GNSS & AERONAUTICS GLOSSARY – LEXICON

Here you can consult our lexicon / glossary of technical terms in GNSS, aviation and space.

  • A/A: Air to air
  • A/G: Air/Ground
  • AAA: Aesean Airline Association
  • AAC: Airline Administrative Communication
  • AAIB: Air Accidents Investigation Branch (UK)
  • AALPBH: Association of Airline Pilots in Bosnia & Herzegovina
  • AAM: Airbus Asset Management
  • AAME: Association of Aviation Medical Examiners
  • AAP: IFALPA Accident Analysis & Prevention Committee
  • AAPA: Association of Asia Pacific Airlines
  • AASA: Air Lines Association of Southern Africa
  • AASC: Airport Authorities Steering Committee
  • AAT: Aeronautics and Air Transport
  • AATF: Airworthiness Assurance Task Force
  • ABET: Airspace Behavioral Engineering Technology
  • ABM: Abeam
  • ABV: Above
  • AC: Altocumulus
  • ACA: Austrian Cockpit Association
  • ACAC: Arab Civil Aviation Council
  • AC: Advisory Circular
  • ACAMS: Aircraft Condition Analysis and Management System
  • ACARE: Advisory Council for Aviation Research and Innovation in Europe
  • ACARS: Aircraft Communications, Addressing, and Reporting System
  • ACARS: MU Aircraft Communications, Adressing and Reporting Systems Management Unit
  • ACAS: Airborne Collision Avoidance System
  • ACCC: Australian Competition and Consumer Commission
  • ACCS: Air Command and Control System
  • ACDAC: Asociacion Colombiana de Aviadores Civiles (Columbia)
  • ACG: ATN/CNS Consultancy Group
  • ACH: Air traffic control Flight Plan Change
  • ACI : Airports Council International
  • ACIPLA: Asociacian Civil de Pilotos de Lineas Aereas (Uruquay)
  • ACK: Acknowledge
  • ACL: Air Traffic Control Clearance (Service)
  • ACM: Acceptable Means of Compliance
  • ACNZ: Airways Corporation of New Zealand
  • ACRPWG: Aircraft Crash Recovery Procedures Working Group
  • AD: Aerodrome
  • ADEP: Aerodrome of Departure
  • ADES: Aerodrome of Destination
  • ADF: Automatic Direction Finder
  • ADIRS: Air Data Inertial Reference System
  • ADIS: Automatic dependent surveillance and Data Link Interim System
  • ADISP: Automated Data Interchange Systems Panel
  • ADIZ: Air Defence Identification Zone
  • ADM: Aeronautical Decision Making
  • ADO: IFALPA Aircraft Design & Operation Committee
  • ADREP: Aircraft Accident/Incident Data Reporting System (ICAO)
  • ADS: Automatic Dependent Surveillance
  • ADS-B: Automatic Data Surveillance Broadcast
  • ADS-B Out: Automatic Dependent Surveillance-Broadcast Out
  • ADS-C: Automatic Data Surveillance Contract
  • ADSP: Automatic Dependent Surveillance Panel (ICAO)
  • AEA: Association of European Airlines
  • AEEC: Airlines Electronic Engineering Committee
  • AEROSAT: Aeronautical Satellite Council
  • AFA: Association of Flight Attendants
  • AFC: Air Traffic Control Frequency Change (Service)
  • AFCAC: African Civil Aviation Commission
  • AFCS: Automatic Flight Control System
  • AFIS: Aerodrome Flight Information Service
  • AFM: Aeroplane Flight Manual
  • AFN: Air traffic Services Facilities Notification
  • AFP: Area Forecast Panel
  • AFRAA: African Airlines Association
  • AFS: Aeronautical Fixed Service
  • AFTN: Aeronautical Fixed Telecommunications Network
  • AGA: Aerodromes, Air Routes and Ground Aids
  • AGAS: European Action Group for ATM Safety
  • AGE: IFALPA Aerodrome & Ground Environment Committee
  • AGL: Above Ground Level / ASFC : Above surface
  • AHRS: Attitude Heading Reference System
  • AI: Application Interface
  • AIC: Aeronautical Information Circular
  • AIDC: ATS Interfacility Data Communication
  • AIDS: Airborne Integrated Data Systems
  • AIG: Accident Investigation & Prevention (ICAO Divisional)
  • AIM: Aeronautical Information Management
  • AIM-FANS: Airbus Interoperable Modular FANS
  • AIMS: Aircraft Information Management System
  • AIP: Aeronautical Information Publication
  • Air: Report (message designator)
  • AIRAC: Aeronautical Information Regulation & Control
  • AIRC: Aeronautical Information & Control
  • AIRCOM: Air Communications
  • AIREP: Plain language form of Air Report
  • Airspace and Traffic Management
  • AIRSTRM: Assuring the Implementation of Regulations for the Safe Transport of Radio-active Materials
  • AIS: Aeronautical Information Services
  • AIXM: Aeronautical Information eXchange Model
  • AL: Approach Lights
  • ALPA: Asociacion de Pilotos de Lineas Aereas (Argentina)
  • ALPA: Japan Air Line Pilots’ Association of Japan
  • ALPA-A: Air Line Pilots’ Association of Armenia
  • ALPA-E: Air Line Pilots’ Association of Ethiopia
  • ALPA-FYROM: Air Line Pilots’ Association of The Former Yugoslav Republic of Macedonia
  • ALPA-Int: Air Line Pilots’ Association – International
  • ALPA-K: Air Line Pilots’ Association of Korea
  • ALPA-M: Airline Pilots’ Association – Malta
  • ALPAP: Air Line Pilots’ Association of the Philippines
  • ALPA-S: Air Line Pilots’ Association – Singapore
  • ALPA-SA: Air Line Pilots’ Association – South Africa
  • ALPA-SL: Air Line Pilots’ Association of Slovenia
  • ALPL: Association Luxembourgeoise des Pilotes de Ligne
  • ALR: IFALPA’s Airport Liaison Representative Program
  • ALRS: Approach Lighting System
  • ALT: Altitude (above mean sea level)
  • ALTN: Alternate aerodrome
  • AMA: Area Minimum Altitude
  • AMC: Air Traffic Control Microphone Check
  • AMCP: Aeronautical Mobile Communications Panel
  • AMDA: Airlines Medical Directors Association
  • AMOSA: Association of Aviation Maintenance Organisations of Southern Africa
  • AMPL: Association Marocaine de Pilots de Ligne
  • AMSL: Above Mean Sea Level
  • AMSS: Aeronautical Mobile Satellite System
  • AMSSP: Aeronautical Mobile Satellite Service Panel
  • ANC: Air Navigation Commission
  • ANConf: Air Navigation Conference
  • ANPAC: Associazione Nazionale Piloti Aviazione Commerciale (Italy)
  • ANPP: Air Navigation Plan Publication
  • ANSP: Air Navigation Service Provider
  • ANT: Air Navigation Team (Eurocontrol)
  • AO: Aircraft Operator
  • AOA: Aircrew Officers Association
  • AOAS: Advanced Oceanic Automation System
  • AOC: Airline Operational Control
  • AOCI: Airport Operators Council International
  • AOPG: Aerodrome Operations Planning Group
  • APA: Allied Pilots Association
  • APA(CV): Air Line Pilots Association (Cape Verde)
  • APANPIRG: Asia/Pacific Air Navigation Planning and Implementation Regional Group APATSI Airport/air traffic system interface
  • APDSG: Airspace Planning & Development Sub-Group
  • APEC: Aircraft Performance Evaluation & Certification
  • APG: Asosiasi Pilot Garuda
  • APGSL: Air Line Pilots’ Guild of Sri Lanka
  • API: Advanced Passenger Information
  • API: Application Programming Interface
  • APIRG: African Planning and Implementation Regional Planning Group
  • APLRIM: Association des Pilotes de Lignes de Mauritanie
  • APM: Accident Prevention Manual
  • APN: Apron
  • A-PNT: Alternative Positionning Navigation and Timing
  • APP: Approach Control
  • APPA: Asociacion Profesional de Pilotos Aviadores de Costa Rica
  • APPLA: Associacao Pilotos Portugueses Linha Aerea (Portugal)
  • APU: Auxiliary Power Unit
  • APV: Approach Procedures with Vertical guidance
  • AQM: Aircom Quality Performance
  • AR: Administrative Recommendation
  • ARAC: Aviation Rulemaking Advisory Committee (FAA)
  • ARASCNAC: Air traffic services Routes for Aircraft with Self-contained Navigational
  • Capabilities
  • ARC: Area Chart
  • ARC:Aviation Rulemaking Committee
  • ARCP: Aerodrome Reference Code Panel
  • ARINC: Aeronautical Radio INCorporated
  • ARITRM: Assessment of the Radiological Impact from the Transport of Radioactive Materials
  • ARM: Airspace Risk Model
  • ARO: Air traffic services reporting office
  • ARP: Aerodrome Reference Point
  • ARQ: Automatic error correction
  • ARST: Arresting (part of an aircraft arresting system)
  • AS: Altostratus
  • ASA: Airservices Australia
  • ASAP: Aviation Safety Action Programme
  • ASC: Aviation Safety Council Ascend to or ascending
  • ASCOS: Aviation Safety and Certification of new Operations and Systems
  • ASD: Air Situation Display
  • ASDA: Accelerate Stop Distance Available
  • ASE: Altimetry System Error
  • ASECNA: Agence pour la Securité de la Navigation en Afrique et à Madagascar (Agency for Security and Navigation for Africa and Madagascar)
  • ASIP: AVPAC (Aviation VHF-Very High Frequency- Packet Communication) Simple Interface Protocol
  • ASM: Air Space Management
  • AsMA: Aerospace Medical Association
  • ASP: AIRCOM Service Processor
  • ASPA: Asociacian Sindical de Pilots Aviadores de Mexico
  • ASPENN RPG: Aeronautical Fixed Service Planning Study EUR/NAM/NAT Regional Planning Group
  • ASPH: Asphalt
  • ASPLAB: Asociacion Sindical de Pilotos del Lloyd Aereo (Bolivia)
  • ASPP: Aeronautical Fixed Service Systems Planning for Data Interchange Panel
  • ASTERIX: All Purpose Structured EUROCONTROL Radar Information Exchange
  • ASTOR: Aircraft Simulation for Traffic Operations Research
  • ATA: Air Transport Association of America
  • ATAFG: African Air Traffic Analysis and Forecasting Group
  • ATAG: Air Transport Action Group
  • ATC: Air Traffic Control
  • ATCA: Air Traffic Controllers Association (USA)
  • ATFM: Air Traffic Flow Management
  • ATIS: Aerodrome Terminal Information Service
  • ATIS-B: Automatic Terminal Information Service – Broadcast
  • ATK: Air Traffic Controller Acknowledgement (service)
  • ATLA: Air Transport Licensing Authority
  • ATM: Air Transport Management
  • ATMCP: Air Traffic Management Operational Concept Panel
  • ATMG: Airspace and Traffic Management Group
  • ATMRPP: ATM Requirements and Performance Panel
  • ATN: Aeronautical Telecommunications Network
  • ATNP: Aeronautical Telecommunications Network Panel
  • ATPL: Air Transport Pilot Licence
  • ATS: Air Traffic Services
  • ATSB: Air Transportation Stabilisation Board Australian Transport Safety Bureau
  • ATSU: Air Traffic Services Unit
  • ATTCS: Automatic Takeoff Thrust Control Systems
  • ATV: Associazione Tecnici di Volo Aviazione Civile (Italy Flight Engineers)
  • ATZ: Aerodrome Traffic Zone
  • AUS-ALPA: Australian Air Line Pilots Association
  • AUSEP: Australian RNAV Separation Standards
  • A-VDGS: Advanced-Visual Docking Guidance System
  • AVLC: Aviation VHR Link Control
  • AVMED: Aviation Medicine
  • AVPAC: Aviation VHF (Very High Frequency) Packet Communication
  • AVSEC: Aviation Security
  • AWO JAA: All Weather Operations
  • AWOP: All Weather Operations Panel
  • AWOS: Automated Weather Observation System
  • AWPA: Australian Women Pilots’ Association
  • AWY: Airway
  • BA: Braking Action
  • Bahamas ALPA: Bahamas Airline Pilots’ Association
  • BALPA: British Air Line Pilots’ Association
  • BAPA: Bangladesh Airline Pilots’ Association
  • BCC: Battery Charge Controller
  • BeCA: Belgium Cockpit Association
  • BORG: Basic Operational Requirements Group
  • BSP: Aircraft Parameter Downlink (service)
  • BUL-ALPA: Bulgarian Air Line Pilots’ Association
  • CAA NZ: Civil Aviation Authority of New Zealand
  • CAA PNG: Civil Aviation Authority of Papua New Guinea
  • CAA SI: Civil Aviation Authority of Solomon Islands
  • CAA: Civil Aviation Authority
  • CAAC: Civil Aviation Administration of China
  • CAAF: Civil Aviation Authority of Fiji
  • CAAS: Certification of Aeroplane Automatic Systems
  • CAASA: Commercial Aviation Association of Southern Africa
  • <li>CACRC: Commercial Aircraft Composite Repair Committee
  • CAEE: Committee of Aircraft Engine Emissions
  • CAeM: Commission for Aeronautical Meteorology
  • CAEP: Committee on Aviation Environmental Protection (ICAO)
  • CALPA: China Airline Pilots’ Association
  • CAMA: Civil Aviation Medical Association
  • CAN: Committee on Aircraft Noise
  • CANDI: Civil Aviation Network Data Interchange
  • CANSO: Civil Air Navigation Services Organisation
  • CAP: Study Group on Continuing Airworthiness Problems
  • CAPA: Cayman Airline Pilots’ Association
  • CAPS: Computer Automated Profiling Systems
  • CARATS: Collaborative Actions for Renovation of Air Traffic Systems
  • CAS: Calibrated Air Speed
  • CASA: Civil Aviation Safety Authority (Australia)
  • CASA: Computer Assisted Slot Allocation
  • CASS: Corporate Aviation Safety Seminar
  • C-ATSU: Current Air Traffic Services Unit
  • CAVOK: Ceiling and Visibility OK / Clouds and Visibility OK
  • CAVU: Ceiling and Visibility Unlimited
  • CAWU: Civil Aviations Workers Union
  • CBOC: Composite Binary Offset Carrier
  • CCAA: Chinese Civil Aviation Association
  • CCO: Continuous Climb Operations
  • CCQ: Cross Cockpit Qualification
  • CCS: Cabin Communications System
  • CD: Candela
  • CDA: Continuous Descent Approach
  • CDFA: Constant Descent Final Approach
  • CDN: Coordination (message designator)
  • CDO: Continuous Descent Operations
  • CDR: Conditional Route
  • CDS: Cabin Distribution System
  • CDTI: Cockpit Display of Traffic Information
  • CEAC: Committee of European Airspace Co-ordination
  • CEFA: Committee for Environmentally Friendly Aviation (ERA)
  • CEI: Cabin Equipment Interfaces
  • CET: Central European Time
  • CFDIU: Central Fault Display Interface Unit
  • CFDS: Centralised Fault Display System
  • CFIT: Controlled Flight Into Terrain
  • CFMU: Central Flow Management Unit
  • CG: Centre of Gravity
  • CGL: Circling Guidance Lights
  • CHG: Modification (message designator)
  • CIDIN: Common ICAO Data Interchange Network
  • CIE: International Commission on Illumination
  • CIMO: Committee for Instruments and Methods of Observation
  • CIP: Convergence and Implementation Programme
  • CIR: Cockpit Image Recorders
  • CIRM: International Radio Maritime Committee
  • CLOP: Criminal Liability of Pilots
  • CMIC: Civil/Military Interface Committee
  • CNS: Communication, Navigation and Surveillance
  • COCESNA: Central American Corporation for Air Navigation Services
  • CODA: Central Office of Delay Analysis
  • COSCAP: Cooperative Development of Operational Safety and Airworthiness Activities
  • CPAR: Cockpit Personnel Association of Russia
  • CPC: Circulo de Pilotos de Chile
  • CPDLC: Controller Pilot Data Link Communications
  • CPL: Commercial Pilot Licence
  • CPU: Core Processing Unit
  • CRAM: Conditional Route Availability Message
  • CRCO: Central Route Charges Office
  • CRM: Collision Risk Methodology
  • CRO-ALPA: Croatian Air Line Pilots’ Association
  • CRP: Co-ordinated Research Programme
  • CS: Certification Specification
  • CSI: Criticality Safety Index
  • CSM: Consultant Services Meeting
  • CTAM: Climb to and maintain
  • CTO: Calculated Time Over
  • CTOL: Conventional Take-Off & Landing
  • CTU: Cabin Telecommunications Unit
  • CUI: Committee on Unlawful Interference
  • CVR: Cockpit Voice Recorder
  • CW: Carrier Wave
  • CWP: Controller Working Position
  • CZ-ALPA: Czech Air Line Pilots’ Association
  • DALPA: Danish Air Line Pilots’ Association
  • DANT: Danish NEAN Project Team
  • DAP: Download of Aircraft Parameter
  • DARP(S): Dynamic Airborne Route Planning (System)
  • DATAC: Digital Autonomous Terminal Access Communication
  • D-ATSU: A Downstream Air Traffic Services Unit
  • DCAA: Danish Civil Aviation Administration (SLV)
  • DCD: Double Channel Duplex
  • DCPC: Direct Controller-Pilot Communications
  • DCS: Double Channel Simplex
  • DED: Directorate of European Air Traffic Control Harmonisation and Integration Programme Development
  • DEFAMM: Demonstration Facilities for Airport Movement Management
  • DES: Descend to/descending
  • DEV: Direction des Essais en Vol
  • DFTI: Distance From Touchdown Indicator
  • DG: IFALPA Dangerous Goods Committee
  • DGAC: Direction Générale de l’Aviation Civile (France)
  • DGB: Dangerous Goods Board
  • DGCA: Director-Generals of Civil Aviation
  • DGELG: Dangerous Goods European Advisory Group
  • DGP: DLEC Dangerous Goods Panel – Department for Liaison with the European Community
  • D-GPS: Differential Global Positioning System
  • DGPS: Differential GPS
  • DGRs: Dangerous Goods Regulations
  • DGVII: Directorate General VII
  • DH: Decision Height
  • DITS: Digital Information Transfer System
  • DL: Downlink Message
  • DLAP: Down Linked Aircraft Parameters
  • DLASD: Data Link Application and System Document
  • DLH: Deutsche Lufthansa
  • DLR: German Aerospace Center
  • DLSG: Data Link Sub Group (Eurocontrol)
  • DME: Distance Measuring Equipment
  • DMI: Distance Measurement Instrument
  • DOA: Design Organisation Approval
  • DOP: Dilution Of Precision
  • DOTS: Dynamic Ocean Tracking System
  • DP: Dew Point Temperature
  • DR: Dead Reckoning Navigation
  • DSAC: Directions de la Sécurité de l’Aviation Civile
  • DSB: Double Side Band
  • DSCN: Direct Speech Circuit Networks
  • DSNA: Direction des Services de la Navigation Aérienne
  • DTG: Distance To Go
  • DTU: Data Terminating Unitv
  • DTW: Dual Tandem Wheels
  • DUT: Device Under Test
  • DW: Dual wheels
  • DZ: Drizzle
  • EAD: Emergency Airworthiness Directive
  • EAMG: European Air (Traffic Flow Management) Group
  • EANPG: European Air Navigation Planning Group
  • EAPTU: Air Line Pilots Trade Union (Estonia)
  • EARC: Elimination of Ambiguity in Radiotelephony Call Signs
  • EASA: European Aviation Safety Agency
  • EASP: European Aviation Safety Plan
  • EASS: European Aviation Safety Seminar
  • EATCHIP: European Air Traffic Control Harmonisation and Integration Programme
  • EATMS: European Air Traffic Management System
  • EBAA: European Business Aviation Association
  • EBU: Engine Build Unit
  • EC: Executive Controller (also known as ‘Radar Controller’)
  • EC: European Commission
  • ECA: European Cockpit Association
  • ECAC: European Civil Aviation Conference
  • ECAM: Electronic Centralised Aircraft Monitoring (airborne display)
  • ECAR: European Civil Aviation Requirement
  • ECASS: European Committee on Aircrew Scheduling and Safety
  • ECAST: European Commercial Aviation Safety Team
  • ECCAIRS: European Coordination Centre for Accident and Incident Reporting Systems
  • ECMT: European Conference of Ministers of Transport
  • EDD: Electronic Data Display
  • EEC: EUROCONTROL Experimental Centre
  • EFB: Electronic Flight Bag
  • EFC: Expect Further Clearance
  • EGALPA: Egyptian Air Line Pilots Association
  • EGAST: European General Aviation Safety Team
  • EGNOSS: European Geostationary Navigation System Overlay
  • EGPWS: Enhanced Ground Proximity Warning System
  • EHEST: European Helicopter Safety Team
  • EHF: Extremely High Frequency (30,000 to 300,000 Mhz)
  • EHSAT: European Helicopter Safety Analysis Team
  • EIM: Enosis Iptamenon Michanikon (Greece Flight Engineers)
  • ELBA: Emergency Locator Beacon Aircraft
  • ELS: Electronic Library Systems
  • ELT: Emergency Locator Transmitter
  • EMARSSH: Europe, Middle East, Asia Route Structure of the Himalayas
  • EMAS: Engineered Materials Arresting System
  • EMS: Emergency Medical Service
  • E-OCVM: European Operational Concept Validation Methodology
  • EPCU: Electrical Power Control Unit
  • ERA: European Regions Airlines Association
  • EROC: Study Group on En-Route Obstacle Clearance Criteria
  • ERP: Emergency Response Plan
  • ESA: European Space Agency
  • ESASI: European Society of Air Safety Investigators
  • ESSI: European Strategic Safety Initiative
  • ETA: Estimated Time of Arrival
  • ETD: Estimated Time of Departure
  • ETFMS: Enhanced Tactical Flow Management Systems (Eurocontrol)
  • ETO: Estimated Time Over
  • ETOPs: Extended Range Twin-Engine Operations
  • ETOT: Estimated Take Off-Time
  • ETSI: European Telecommunications Standards Institute
  • ETSO: European Technical Standard Orders
  • EU: European Union
  • EU-FCL: EASA Flight Crew Licensing
  • EU-OPS: EASA Operations Regulations
  • EUR /TFG: European Traffic Forecasting Group
  • EUR: Region European Region
  • EURO RAN: European Regional Air Navigation (Meeting)
  • EUROCAE: European Organisation for Civil Aviation Equipment
  • EUROCONTROL: European Organisation for the Safety of Air Navigation
  • EUROPILOTE: European Organisation or Airline Pilots Association
  • EVS: Enhanced Visual System
  • FAA: Federal Aviation Administration (USA)
  • FABEC: Functional Airspace Block Europe Central
  • FADEC: Full Authority Digital Engine Control
  • FAF: Final Approach Fix
  • FAL: Final Assembly Line
  • FALPA: Fiji Air Line Pilots Association
  • FANS: Future Air Navigation System
  • FAP: Final Approach Point
  • FAR: Federation Aviation Regulations (US FAA)
  • FARAWAY: Fusion of Radar and ADS data through two WAY data link
  • FAST: Future Aviation Safety Team
  • FCL: Flight Crew Licensing
  • FCM: Flight Confirmation Message
  • FCT: Friction Coefficient
  • FDA: Flight Data Analysis
  • FDF: Final Dissemination Forum
  • FDFM: Flight Data and Flow Management Group
  • FDM: Flight Data Message
  • FDMS: Flight Data Monitoring System
  • FDP: Flight Data Processing
  • FDPS: Flight Data Processing System
  • FDR: Flight Data Record
  • FEATS: Future European Air (Traffic Services) System Concept Group
  • FENA: Flight Engineers and Navigators Association
  • FHA: Functional Hazard Analysis
  • FIA: Icelandic Air Line Pilots Association
  • FIC: Finance Committee
  • FIM: Fault Isolation Manual
  • FIR: Flight Information Region
  • FISA: Flight Information Service (Automatic)
  • FIS-B: Flight Information Services Broadcast
  • FIXM: Flight Information eXchange Model
  • FKFE: Forum Komunikasi Flight Engineers (Indonesia)
  • FL: Flight Level
  • FLAS: Flight Level Allocation Scheme
  • FLIREC: Flight Recorders
  • FLOE/FLOEast: Informal Flow Control (Europe East)
  • FLOW/FLOWest: Informal Flow Control (Europe West)
  • FLT: Flight
  • FMC: Flight Management Computer
  • FMDB: Fault Message Database
  • FMG: Frequency Management Group
  • FMI: Frequency Management Issues
  • FMPG: Air Traffic Flow Management Planning Group
  • FMS: Flight Management System
  • FMU: Flow Management Unit
  • FNPT: Flight & Navigation Procedures Trainer
  • FO: Flight Object
  • FOC: Full-Operational Capability
  • FOD: Foreign Object Debris
  • FOG: Fiber Optical Gyroscope
  • FOQA: Flight Operations Quality Assurance
  • FP7: 7th Framework Programme
  • FPA: Finnish Pilots’ Association
  • FPDC: Fédération Professionnelle du Drone Civil
  • FPL: Filed Flight Plan
  • FREER: Free-Route Experimental Encounter Resolution
  • FRP: Fares and Rates Panel
  • FSF IAS: Flight Safety Foundation International Aviation Safety
  • FSF: Flight Safety Foundation
  • FSG: Flight Study Group
  • FTPC: Flight Technical Professional Committee
  • FUA: Flexible Use of Airspace
  • FZDZ: Freezing Drizzle
  • FZFG: Freezing Fog
  • FZL: Freezing Level
  • FZRA: Freezing Rain
  • G/A: Ground to Air
  • GA: Go-around
  • GALPA: Ghanaian Air Line Pilots’ Association
  • GANP: Global Air Navigation Plan
  • GAPAN: Guild of Air Pilots & Navigators
  • GASAG: Global Aviation Security Action Group
  • GAT: General Air Traffic
  • GBAS: Ground Based Augmentation System (ie GLS)
  • GCU: Generator Control Unit
  • GDATA: Guide DATA analyser (Software for positioning performance assessment)
  • Georgian ALPA: Georgian Air Line Pilots’ Association
  • GERT: German NEAN Project Team
  • GES: Ground Earth Station (satellite)
  • GIS: Geographic Information System
  • GIVD: Gravity Induced Vestibular Dysfunction
  • GLOC: Gravity Induced Loss of Consciousness
  • GLONASS: GLObal Navigation Satellite System (operated by the Russian Space Forces)
  • GLS: Global Landing System
  • GNLU: GNSS Navigation and Landing Unit
  • GNSS: Global Navigation Satellite System
  • GP: Glidepath
  • GPS: Global Positioning System (operated by the DoD)
  • GPWS: Ground Proximity Warning System
  • GRACYAS: Caribbean/ South American African Regional Planning Group
  • GSIF: Ground Station Identification Frames
  • GSUITE: Guide software suite (Suite of Software used for positioning analysis)
  • GSURV: Guide SURVey software (Software for managing data collection)
  • GTPAPC: Grupo Tecnico de Pilotos Aviadores Profesionales de Cuba
  • GUI: Graphical User Interface
  • GUIDE: GNSS Usage Innovation Development of Excellence
  • HALPA: Hellenic Air Line Pilots Association (Greece)
  • HAPI: Helicopter Approach Path Indicator
  • HARA: Helicopter Airborne Radar Approaches Study Group
  • HASA: Helicopter Association of Southern Africa
  • HAWOP: Helicopter All-Weather Operations Study Group
  • HBT: Human Behavioural Technology
  • HDF: High Frequency Direction-finding station
  • HEL: IFALPA Helicopter Committee
  • HELIOPS: Helicopter Operations Panel
  • HEMS: Helicopter Emergency Medical Services
  • HF: High Frequency
  • HIL: Horizontal Integrity Limit
  • HIRO: High Intensity Runway Operations
  • HIS: Horizontal Situation Indicator
  • HISTB2: High Integrity System Test Bed v2
  • HKALPA: Hong Kong Air Line Pilots Association
  • HKAOA: Hong Kong Aircrew Officers Association
  • HMD: Head Mounted Display
  • HMI: Human Machine Interface
  • HPE: Horizontal Position Error
  • HPL: horizontal protection Limit
  • HTAWS: Helicopter Terrain Awareness and Warning System
  • HUD: Head-Up Display
  • HUGs: Head-Up Guidance Systems
  • HUL: Horizontal Uncertainty Level
  • HUMS: Health & Usage Monitoring Systems
  • HUNALPA: Hungarian Air Line Pilots’ Association
  • HUPER: IFALPA Human Performance Committee
  • IAAC: International Agricultural Aviation Centre
  • IAARC: International Administrative Aeronautical Radio Conference
  • IAASM: International Academy of Aviation and Space Medicine
  • IABA: International Association of Aircraft Brokers and Agents
  • IAC: International Advisory Committee
  • IACA: International Air Carrier Association
  • IACSC: Improved Airworthiness Communications Steering Committee
  • IAEA: International Atomic Energy Agency
  • IAF: Initial Approach Fix
  • IALPA: Irish Air Line Pilots Association
  • IAM: Informal (South Pacific Air Traffic Services Co-ordinating Group) Application Manual
  • IANC: International Airline Navigators Council
  • IAOPA: International Aircraft Owners and Pilots Associations
  • IAP: Instrument Approach Plate
  • IAPA: International Airline Passengers Association
  • IAS: Indicated Air Speed
  • IASA: International Air Safety Association
  • IASS: International Air Safety Seminar
  • IATA: International Air Transport Association
  • IATA: International Air Transport Association
  • ICAO: International Civil Aviation Organisation
  • ICASM: International Congress of Aviation and Space Medicine
  • ICD: Interface Control Document
  • IF: Intermediate Fix
  • IFA: International Federation of Airworthiness
  • IFALPA: International Federation of Air Line Pilots’ Associations
  • IFATCA: International Federation of Air Traffic Controllers’ Associations
  • IFATSEA: International Federation of Air Traffic Safety Electronic Associations
  • IFE: In-flight Emergency
  • IFEA: Indian Flight Engineers Association
  • IFEO: International Flight Engineers Organisation
  • IFFAS: International Fund for Aviation Safety
  • IFHO: International Federation of Helicopter Operators
  • IFP: Integrated Flight Plan System
  • IFPP: Instrument Flight Procedures Panel (ICAO)
  • IFPS: Integrated Initial Flight Plan Processing System
  • IFPZ: Integrated Initial Flight Plan Processing System Zone
  • IFR: Instrument Flight Rules
  • IHST: International Helicopter Safety Team
  • ILO: International Labour Organisation
  • ILS: Instrument Landing System
  • IMA: Integrated Modular Avionics
  • IMC: Instrument Meteorological Conditions
  • IMU: Inertial Management Unit
  • IND: IFALPA Industrial Committee
  • INS: Inertial Navigation System
  • INSTRAT: Institutional Strategy for Air Traffic Management
  • INTERPOL: International Criminal Police Organisation
  • INU: Inertial Navigation Unit
  • IOCS: Interim Oceanic Control System (Interim datalink system for the Auckland Flight Information Region)
  • IOSA: IATA Operational Safety Audit
  • IP: Internet Protocol
  • IPACG: Informal Pacific ATS (Air Traffic Services) Co-ordinating Group
  • IPG: Indian Pilots’ Guild
  • IPV: Instrument Approach with Vertical guidance
  • IR: Ice on Runway
  • IRS: Inertial Reference System
  • ISAD: ICAO’s Incorporating Security into Aircraft Design () Working Group
  • ISASI: International Society of Air Safety Investigators
  • ISO: International Standards Organisation
  • ISPACG: Informal South Pacific ATS (Air Traffic Services) Co-ordinating Group
  • Israel FE: Israel Flight Engineers
  • ISR-ALPA: Israel Air Line Pilots Association
  • ITA: Institute of Air Transport
  • ITF: International Transport Workers Federation
  • ITP: In Trail Procedure (for climb or descent)
  • ITU: International Telecommunications Union
  • IUAI: International Union of Aviation Insurers
  • JAA: Joint Aviation Authorities
  • JALPA: Jamaica Air Line Pilots Association
  • JCCA: Joint Committee for Civil Aviation
  • JSSI: Joint Safety Strategy Initiative
  • JTSO: Joint Technical Standard Order
  • KAEPA: Kuwait Aircraft Engineers and Pilots Association
  • KAL: Korean Airlines
  • KALPA: Kenya Air Line Pilots Association
  • KCCU: Keyboard Cursor Control Unit
  • LAAS: Local Area Augmentation System
  • LACAC: Latin American Civil Aviation Commission
  • LAHSO: Land and Hold Short Operations
  • LAN: Local Area Network
  • LARS: Light-weight Aircraft Recording System
  • LDG: Landing
  • LDM: Low dispersible material
  • LIALPA: Leeward Islands Air Line Pilots Association
  • LIT-ALPA: Lithuanian Airline Pilots’ Association
  • LOA: Letter of Agreement
  • LOC: Localiser
  • LOI: Loss Of Integrity
  • LOSA: Line Orientated Safety Audit
  • LPA: Lebanese Pilots Association
  • LPV: Localiser Performance with Vertical Guidance
  • LRM: Line Replacement Modules
  • LRNS: Long Range Navigation System
  • LROPS: Long Range Operations
  • LRU: Line Replacement Unit
  • LSA: Low specific activity materials
  • MA: Mask Angle
  • MADAP: Maastricht Automatic Data Processing and Display System
  • MALPA: Mauritius Air Line Pilots’ Association
  • MAN: Metropolitan Area Network
  • MAP: Missed Approach Procedure
  • MAPA: Malaysian Airline Pilots’ Association
  • MAPE: Mean Absolute Percentage Errors (traffic forecasting)
  • MAPT: Missed Approach Point
  • MAPt: Missed Approach Point
  • MASPS: Minimum Aviation Systems Performance Standards
  • MAT: Maintenance Access Terminal
  • MATF: Missed Approach Turning Fix
  • MATSE: Meeting on the Air Traffic System in Europe
  • MAUW: Maximum All Up Weight
  • MBA: Microburst Alert
  • MBOC: Multiplexed Binary Offset Carrier
  • MCC: Multi Crew Coordination
  • MCDU: Multifunction Control Display Unit
  • MDA/H: Minimum Descent Altitude/Height
  • MEA: Minimum En-route Altitude
  • MECACON: Middle East Civil Aviation Conference
  • MEL: Minimum Equipment List
  • MET: Meteorological
  • METAG: MET Advisory Group
  • METAR: Meteorological Aerodrome Report
  • METODA: Meteorological Observations and Information Distribution Arrangements for Local Aeronautical Users
  • MFD: Multi Function Display
  • MIL: Military
  • MLS: Microwave Landing Systems
  • MLW: Maximum Landing Weight
  • MM: Middle Marker
  • MMEL: Master Minimum Equipment List
  • MMU: Memory Management Unit
  • MNOP: Maximum Normal Operating Pressure
  • MNPS: Minimum Navigation Performance Specifications
  • MNPSA: Minimum Navigation Performance Specification Airspace
  • MOA: Memorandum of Understanding
  • MOPS: Minimum Operation Performance Standards
  • MOTNE: Meteorological Operational Telecommunication Network in Europe
  • MPL: Multi-crew Pilot Licence
  • MRVA: Minimum Radar Vector Altitude
  • MSL: Mean Sea Level
  • MTBF: Mean Time Between Failure
  • MTOW: Maximum Take-Off Weight
  • MU: Management Unit
  • MUCDU: Multifunctional Control and Display Unit
  • N1: Gas generator speed
  • N2: Second stage turbine speed
  • NAAN: North Atlantic ADS-B Network
  • NAAPE: National Association of Aircraft Pilots and Engineers (Nigeria)
  • NAGU: Galileo Active User Notifications
  • NANUs: Notices to Navstar Users
  • NAPA: Namibia Air Line Pilots’ Association
  • NARG: Navigation Aids and Area Navigation Group
  • NAS: National Airspace System
  • NASA: National Aeronautics and Space Administration
  • NATO: North Atlantic Treaty Organisation
  • NATS: National Air Traffic Services (UK)
  • NATSPG or NAT/SPG: North Atlantic Systems Planning Group
  • NAV: Navigation
  • NAVSEP or NAV/S: Panel Experts on Navigation and Separation
  • ND: Navigation Display
  • NDA: Next Data Authority
  • NDB: Non Directional radio Beacon
  • NDB: Navigation DataBase
  • NEAN: North European ADS-B Network
  • NEAP: North European CNS/ATM Application Project
  • NEG: Negative, No, No permission, that is not correct
  • NextGen: Next Generation Air Transportation System
  • NF: Norwegian Air Line Pilots Association
  • NFPA: National Fire Protection Association
  • NLA: New Large Aircraft
  • NLR: National Aerospace Laboratory of the Netherlands
  • NM: Nautical Miles
  • NMB: National Mediation Board
  • NMEA: National Marine Electronics Association
  • NNAE: Bureau de Normalisation de l’Aéronautique et de l’Espace
  • NOSIG: No Significant change
  • NOTAM: Notice to AirMen
  • NP: Propeller speed
  • NPA: Notice of Proposed Amendments
  • NPA(s): Non-Precision Approaches
  • NPRM: Notice of Proposed Rulemaking (US FAA)
  • NPS: Navigation Performance Scales
  • NSSG: Navigation & Separation Sub-Group
  • NTSB: National Transportation Safety Board
  • NUP: NEAN Update Programme
  • NVG: Night Vision Goggles
  • NVIS: Night-Vision Imaging System
  • NZ-ALPA: New Zealand Air Line Pilots Association
  • OAT: Outside Air Temperature
  • OBS: Omni Bearing Selector
  • OBST: Obstacle
  • OCC: Operations Control Center
  • OCS: Oceanic Control System
  • OCU OMT: (Onboard Maintenance Terminal) Controller Unit
  • ODETE: On-Line Data Exchange Terminal
  • ODIAC-TF: Operational Development of Initial A/g data Communications Task Force
  • ODID: Operational Input and Display System
  • ODL: Oceanic Data Link (Datalink system for the Oakland Flight Information Region)
  • ODT OMT: (Onboard Maintenance Terminal) Display Unit
  • OFZ: Obstacle Free Zone
  • OGP: Oil and Gas Producers Aviation Sub Committee
  • OIP: Organization Iberoamericana de Pilotos
  • OLDI: On-Line Data Interchange
  • OM: Outer Marker
  • OMT: Onboard Maintenance Terminal
  • OP: Operational (issues)
  • OPAC: Operations of Aircraft
  • OPR: Air Traffic Management Operational Requirements
  • OPS: Operations
  • OPS/AIR: Operations/Airworthiness
  • OPSP: Operational Panel
  • OpSpec: Operations Specification
  • ORCAM: Originating Region Code Assignment Method
  • OSI: Open Systems Interconnection
  • OUR: Operational Users Requirements
  • PAAST: Pan American Aviation Safety Team
  • PACOTS: Pacific Organised Track System
  • PAK: Pilot Acknowledgement (service)
  • PALPA: Pakistan Air Line Pilots Association
  • PALPU: Pancyprian Airline Pilots Union
  • PAMC: Provisional Acceptable Means of Compliance
  • PANS: Procedures for Air Navigational Services
  • PANS-OPS: Procedures for Air Navigational Services – Aircraft Operations
  • PAPI: Precision Approach Path Indicator
  • PAR: Precision Approach Radar
  • PASYI: Pan-Cyprian Airline Pilots’ Union (PASYPI)
  • PATRAM: Packaging and Transport of Radio-Active Materials
  • PBS: Preferential Bidding System
  • PCA: Propulsion Controlled Aircraft
  • PCATD: Personal Computer based Aviation Training Device
  • PCM: Post Crash Management
  • PDOP: Position Dilution of Precision
  • PEC: Pan European Conference
  • PED: Passenger Electronic Devices
  • PEL/TRG: Personnel Licensing and Training
  • PETAL: Preliminary EUROCONTROL Test of Air/Ground Data Link
  • PF: Pilot Flying
  • PFA: Pilot Friendly Airport
  • PFCS: Primary Flight Computer System
  • PFD: Planned Flight Data
  • PIC: Pilot In Command
  • PID: Pilot Information Downlink (service)
  • PinS: Point-in-Space Approach
  • PIRG: Planning and Implementation Regional Group
  • PIs: Performance Indicators
  • PLC: Planning Controller (also known as Co-ordinator)
  • PMC: Project Management Cell (Eurocontrol)
  • PMS: Pavement Management System
  • PNF: Pilot Not Flying
  • PNGAPA: Papua New Guinea Air Pilots’ Association
  • POH: Pilot Operating Handbook
  • POL STAT: IFALPA Policy Statement
  • POLALPA: Stowarzyszenie Polskich Pilotow Komunikacyjnych (Poland)
  • PPK: Post Processing Kinematic
  • PRC: Performance Review Commission
  • PRICE: ICAO Proficiency Requirements in Common English Study Group
  • PRL: Pilot Request Level (service)
  • PRN: Pseudo Random Noise
  • PRNAV: Precision Area Navigation
  • PROMET: Provision of Meteorological Information
  • PRQ: Pilot Request (service)
  • PRR: Pilot Request, Route (service)
  • PRU: Performance Review Unit
  • PSC: Project Steering Committee
  • PTOT: Provisional Take-Off Time
  • PTT: Press To Talk
  • PTUK: Pilots’ Trade Union Kazakhstan
  • PTUL: Pilots Trade Union of Latvia
  • PV: Present Value
  • PVT: Position Velocity Time
  • Q PROCEDURE: Procedure to identify replacement flight plans
  • QDM: Magnetic zero wind heading
  • QDR: Magnetic bearing
  • QFA: Qantas
  • QFE: Altimeter setting to give height above aerodrome
  • QNH: Altimeter setting to give height above sea level
  • QOS: Quality of Service
  • RA:Resolution Advisory
  • RAA: Regional Airline Association (USA)
  • RAAS: Runway Aural Awareness System
  • RAC: Rules of the Air and Air Traffic Services
  • RAeS: Royal Aeronautical Society
  • RAIM: Receiver Autonomous Integrity Monitoring
  • RAIM: Receiver Autonomous Integrity Monitoring
  • RAN: Regional Air Navigation
  • RAPNET: Regional ATC Packet switched Network
  • RASP: Radar Application Specialist Panel
  • R-ATSU: The Receiving Air Traffic Services Unit
  • RCL: Runway Centreline Lighting
  • RDPS: Radar Data Processing System
  • REG: Regulatory (issues)
  • REL: Runway Entrance Light(s)
  • RESA: Runway End Safety Area
  • RESMA: Requirements for Emergency and Safety Airborne Equipment
  • RET: Airborne & Ground Retrofit (issues)
  • RF: Radio Frequency
  • RFC: Request For Change
  • RFF: Rescue and Fire Fighting
  • RFL: Requested Flight Level
  • RGCSP: Review of General Concept of Separation Panel
  • RGS: Remote Ground Station
  • RIMS: Runway Incursion Monitoring System
  • RINEX: Receiver Independent Exchange Format
  • RMCDE: Radar Message Conversion and Distribution Equipment
  • RMP: Radio Management Panel
  • RNAV: Area Navigation Receiver Independent Exchange Format
  • RNDSG: Route Network and Development Sub-Group
  • RNMP: Replacement of the Nautical Mile Panel
  • RNP: Required Navigation Performance
  • RO-ALPU: Romanian Air Line Pilot’s Union
  • RPAS: Remotely Piloted Aircraft Systems
  • RPF: Rapid Prototyping Facility
  • RPG: Regional Planning Group
  • RPL: Repetitive Flight Plan
  • RPP: Radiation Protection Programme
  • RPR: Re-Routing Proposal Message
  • RSC: Runway Service Conditions
  • RT/RTF: Radio Telephony
  • RTA: Required Time of Arrival
  • RTCA: Requirements and Technical Concepts for Aeronautics
  • RTCM SC: Radio Technical Commission for Maritime Services Special Committee
  • RTD: Research and Technical Development
  • RTF: Radiotelephony
  • RTK: Real Time Kinematic
  • RTO: Rejected Take Off
  • RVR: Runway Visual Range
  • RVR: Runway Visual Range
  • RVSM: Reduced Vertical Separation Minima
  • RWSL: Runway Status Lights
  • RWY: Runway
  • RX: Receiver
  • SA: Selective Availability
  • SAAFEA: South African Airways Flight Engineers Association
  • SAAM: System for Assignment and Analysis at a Macroscopic level
  • SACAA: Southern African Civil Aviation Authority
  • SAE: Society of Automotive Engineers
  • SAFO: Safety Alert for Operators
  • SAGSTRAM: Standing Advisory Group on the Safe Transport of Radioactive Material
  • SALPA: Sudan Air Line Pilots Association
  • SAPA: Swazi Air Line Pilots Association
  • SAR: Search And Rescue
  • SARPs: Standards and Recommended Practices (ICAO)
  • SAS: Scandinavian Airline Systems
  • SASP: ICAO Separation and Airspace Safety Panel
  • SATCOM: Satellite Communication
  • SATSAR: Satellite-aided Search And Rescue
  • SBAS: Space Based Augmentation System (ie WAAS)
  • SC: Steering Committee
  • SCA: Serbian Cockpit Association
  • SCAA: Swedish Civil Aviation Administration (LFV)
  • SCAT-1: Special Category One
  • SCP: Spacecraft Control Processors
  • SDR: Service Difficulty Report
  • SDS: Sub Domain Server
  • SEAC: Service d’Etat de l’Aviation Civile (French Polynesia)
  • SEC: IFALPA Security Committee
  • SEIFR: Single-Engine Instrument Flight Rules
  • SEOTV: Sindicato Espanol de Oficiales Tecnicos de Vuelo (Spain Flight Engineers)
  • SEP: Safety Equipment and Procedures
  • SEPLA: Sindicato Espanol de Pilotos de Lineas Aereas (Spain)
  • SES: Single European Sky
  • SESAR: Single European Sky ATM Research
  • SESMA: Special Event Trend Analysis
  • SETP: Society of Experimental Test Pilots
  • SF: Special Freighter
  • SGCAS: Study Group on Certification of Automatic Systems
  • SGTOAA: Study Group on Take-off Accountability Areas
  • SICASP: SSR Improvements and Collision Avoidance Systems Panel
  • SID: Standard Instrument Departure
  • SIPAC: Sindicato Panameno de Aviadores Comerciales (Panama)
  • SIPACIP: Sindicato de Pilotos Aviadores Civiles del Paraguay
  • SISG: Safety Indicators Study Group (ICAO)
  • SITA: Société Internationale de Télécommunications Aéronautiques
  • SITNA: Service Technique de la Navigation Aérienne (French technical service)
  • SLOP: Strategic Lateral Offset Procedure
  • SMGCS: Surface Movement Guidance and Control Systems
  • SMI: Special Message Identifier
  • SMR: Surface Movement Radar Study Group
  • SMS: Safety Management System
  • SNA: Sindicato Nacional dos Aeronautas (Brazil)
  • SNOWTAM: Special NOTAM notifying the presence or removal of snow, ice, and slush or associated melt water from the manoeuvring areas of and aerodrome
  • SNPL: Syndicat National des Pilotes de Ligne (France)
  • SOIR: Simultaneous Operations on Parallel or Near-Parallel Instrument Runways
  • SOP: Standard Operating Procedures
  • SPA: Suriname Pilots’ Association
  • SPACDAR: Specialist Panel on Automatic Conflict Detection and Resolution
  • SPAS: Safety Performance Analysis System
  • SPF: Svensk Pilot Forening (Sweden)
  • SPLA: Syndicat des Pilotes de Ligna Algeriens (Algeria)
  • SPNT: Syndicat Personnel Navigant Technique de Tunisia
  • SR&O: System Requirements and Objectives
  • SRA: Surveillance Radar Approach
  • SRC: Safety Regulation Commission
  • SRG: Safety Regulation Group
  • SSA: System Safety Approach
  • SSM: Satellite Signal Monitoring
  • SSR: Secondary Surveillance Radar
  • SSR: Mode S WG Secondary Surveillance Radar Mode Selective WG
  • STA: Scheduled Time of Arrival
  • STAP: (International Civil Aviation Organisation) Statistics Panel
  • STAR(s): Standard Terminal Arrival Routes / STandard ARrival
  • STC: Supplement Type Certificate
  • STCA: Short Term Conflict Alert
  • STDMA: Self-organising Time Division Multiple Access
  • STVAC: Sindicato dos Tecnicos de Voo da Aviacao Civil (Portugal Flight Engineers)
  • SVS: Synthetic Vision Systems
  • SWET: Swedish NEAN Project Team
  • SWIM: System Wide information Management
  • TA: Traffic Advisory
  • TAA: Terminal Approach Altitudes
  • TAAATS: The Australian Advanced Air Traffic Services System
  • TAF: Terminal Aerodrome Forecast
  • TALPA: Turk Hava Yallair Pilotlari Dernegi (Turkey)
  • TARA: Terminal Area R-NAV Applications Sub-Group
  • TARMAC: Taxi and Ramp Management and Control
  • TARTAR: International Civil Aviation Organisation Meetings on Transit Air Traffic Services Routes through the Airspace of the Russian Federation
  • TAWS: Terrain Avoidance Warning System
  • TCAA: Transatlantic Common Aviation Area
  • TCAS: Traffic Alert and Collision Avoidance System
  • TCP: Transmission Control Protocol
  • TDI: Track Deviation Instrument
  • TDM: Track Definition Message
  • TDZ: Touchdown Zone
  • TEMPO: Temporary or temporarily
  • TEN-T: Trans- European Network – Transport
  • TFG: Traffic Forecasting Group
  • TFTS: Terrestrial Flight Telephone System
  • TGS: Taxi Guidance System
  • ThaiPA: Thai Pilots’ Association
  • TIS-B: Traffic Information service – Broadcast
  • TMA: Terminal Area
  • TMBOC: Time-multiplexed Binary Offset Carrier
  • TMC: Traffic Management Coordinator
  • TMU: Traffic Management Unit
  • TOPM: Take-Off Performance Monitors
  • TOR: Terms Of Reference
  • TOS: Traffic Orientation Scheme
  • TPA: Tanzania Pilots Association
  • TRANSSAC: Transport Safety Standards Advisory Committee
  • TRL: Transition Level
  • TRNSG: Testing of Radio Navaids Study Group (ICAO)
  • TROP: Tropopause
  • TSA: Temporary Segregated Area
  • TSD: Time Sequence Diagram
  • TSO: Technical Standards Order
  • TTALPA: Trinidad & Tobago Airline Pilots Association
  • TUI: Trade Unions International of Transport Workers
  • T-VASIS: T Visual Approach Slope Indicator System
  • TWR: Air Traffic Control Tower
  • TWS: Terrain Awareness and Warning System
  • UAC: Upper Area Control Centre
  • UAL: United Airlines
  • UAT: Universal Access Transceiver
  • UAV: Unmanned Aerial Vehicles
  • UHF: Ultra High Frequency
  • UIR: Upper Information Region
  • UK: AIP United Kingdom Aeronautical Information Package (CAP 32)
  • UL: Uplink message
  • ULR: Ultra Long Range
  • UN: United Nations
  • UNCOE: United Nations Committee of Experts
  • UPA: Uganda Pilots’ Association
  • UPU: Universal Postal Union
  • USOAP: Universal Safety Oversight Audit Program (ICAO)
  • UTC: Universal Time Coordinated (equivalent to GMT & Zulu )
  • VAAC: Volcanic Ash Advisory Centre
  • VAC: Visual Approach Chart
  • VAP: Visual Aids Panel (ICAO)
  • VAR: Magnetic Variation
  • VASI: Visual Approach Slope Indicator
  • VASIS: Visual Approach Slope Indicating System
  • VAW: Volcanic Ash Warnings
  • VC: Vereinigung Cockpit (German Air Line Pilots’ Association)
  • VCS: Voice Communications System
  • VDL VHF: (Very High Frequency) Data Link
  • VDP: Visual Descent Point
  • VDR VHF: (Very High Frequency) Digital Radio
  • VFOP: Visual Flight Rules Operations Panel
  • VFR: Visual Flight Rules
  • VFRG: Visual Flight Rules Group
  • VHF: Very High Frequency
  • VIVO: Visualisation des Vols Océaniques (situation display & datalink system for the Tahiti Flight Information Region)
  • VKB KLM: Flight Engineers Association
  • VLDM: Very low dispersible material
  • VMC: Visual Meteorological Conditions
  • VMP: Vertical Measurement Panel
  • VNAV: Vertical Navigation
  • VNV: Vereniging van Nederlandse Verkeersvliegers (Dutch Air Line Pilots’ Association)
  • VOR: VHF Omni-Directional Range
  • VSCF: Variable Speed Constant Frequency
  • VSSG: Vertical Separation Study Group
  • VTOL: Vertical Take-Off & Landing
  • WAAS: Wide Area Augmentation System
  • WAFS: World Area Forecast System Study Group
  • WAN: Wide Area Network
  • WEAA: Western European Airports Association
  • WEAAP: Western European Association for Aviation Psychology
  • WFTU: World Federation of Trade Unions
  • WG: Working Group
  • WGS: 84 World Geodetic System 1984
  • WHO: World Health Organisation
  • WIAS: Weather Information Automated System
  • WIST: Study Group on Low Level Wind Shear Turbulence (ICAO)
  • WMO: World Meteorological Organisation
  • WOCL: Window of Circadian Low
  • WP: Work Package
  • WXXM: Weather eXchange Model
  • XPDR: Transponder
  • XTE: Cross Track Error
  • YOYO: Only Y Available
  • Zulu or z: Equivalent to Greenwich Mean Time or UTC
  • Glossaire

The technical terms reproduced in this glossary – lexicon are explanatory only and does not in any way modify the meanings of such terms.