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| Aviation abbreviations |
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A — Amber A — At, above A — Autotuned navigation aid A/A — Air-to-air A/C — Aircraft A/G — Air-to-ground A/I — Anti-ice A/P — Autopilot A/T — Autothrottle AAA — Amended meterological message AAC — Aeronautical administration communication AAC — Airworthiness Advisory Circular AACC — Area approach control centre AAD — Assigned altitude deviation AAIM — Aircraft autonomous integrity monitor AAIS — Automatic aerodrome information service AAL — Above aerodrome level AAR — Authorised airworthiness representative AAS — Advanced automation system AAT — Administrative appeals tribunal AATT — Advanced aviation transportation technology ABAA — Amateur built aircraft acceptance ABAS — Aircraft based augmentation system ABI — Advance boundary information ABM — Abeam ABN — Aerodrome beacon ABT — About ABV — Above AC — Altocumulus AC — Advisory Circular ACARS — Aircraft communication addressing and reporting system ACAS — Airborne collision avoidance system ACC — Area control centre ACCID — Initial notification of an aircraft accident ACD — Airways clearance delivery ACF — Area control facility ACFS — Advanced concepts flight simulator ACFT — Aircraft ACJ-XXX — Advisory circular joint ACK — Acknowledge ACL — Altimeter check location ACMS — Aircraft condition monitoring system ACN — Aircraft classification number ACPT — Accept, accepted ACROB — Acrobatics ACT — Active, activated, activity AD — Aerodrome AD — Airworthiness directive ADA — Advisory area ADC — Aerodrome chart ADC — Air data computer ADDGM — Aerodrome diagrams ADDN — Addition, additional ADF — Automatic direction finding ADI — Attitude director indicator ADIZ — Air defence identification zone ADJ — Adjacent ADLP — Aircraft data link processor ADO — Aerodrome office ADQ — Adequate aerodrome ADR — Advisory route ADS — Automatic dependent surveillance ADS-B — Automatic dependent surveillance-broadcast ADS-C — Automatic dependent surveillance-contract ADSU — Automatic dependent surveillance unit ADZ — Advise AEP — Aerodrome emergency plan AER — Authorised engineering representative AERA — Automated en-route ATC AERIS — Automatic en-route information service AFCS — Automatic flight control system AFDS — Autopilot flight director system AFIS — Aerodrome flight information service AFM — Yes, affirm, affirmative, that is correct AFM — Aircraft Flight Manual AFRU — Aerodrome frequency response unit AFS — Aeronautical fixed service AFS — Automatic flight system AFT — After AFTN — Aeronautical fixed telecommunication network AG — Agriculture AGA — Again AGATE — Advanced general aviation transport experiments AGL — Above ground level AH — After hours AH — Artificial horizon AHRS — Attitude heading reference system AI — Artificial intelligence AIC — Aeronautical Information Circular AIDC — Air traffic services inter-facitility data communications AIP — Aeronautical Information Publication AIRAC — Aeronautical Information Regulation and Control AIRC — Aeronautical information and control AIREP — Air-report AIRMET — Airmen’s meteorological information AIRS — Advanced infrared sounder AIS — Aeronautical information service AL — Approach lights ALA — Aircraft landing area ALA — Alighting area ALA/HLS — Aircraft landing area/helicopter landing site ALARP — As low as reasonably practical ALERFA — Alert phase ALI — Airworthiness limitation item ALM — Aircraft landing minima ALR — Alerting message ALS — Approach lighting system ALT — Alternate ALT — Altitude ALT HOLD — Altitude hold mode ALTN — Alternate, alternating AM — Amplitude modulation AMA — Area minimum altitude AMC — Acceptable means of compliance AMD — Amend, amended AMDT — Amendment |
AME — Aircraft maintenance engineer AMM — Aircraft Maintenance Manual AMO — Approved maintenance organisation AMP — Aircraft maintenance program AMPA — Authorised maintenance personnel assessor AMS — Aircraft maintenance specialist AMSL — Above mean sea level AMSS — Aeronautical mobile satellite service AMT — Aircraft maintenance technician ANA — Air navigation act ANC — Aeronautical chart, 1:50,000 ANCS — Aeronautical navigation chart, small scale ANO — Air navigation order ANS — Answer ANVIS — Aviator night vision imaging systems AO — Air operator AOA — Airport operations area AOA — Angle of attack AOC — Aerodrome obstacle chart AOC — Aeronautical operation control AOC — Air Operators Certificate AOCM — Air Operators Certification Manual AOCS — Attitude and orbit control system AOD — Alcohol and other drug AOG — Aircraft on ground AOM — Aircraft Operating Manual AP — Airport APAPI — Abbreviated precision approach path indicator APC — Aeronautical passenger communication APCH — Approach APDC — Aircraft parking/docking chart APMS — Automated performance measurement system APN — Apron APP — Approach control APR — April APRT — Airport APRX — Approximate, approximately APSG — After passing APU — Auxillary power unit APV — Approach with vertical guidance APV — Approve, approved, approval AQP — Advanced qualification program AQZ — Area QNH zone ARC — Area chart ARFFS — Aerodrome rescue and fire fighting service ARFL — Aeroplane reference field length ARFO — Area forecast ARH — Aircraft registration holder ARM — Aircraft Recovery Manual ARM — Airspace risk model ARN — Aviation reference number ARNG — Arrange ARO — Air traffic services reporting office ARP — Aerodrome reference point ARP — Air-report ARQ — Automatic error correction ARR — Arrive, arrival ARS — Special air-report ARST — Arresting ARTCC — Air route traffic control center ARTS — Automated radar terminal system AS — Altostratus ASAP — As soon as possible ASC — Ascend, ascending ASDA — Accelerate-stop distance available ASE — Altimetry system error ASE — Airborne support equipment ASEPTA — Approved single-engine turbine aeroplane ASH — Aviation Services Handbook ASI — Airspeed indicator ASI — Aviation safety index ASIR — Aviation safety incident report ASPH — Asphalt ASR — Area surveillance radar ASR — Airport surveillance radar ASRS — Aviation safety reporting system AT — At ATA — Actual time of arrival ATC — Air traffic control ATCSCC — Air traffic control system command center ATD — Actual time of departure ATE — Automatic test equipment ATEL/ANAV — Aeronautical telecommunication and radio navigation services ATFM — Air traffic flow management ATHR — Autothrust system ATIS — Automatic terminal information service ATM — Air transportation management ATM — Air traffic management ATN — Aeronautical telecommunications network ATO — Aviation testing officer ATPL — Airline Transport Pilot Licence ATS — Air traffic service ATS — Automatic throttle system ATSC — Air traffic service communications ATTN — Attention ATZ — Aerodrome traffic zone AUG — August AUTH — Authorised, authorisation AUW — All up weight AUX — Auxiliary AVAIL — Available AVBL — Available AVG — Average AVGAS — Aviation gasoline AVHRR — Advanced very high-resolution radiometer AVM — Abrupt vertical manoeuvres AWACS — Airborne warning and control system AWAS — Automated weather advisory station AWB — Airworthiness bulletin AWIB — Aerodrome weather information broadcast AWIPS — Advanced Weather Interactive Processing System AWK — Aerial work AWS — Automatic weather station AWTA — Advise as to what time is available AWY — Airway AZM — Azimuth |
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