 USSPE Union Syndicale - Service public européen / European Public Service Union (=EPSU)
 USSR Union of Soviet Socialist Republics
 UT Unit (ENV entity type, unit is a generic concept comprising all units providing and/or receiving a service or
 information, used in all CHMI)
 UT Universal Time
 UTA Upper (Traffic) Control Area
 UTA Upper Transition Area
 UTC Coordinated Universal Time
 UTF Unicode Transformation Format
 UTM UAS Traffic Management
 UTM Universal Transverse Mercator
 UTP Unit Training Plan - Plan de formation de l'unité
 UTP Unshielded Twisted Pair
 UUID universally unique identifier
 UUP Updated (Airspace) Use Plan
 UUS User-to-User Signalling
 Page 431
 EUROCONTROL AIRIAL
 Acronym Full form
 UVA Utility Value Analysis
 UVSCT madap System Configuration Table
 UWB Ultra Wide Band
 UX UNIX
 V Speed of Light
 V Volt
 V&V Validation & Verification
 V-NAV Vertical Navigation
 V-PAT Vertical flight path analysis
 V/D Voice/Data
 V/M Volts-per-meter
 V/S Vertical Speed
 V/STOL Vertical or Short Take-Off and Landing
 V4 V4 (ARTAS version)
 V6 Version 6B (ARTAS including Mode S ELS)
 V6B Version 6B (ARTAS for ELE)
 V7 ARTAS Version 7 (includes EHS and ADS-B)
 VA Heading to an Altitude (ARINC 424 Path Terminator)
 VAA Value Added Applications (MADAP)
 VAA Volcanic Ash Advisory (message)
 VAAC Volcanic Ash Advisory Centre
 VAC Alternate Current Voltage
 VAC Violation Conflict Alert
 VAC Visual Approach Chart
 VACP Volcanic Ash Contingency Plan
 VAD Voice Activity Detection
 VAD Vertical Azimuth Display
 VADS Value-Added Data Network Service
 VAFB Vandenberg Air Force Base
 VAFOR Very Advanced Flight Data Processing System Operational Requirements
 VAFORIT VAFOR Implementation
 VAGI Visual Approach Guidance Indicator
 VAL in VALleys
 VAL Visual Approach & Landing
 Page 432
 EUROCONTROL AIRIAL
 Acronym Full form
 VAL Vertical Alert Limit
 ValFor Validation User Group
 VAN Runway control vehicle
 VAN Value-Added Network
 VAP Value Added Process
 VAP Visual Aids Panel (ICAO)
 VAP Volumetric Airspace Profile
 VAP Volumetric Airspace Penetration
 VAPORETO Validation Process for Overall Requirements in (air) Traffic Operation
 VAPS Virtual Applications Programming Software
 VAPS Visual Approaches
 VAQ VHF Avionics Qualification
 VAR VCS, Ancillaries and Remote control system
 VAR VARactor
 VAR Variable FIM (N-FDPS)
 VAR Variation
 VAR Value Added Reseller
 VAR Visual Aural Radio range
 VAR magnetic VARiation
 VAS Vortex Advisory System
 VAS Vienna ATCC Data Processing System
 VASI Visual Approach Slope Indicator
 VASIS Visual Approach Slope Indicator System
 VAT Value-Added Tax
 VATSIM Virtual Air Traffic Simulation network
 VAW Vertical Aid Window (N-FDPS)
 VAW Vertical Assistance Window (ODID)
 VBC Vertical Binary Check
 VBR Variable Bit Rate
 VBS Video Blanking Sync
 VBX Visual Basic Extensions
 VC Virtual Classroom
 VC Virtual Circuit
 VC Voice Communication
 Page 433
 EUROCONTROL AIRIAL
 Acronym Full form
 VC Virtual Call
 VC-31 Virtual Container-31
 VC-32 Virtual Container-32
 VC-4 Virtual Container-4
 VCC Virtual Channel Connection
 VCCS Voice Communication (and) Control System
 VCI Virtual Channel Identifier
 VCI Voice Change Instruction (CPDLC)
 VCI Virtual Circuit Identifier
 VCNA Vtam Communications Network Application
 VCO Voltage Controlled Oscillator
 VCPI Virtual Control Programme Interface
 VCR Video Cassette Recorder
 VCR Visual Control Room
 VCRI Verification Cross Reference Index (ODS)
 VCS Voice Communication System
 VCS voice channel spacing
 VCS-TF Voice Communication Systems Task Force
 VCSS Voice Communications Switching System
 VCSTF Voice Communications System Specification Task Force
 VCXO Voltage Controlled Crystal Oscillator
 VCY ViCinitY
 VD Heading to a DME Distance (ARINC 424 Path Terminator)
 VD Vertical Dispersal
 VDB VHF Data Broadcasting
 VDC Direct Current Voltage
 VDD Version Description Document
 VDE Verband Deutscher Elektrotechniker (DE)
 VDEV Vertical Deviation
 VDF VHF Direction Finder
 VDI Vertical Deviation Indicator
 VDL Voice Data Link
 VDL VHF Digital/Data Link / Liaison de données VHF
 VDL/4 VHF Voice and Data Link - Mode 4
 Page 434
 EUROCONTROL AIRIAL
 Acronym Full form
 VDLMode2 VHF Data Link Mode 2 (Liaison de données VHF Mode 2)
 VDLMode4 VHF Data Link Mode 4 (Liaison de données VHF Mode 4)
 VDOP Vertical Dilution of Precision
 VDPG Validation Plan Drafting Group
 VDR Voltage Dependent Resistor
 VDR Validation Data Repository
 VDR VHF Digital/Data Radio
 VDR Validation Data Repository (Gisement de données de validation)
 VDS Voice Distribution System
 VDT Video Display Terminal
 VDU Visual Distribution Unit
 VDU Video Display Unit
 VDX Videotext
 VE Validation Environment
 VEB Variable Elevation Beam
 VeFC Vertical Motion Fast Climb
 VeFD Vertical Motion Fast Descend
 VEIRT Versatile Environmental Impact Reporting Tool
 VEL Velocity Leader
 VEL VELocity
 VENSIM Ventana Simulator
 Ver Vertical
 VER VERsion identifier
 VERA VERification (of horizontal separation) and Advice (to other controllers)
 VERACO madap value added VERA Communication Object
 VERT Vertical
 VESA Video Electronics Standards Association
 VESDA Very Early Smoke Detection Apparatus (Fire alarm system)
 VET Visualisateur Electronique de Texte
 VEX Video Extension to X (Windows)
 VEX Vertical Expansion (of 8.33 kHz deployment)
 VF Validation Framework
 VF Voice Frequency
 VFG Validation Focus Group (CASCADE)
 Page 435
 EUROCONTROL AIRIAL
 Acronym Full form
 VFG Visual Flight Guide
 VFO Variable Frequency Oscillator
 VFOP Visual Flight Rules Operations Panel
 VFR Visual Flight Rules (règles de vol à vue)
 VG Vertical Gyro
 VG Validity Generalisation
 VGA Variable Geometric Area
 VGA Video Graphics Array
 VGS VHF Datalink Ground Stations
 VHC Very High Capacity
 VHCn Very High Capacity needs
 VHF Very High Frequency / Très hautes fréquences (30 - 300 MHz)
 VHF R/T Very High Frequency Radio/Telephony
 VHF-OTF VHF Operations Task Force
 VHFAMS Very High Frequency Aeronautical Mobile Services
 VHLM Very High Level Management
 VHS Video Home System
 VHZ Vereinigte Hauptzentrale (DE)
 VI Heading to Intercept (ARINC 424 Path Terminator)
 VI Voice Interface
 VIA by way of ...
 VIA Versatile Interface Adapter
 VICTOR Visualización Integrada de Control de Torre (ES) / ATC Integrated display for TWR
 Vid Video
 VID Visual Image Display
 VIF validation infrastructure
 VIM Vendor Independent Messaging (interface)
 VIP Very Important Person
 VIP Very Light Jet Integration Platform
 VIS VISibility
 Vis Visit
 Vis Visual aids
 VIS1 Visibility Condition 1 (A-SMGCS)
 VIS2 Visibility Condition 2 (A-SMGCS)
 Page 436
 EUROCONTROL AIRIAL
 Acronym Full form
 VIS3 Visibility Condition 3 (A-SMGCS)
 VIS4 Visibility Condition 4 (A-SMGCS)
 VISAID Visual Landing Aid
 VIT voluntary intervention team
 VIVO Visualisation des Vols Oceaniques
 VKS Military Space Forces
 VL Very Low ATC Complexity
 VLAN Virtual Local Area Network
 VLBI Very Long Baseline Interferometry
 VLCT Very Large Capacity Transport
 VLD Very Large-Scale Demonstrations (démonstrations à très grande échelle)
 VLF Very Low Frequency
 VLF Very Low Frequency
 VLJ Very Light Jets
 VLL Very Low Level (RPAS category)
 VLMC Virtual Link Management Channel
 VLMF Very Low frequency Magnetic Field
 VLOS visual line of sight
 VLR Very Long Range
 VLR Visited Location Register
 VLR Very Light Rotorcraft
 VLS Voice Logging System
 VLSI Very Large Scale Integration
 VLUT Video Look-Up Table
 VM Heading to a Manual Termination (ARINC 424 Path Terminator)
 VM Virtual Machine
 VM Voice Messaging
 VMC Visual Meteorological Conditions
 VMD Video Motion Detector
 VME VDL Management Entity
 VMMS Vhf Multi-frequency Management System
 Vmo Maximum operating limit speed
 VMS Voice Messaging Service
 VN Valid Negatives
 Page 437
 EUROCONTROL AIRIAL
 Acronym Full form
 VNAV Vertical Navigation
 VNCA Vtam Node Control Application
 VNSE Vertical Navigation System Error
 VOB Versioned Object Base
 vocoder voice coder
 VOCODER Voice Coder Decoder
 VOI Volume of Operational Interest
 VoIP Voice over Internet Protocol
 VOL Volume
 VoL Value of Life
 VOLCEX ICAO volcanic ash exercises
 VOLMET Routine voice broadcasts of MET information for aircraft in flight
 VOR Very High Frequency Omnidirectional Radio Range (ICAO 8400/4)
 VOR-A Very High Frequency Omnidirectional Range Station Circling Approach
 VOR-TACAN Combined VOR and TACAN
 VOR/DME VHF Omni-directional Ranging / Distance Measurement Equipment
 VORTAC Combined VOR and TACAN
 VOSL Value of Statistical Life
 VOT VOr airborne equipment Test facility
 VOT VHF Omnidirectional Range Test
 VP Vertical Profile
 VP Virtual Path
 VP Valid Positives
 VPA Variable Profile Area
 VPAE Vertical Profile Angle Error
 VPC Virtual Path Connection
 VPD Vertical Polar Diagram
 VPDG Validation Plan Drafting Group
 VPE Vertical Position Error
 VPI Virtual Path Identifier
 VPIP Vertical Intercept Point
 VPL Vertical Protection Level
 VPN Virtual Private Network
 VPOL Vertical Polarisation
 Page 438
 EUROCONTROL AIRIAL
 Acronym Full form
 VPP Vertical Pressure Profile
 VPT Virtual Path Termination
 VQL Visual Query Language
 VQL Variable Quantising Level
 VR Heading to a VOR Radial (ARINC 424 Path Terminator)
 VRAM Video RAM
 VRB VaRiaBle
 VRC Vertical Rate of Change
 VRC View Reference Coordinates
 VRC Vertical Rate of Change (N-FDPS)
 VRC Vertical Redundancy Check
 Vref Threshold speed
 VRNP Vertical Required Navigation Performance
 VRRS Voice Recording and Display System
 VRS Voice Response System
 VS Traffic Volume Sets
 VS Vertical Status
 VS Vocational Stabilisation
 VS Virtual Storage
 VSA Visual Separation on Approach
 VSA by ViSuAl reference to the ground
 VSAM Virtual Storage Access Method
 VSAT Very Small Aperture Terminal
 VSBY Visibilty
 VSCS Voice Switching and Control System
 VSD Vision and Strategy Document (EATMS)
 VSE Virtual Storage Extended
 VSG Validation Sub-Group
 VSI Validation Support Interface
 VSI Vertical Speed Indicator
 VSIG Vertical Separation Implementation Group
 Vsl Visual Aids
 VSL Vertical Stack List
 VSM Vertical Separation Minimum
 Page 439
 EUROCONTROL AIRIAL
 Acronym Full form
 VSM Vertical Separation Monitoring
 VSP Variable System Parameters (N-FDPS)
 VSP Vertical SPeed
 VSP Variable System Parameter
 VSS VDL Specific Services
 VSSG Vertical Separation Sub-Group
 VSWR Voltage Standing Wave Ratio
 VT VerTical
 VT Virtual Terminal
 VT Vertical Tabulation
 VTAM Virtual Telecommunications Access Method
 VTM Vacuum Tube voltMeter
 VTMS Voice Text Message System
 VTN Voice Telecommunications Network
 VTOL Vertical Take-Off and Landing
 VTP Virtual Terminal
 VTS Vessel Traffic Services
 VTT Vertical Threshold Test
 VTT Variable Taxi Time
 VV Verification & Validation
 VV&T Verification, Validation & Testing
 VVCO Vertical View Communication Object
 VVD Vertical View Display
 VVIEW Vertical VIEW
 VVP Volume Velocity Processing
 VWF Video For Windows
 VWS Vertical Wind Shear
 VWU Viewing Unit Western longitude
 Vx Version x
 W West
 W White
 w Wake Vortex category
 W Watt
 W/E Warning/Error Condition
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 Acronym Full form
 W/S WorkStation
 W/U Wilco/Unable (CPDLC Response Type)
 W/V Wind Velocity and Direction
 W3C World Wide Web Consortium
 WA Wide-Area
 WA Weather Area
 WA EATM Working Arrangements
 WAA Wide Area Augmentation
 WAAS Wide Area Augmentation System (US)
 WAC World Aeronautical Chart (ICAO, 1:1 000 000)
 WAC West Assistant Controller
 WAC World ATM Congress
 WACC Weighted Average Cost of Capital
 WACS Wireless Airport Communication Systems
 WAD Wide Area Differential
 WAD-GNSS Wide Area Differential GNSS
 WADGNSS Wide Area Differential Global Navigation Satellite System
 WADGPS Wide Area Differential GPS
 WAFC World Area Forecast Centre
 WAFS World Area Forecast System
 WAFTAGE Winds Analysed and Forecast for Technical Aircraft Guidance over Europe
 WAGE Wide Area GPS Enhancement program
 WAI Women in Aviation International
 WAIT parking' facility for up to 3 incoming calls (VCS)
 WAIT Wait time
 WAKESEP Wake Vortex Separation Reductions
 WAM Wide Area Multilateration (Multilatération sur zone étendue)
 WAMLAT Wide Area Multi-Lateration
 WAN Wide Area Network (Réseau longue distance)
 WAP Wireless Access Protocol
 WAR Warning
 WARC World Administrative Radio Conference
 WARC-MOB World Administrative Radio Communication Conference - Mobile Communication.
 WB World Bank
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 Acronym Full form
 WB WestBound
 WBAR Wing BAR lights
 WBC-SD World Business Council for Sustainable Development
 WBE Work Breakdown Element
 WBS Wheel Braking System
 WBS Work Breakdown Structure
 WBS Web Seal
 WBT Web-Based Training
 WC Working Cell
 WC World Coordinates
 WC Waypoint Capture
 WCC West Coordinating Controller
 WCG Washington Consultant Group
 WCL Weather Channel
 WCO Wilco (N-FDPS)
 WCS Web Coverage Service
 WDF World Duty Free
 WDG WatchDoG
 WDI Wind Direction Indicator
 WDM Wavelength Division Multiplexing
 WDPS Weather Data Processing
 WDS Weather Dependent Separation(s)
 WDSPR WiDeSPRead
 WDW (Screen) WinDoW
 WDW Window
 WE-FREE Week End Free Route for Environmental Efficiency
 WEA Whole ECAC Area
 WEC West Executive Controller
 WED WEDnesday
 WEF With Effect From
 WEO West Executive Overflow
 WEP Wired Equivalent Privacy
 WEST Weather, Equipment, Situation, Traffic
 WEU Western European Union (military matters) / Union de l'Europe Occidentale (=UEO)
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 Acronym Full form
 WFO Weather Forecast Office
 WFQ Weighted Fair Queuing
 WFS Web Feature Service
 WG Working Group
 WG-41 Working Group 41
 WG-49 Working Group 49
 WG-51 Working Group 51
 WG-70 Working Group 70
 WG-A Working Group A
 WG-B Working Group B
 WG1 Working Group 1
 WG2 Working Group 2
 WG49 Working Group 49
 WG67 Working Group 67
 WGCS-84 World Geodetic System/Standard (1984)
 WGPDS Word and Graphics Process Documentation System
 WGR Working Group on Route Charges
 WGRSG Sub-Group of the Charges Working Group
 WGS World Geodetic System / Système géodésique mondial
 WGS World Geodetic Survey
 WGS 84 World Geodetic System -Map projection system defined by the International Union of Geodesy and
 Geophysics (IUGG).
 WGS-72 World Geodetic System/Standard (1972)
 WGS-84 World Geodetic System 84, which is the ICAO recommended parameterisation of an ellipsoid earth model
 WGS84 World Geodetic System 1984
 WGTS Working Group of Training Specialists
 WHC West High Coordinator controller
 WHE West High Executive controller
 WHORU WHO aRe yoU? (CWP status/configuration)
 WHOT What's Happening Out There?
 WI WithIn
 WIAS Wetterdaten und Informations-Anzeigesystem (DFS) (DE)
 WIC Weekly Information Corner (EEC Brétigny)
 WID WIDth
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 Acronym Full form
 WIDAO Wake Independent Departure & Arrival Operations
 WIE With Immediate Effect
 WILCO Will Comply
 WIMAX Worldwide Interoperability for Microwave Access
 WiMAX Worldwide Interoperability for Microwave Access
 WIMP Windows, Icons, Mouse and Pointers (ODS)
 WINTEM forecast upper WINds & TEMperatures for Aviation
 WIO West Input Operator
 WIP Work in Progress
 WIPO World Intellectual Property Organization
 WIPP WAAS Integrity Performance Panel
 WIR What-If Re-routing
 WIRS Wide Area Reference Stations
 WISDOM World Interconnected Sources Database of Operational Movements
 WKN Weakening
 WKSP Transmission Centres Workshop (Atelier des centres émetteurs de données)
 WL Work Load
 WLA WorkLoad Assessment
 WLAN Wireless Local Area Network
 WM Working Practice Management
 WM Working Memory
 WMB Window Management Button, (Mouse / Trackball)
 WMO World Meteorological Organisation
 WMS Web Map Service
 WMSC Weather Message Switching Center (US)
 WNT WAAS Network Time
 WNW West-North-West
 WO WithOut
 WOC Wing Operations Centre
 WOCL Window of Circadian Low
 WOD Word Of the Day
 WORM Write Once, Read Many (digital storage medium)
 WP Working Position
 WP Way Point
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 Acronym Full form
 WP Work Programme
 WP Working Paper
 WP Work Package
 WPCG Work Programme Coordination Group
 WPD Work Programme Document
 WPG Wise Persons Group
 WPG Agency Web publication user group
 WPL Work Package Leaders (EATCHIP)
 WPM Words Per Minute
 WPn First waypoint in the next sector
 WPP Working Position Processor
 WPR Waypoint Position Report
 WPS Working Practices
 WPs Working Positions
 WPT Way-point (or Waypoint)
 WPx Next waypoint on the flight plan
 WR Weather Radar
 WRC World Radiocommunication Conference (Conférence mondiale des radiocommunications)
 WRC Work station Resource Centre
 WRED Weighted Random Early Detection
 WRI Written Assessment
 WRNG WaRniNG
 WRS Wide Area Reference Stations (WAAS)
 WRT With Respect To
 WS Work Station
 WS Wind Shear
 WS Watch Supervisor
 WSC West Sector Coordinator
 WSCMO Weather Service Contract Meteorological Office (US)
 WSDL Web Service Definition Language
 WSO Weapons Systems Operator
 WSO Weather Service Office (US)
 WSW West-South-West
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 Acronym Full form
 WSWS Wirbelschleppenwarnsystem (Wake Turbulence Warning System) (dispositif avertisseur de turbulences de
 sillage)
 WT Wake Turbulence
 WTC Wake Turbulence Category
 WTP Willingness to Pay
 WTTF Wind Turbine Task Force
 WTWS Windshear and Turbulence Warning System
 WUT Wheels-Up Time
 WV Wake Vortex
 WVTF Wake Vortex Task Force
 WW2 World War II
 WWLUA Wijziging Werkwijze Luchtverkeerbeveiliging in de Upper Airspace
 WWTUG Worldwide TAAM User Group
 WWW World Wide Web (INTERNET)
 WX Weather
 WXCM Weather Exchange Conceptual Model
 WXMS Weather Mapping System
 WXR Airborne Weather Radar
 WXXM Weather Information Exchange Model
 WXXS Weather Information Exchange Schema
 WYSIWYG What You See Is What You Get
 WYSIWYP What You See Is What You Print
 X cross
 X-axi Horizontal Plane
 X-band X-band (radar frequency band)
 X-Gate Exit Gate
 X-pulse Pulse Position 8 in a Classical SSR reply
 X.121 CCITT Data Network Addressing Standard
 X.25 X.25 (ISO Networking Standard)
 X.25 Message handling protocol
 X.25 Packet Switched Data Network
 X.25 CCITT / ITU-T Packet Switched Data Interchange Standard
 X.400 The OSI message handling protocol
 X.435 ITU-T Recommendations on EDI Messaging
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 Acronym Full form
 X.440 ITU-T Recommendations X.440 on Voice Messaging Systems
 X.500 Directory Standards
 X25 Standard protocol in telecommunications
 XA eXit Arrival
 XAP Crossing Alternate Proposal Message
 XASM Cancel Assume (N-FDPS)
 XASP Extended AIRCOM Service Processor
 XBAR crossBAR (of approach lighting system)
 XBD BounDary crossing flight level
 XBRIGHT cancel increased Intensity of a selected track in own sector
 XBRIGHT Cancel highlighting
 XBYPASS Cancel BYPASS (N-FDPS)
 XCC cancel Code Callsign
 XCD Exceptional Conditions
 XCM Crossing Request Cancelation Message (OLDI)
 XCONF Delete CONFlict
 XCONF cancel CONFlict warning symbols in the ecms concerned
 XCOORD Cancel Coordination
 XCOP Exit Coordination Point
 XCOR Cancel Correlation
 XCORR Cancel Correlation (N-FDPS)
 XDCE Either an ADCE or a GDCE
 XDLP Either an ADLP or a GDLP
 XDR eXternal Data Representation
 XECM erase ECM display
 XECM Cancel Executive Controller Message
 XERM cancel ERM
 XEU European Currency Unit (ECU)
 XEXPLT Cancel Extrapolation
 XF XF Addressing Scheme
 XFDM Cancel FDM
 XFER Transfer
 XFF extended Free-Flight
 XFL Exit Flight Level (from a sector or volume of airspace)
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 Acronym Full form
 XFRQ Cancel Frequency message
 XGA eXtended Graphics Array
 XGEO Cancel GEO
 XHOLD Cancel Hold
 XID Exchange Identification
 XIFL Cancel Intermediate Flight Level
 XIN Military Crossing Intention Notifi-cation Message
 XIN Crossing intentions
 XL eXit Lateral
 XLS Instrument Approach using either ILS, MLS, SBAS or GBAS
 XLS Excel Programme
 XMAN Cross-Border Arrival Management
 XMET Cancel METAR
 XMIB Cross-Domain Management Information Base
 XML Extensible markup Language
 XMS eXtended Memory Specification
 XMT transMiT(ssion)
 XMT Excluding (Message)
 XNG crossiNG
 xNOTAM Digital NOTAM
 XNSSR Exit NSSR
 XOFF/PDR Cancel Off Predetermined Route
 XOL X (-Windows) Open Look
 XOR Exclusive OR
 XPDR Transponder (abbreviated term)
 XPFL Cancel Planned Flight Level (N-FDPS)
 XPG Excellence Policy Group of ANSP Managers
 XPLN Cancel Flight Plan (N-FDPS)
 XPNDR Transponder (abbreviated term)
 XPT eXit PoinT
 XPT Exit Point of a sector (ODID)
 XQDM Cancel QDM
 XRA Crossing Request Answer (SEROS / MADAP)
 XRA CROSsing Request Answer
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 Acronym Full form
 XRANGE cancel RANGE marker
 XRNG cancel RaNGe marker
 XRQ Airspace Crossing Request Message (Airspace Crossing Dialogue)
 XS atmospherics
 XSD XML Schema Definition
 XSFL Cancel Supplementary Flight Level
 XSKIP Cancel SKIP (N-FDPS)
 XSSDU eXpedited SSDU data
 XSSR Exit SSR
 XSSRBRIGH cancel SSRBRIGHt input(s) in own sector
 XSSRBRIGH Cancel SSR highlight
 XSTAT (eXclude from) STATistics
 XSTAT Cancel Statistics
 xStream Cross-border SESAR trials for enhanced arrival management
 XT eXtended Technology (PC)
 XTDCP Cancel Test Display Control Panel
 XTDCP cancel DCP Test
 XTEDD Cancel Test Electronic Data Display
 XTFL Cancel Transfer Flight Level (N-FDPS)
 XTI X Open Transport Layer Interface
 XTK Cross Track Distance
 XTRK Cancel Track
 XTRK Cross Track Error
 XTT Across Track Tolerance
 Y Yes (8.33 kHz channel spacing equipment carried on board)
 Y-axi Horizontal Plane
 Y2000 Year 2000
 Y2K Year 2000
 Y2K Year 2000 bug
 YAG Yttrium Aluminium Garnet
 YAN Young Aviation Network
 YCZ Yellow Caution Zone (runway lighting)
 YD YarD(s) (length of 3 feet)
 YIG Yttrium Iron Garnet
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 Acronym Full form
 YR YouR
 YTD Year To Date
 YU The Federal Republic of Yugoslavia (ISO Countries Codes)
 Z Zulu Time
 Z-axi Vertical Plane
 Z-component Vertical Plane
 Z-count 29-bit binary number consisting of the fundemental GPS time
 ZBTSI Zero Byte Time Slot Interchange
 ZDR Differential Reflectivity
 ZH Horizontal Reflectivity
 ZI Maximum Reflectivity
 ZIF Zero Insertion Force
 ZIP Zigzag In-line Package
 ZKSD Zentraler KontrolStreifenDruck (discontinued as of beginning 2007)
 ZNY New York Air Route Traffic Control Center
 ZOC Zone Of Convergence
 ZSA Zergo Security Architecture
 ZT Zone Time
 ZV Vertical Reflectivity
 ZVE Zentrale Überwachung (DE)
 ZVF Zero Velocity Filter
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