Quick Reference Guide to Australian Aviation Abbreviations
There’s literally hundreds of abbreviations used in aviation, so to make it easier for you, we’ve put together a list of the most common ones you may come across. This list is a very handy resource if you are studying for your Private Pilot License.
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| Acronym | Description | Source |
| A | Amber | ICAO |
| A/A | Air to air | AIS |
| A&P | Airframes and Powerplants | FAA |
| AA | Airservices Australia | |
| AAA | Amended meterological message | ICAO |
| AAAA | Aerial Agriculture Association of Australia | |
| AAC | Airworthiness Advisory Circular | CAR 1988 |
| AACC | Area approach control centre | AIS |
| AAD | Assigned altitude deviation | AIS |
| AAIS | Automatic aerodrome information service | AIS |
| AAL | Above aerodrome level | AIS |
| AAR | Authorised Airworthiness Representative | Part 183 |
| AAT | Administrative Appeals Tribunal | |
| ABAA | Amateur Built Aircraft Acceptance | CAR 1998 |
| ABAS | Aircraft Based Augmentation System | |
| ABF | Australian Ballooning Federation | |
| ABI | Advance boundary information | AIS |
| ABM | Abeam | AIS |
| ABN | Aerodrome beacon | AIS |
| ABT | About | AIS |
| ABV | Above… | AIS |
| AC | Advisory Circular (document supporting CARs 1998) | CAR 1998 |
| AC | Altocumulus (met) | ICAO/AIP |
| ACARS | Aircraft communication addressing and reporting system (pronounced ‘AY-CARS’) | AIS |
| ACAS | Airborne Collision Avoidance System | CAR 1988 |
| ACC | Area control centre | AIS |
| ACCID | Initial notification of an aircraft accident | AIS |
| ACD | Airways clearance delivery | AIS |
| ACFT | Aircraft | AIS |
| ACJ-XXX | Advisory Circular Joint (issued by the JAA, can be preceded by a country code) | JAA |
| ACK | Acknowledge | AIS |
| ACL | Altimeter check location | ICAO |
| ACPT | Accept, accepted | AIS |
| Act | the Civil Aviation Act 1988 | |
| ACT | Active, activated, activity | AIS |
| ACN | Aircraft classification number | ICAO |
| ACN | Australian company number | |
| AD | Aerodrome | ICAO/AIP |
| AD | Airworthiness Directive | Part 39 |
| ADA | Advisory area | ICAO |
| ADAO | Authorised Design Approval Organisation | Part 146 |
| ADC | Aerodrome chart | AIS |
| ADDGM | Aerodrome diagrams | AIS |
| ADDN | Addition, additional | AIS |
| ADF | Automative Direction Finding (equipment) | AIS |
| ADIZ | Air Defence Identification Zone | ICAO/AIS |
| ADJ | Adjacent | AIS |
| ADO | Aerodrome office | ICAO |
| ADQ | Adequate aerodrome | AIS |
| ADR | Advisory route | |
| ADS | The address (when this abbreviation is used to request a repetition, the question (IMI) precedes the procedure signal) abbreviation, eg IMI ADS) (to be used in AFS as a procedure signal) | ICAO/AIP |
| ADS | Automatic Dependent Surveillance | AIP/ICAO |
| ADS-B | Automatic Dependent Surveillance – Broadcast | AIP |
| ADS-C | Automatic Dependent Surveillance – Contract | AIP |
| ADSU | Automatic Dependent Surveillance Unit | ICAO |
| ADZ | Advise | AIS |
| AEP | Aerodrome emergency plan | AIS |
| AER | Authorised Engineering Representative | Part 183 |
| AERIS | Automatic en route information service | AIS |
| AFCS | Automatic flight control system | ICAO |
| AFIL | Flight notification: – filed in the air, or – indicating the position at which ATS services will first be required | AIS |
| AFIS | Aerodrome flight information service | ICAO/AIP |
| AFM | Aircraft Flight Manual | CAR 1988 |
| AFM | Yes, affirm, affirmative, that is correct | AIS |
| AFRU | Aerodrome Frequency Response Unit (also known as a “beepback” unit) | AIS |
| AFS | Aeronautical fixed service | ICAO/AIP |
| AFT | After | AIS |
| AFTN | Aeronautical fixed telecommunication network | ICAO |
| AFZ | Australian fishing zone(s) | AIS |
| A/G | Air-to-ground | AIS |
| AGA | Again | ICAO |
| AGE | Aircraft Ground Equipment | WATOG |
| AGD | Attorney-General’s Department | |
| AGL | Above Ground Level | ICAO/AIP |
| AH | After hours | AIS |
| AIC | Aeronautical Information Circular | AIP |
| AIDC | Air traffic services inter-facility data communications | ICAO |
| AIP | Aeronautical Information Publication | ICAO/AIP |
| AIRC | Aeronautical Information and Control | ICAO |
| AIRAC | Aeronautical Information Regulation and Control | ICAO/AIIP |
| AIREP | Air-Report | AIP/ICAO |
| AIRMET | Information in plain language concerning weather significant to light aircraft operations at or below 10,000FT | AIS |
| AIS | Aeronautical Information Service | AIP |
| AL | Approach Lights | AIS |
| ALA | Aircraft Landing Area (for purpose of CAR 1988 92(1)(d)) | AIP |
| ALA | Alighting area | ICAO |
| ALAEA | Australian Licensed Aircraft Engineers Association | |
| ALARP | As Low as Reasonably Practical | AIS |
| ALERFA | Alert phase | AIS |
| ALM | Aircraft Landing Minima | AIS |
| ALR | Alerting Message | AIS |
| ALRS | Approach lighting system | ICAO |
| ALS | Approach Lighting System | AIS |
| ALT | Altitude | AIS |
| ALTN | Alternate, Alternating (light alternates in colour) | AIS |
| ALTN | Alternate (aerodrome) | AIS |
| AMA | Area minimum altitude | ICAO |
| AMD | Amend, Amended | AIS |
| AMDT | Amendment (AIP amendment) | ICAO/AIP |
| AME | Aircraft Maintenance Engineer | Part 66 |
| AMM | Aircraft Maintenance Manual | WATOG |
| AMO | Approved Maintenance Organisation | |
| AMP | Aircraft Maintenance Program | Part 145 |
| AMRD | Australian Maintenance Requirements Document | Part 43 |
| AMS | Aircraft Maintenance Specialist | Part 145 |
| AMSL | Above Mean Sea Level | AIS |
| AMSS | Aeronautical mobile satellite service | ICAO |
| AMT | Aircraft Maintenance Technician | Part 66 |
| ANA | Air Navigation Act | |
| ANC | Aeronautical Chart 1:50 000 ( followed by name/title) | AIS |
| ANCS | Aeronautical navigation chart – small scale (followed by name/title and scale) | ICAO |
| ANS | Answer | ICAO |
| ANO | Air Navigation Order (now CAO) | |
| ANTA | Australian National Training Authority | Part 66 |
| AOC | Aerodrome Obstacle Chart (followed by name/title) | AIS/AIP |
| AOC | Air Operators Certificate | Part 119 |
| AOG | Aircraft On Ground | WATOG |
| AOPA | Aircraft Owners and Pilots Association | |
| AP | Airport | AIS |
| APAPI | Abbreviated Precision Approach Path Indicator (pronounced ‘AY-PAPI’) | AIS |
| APCH | Approach | AIS |
| APDC | Aircraft Parking/Docking Chart (followed by name/title) | AIS |
| APF | Australian Parachute Federation | |
| APMA | Australian Parts Manufacturer Approval | Part 21 |
| APN | Apron | ICAO/AIP |
| APP | Approach Control | AIS |
| APR | April | ICAO/AIP |
| APRX | Approximate, Approximately | AIS |
| APSG | After Passing | AIS |
| APU | Auxillary power unit | ICAO |
| APV | Approach with Vertical Guidance | |
| APV | Approve, Approved, Approval | AIS |
| AQZ | Area QNH Zone | AIS |
| ARC | Advance Regulatory Change (legislative change project) | CASA |
| ARC | Area Chart | ICAO/AIP |
| ARFFS | Aerodrome Rescue and Fire Fighting Service | Part 139 |
| ARFL | Aeroplane Reference Field Length | AIS |
| ARH | Aircraft Registration Holder | Part 47 |
| ARM | Airspace Risk Model | ICAO/CASA |
| ARM | Aircraft Recovery Manual | WATOG |
| ARN | Aviation Reference Number | CASA/AIP |
| ARNG | Arrange | AIS |
| ARO | Air traffic services reporting office | ICAO |
| ARP | Aerodrome reference point | ICAO/AIP |
| ARP | Air-Report (message type designator) | ICAO/AIP |
| ARQ | Automatic error correction | ICAO |
| ARR | Arrive, Arrival | AIS |
| ARS | Special Air-Report (message type designator) | AIS |
| ARST | Arresting (specify (part of) aircraft arresting equipment) | ICAO |
| AS | Altostratus (meteorological) | ICAO/AIP |
| AS | Australian Standard | |
| ASA | Australian Skydiving Association | |
| ASAC | Australian Sports Aviation Confederation | |
| ASAP | As Soon as Possible | AIS |
| ASC | Ascend to or ascending | ICAO |
| ASDA | Accelerate-stop distance available | ICAO |
| ASE | Airborne Support Equipment | WATOG |
| ASE | Altimetry System Error | ICAO/AIP |
| ASF | Aviation Safety Forum | AIS |
| ASI | Aviation Safety Index | |
| ASIR | Aviation Safety Incident Report | |
| ASRA | Australian Sport Rotorcraft Association | |
| ASR | Area Surveillance Radar | AIS |
| ASPH | Asphalt | ICAO |
| AT… | At (followed by time at which weather change is forecast to occur) | ICAO |
| ATA | Actual Time of Arrival | AIS |
| ATA | Air Transport Association | |
| ATC | Air Traffic Control (in general) | ICAO/AIP |
| ATD | Actual Time of Departure | AIS |
| ATE | Automatic Test Equipment | WATOG |
| ATEL/ANAV | Aeronautical Telecommunication and Radio Navigation Services | Part 171 |
| ATFM | Air Traffic Flow Management | AIS |
| ATIS | Automatic terminal information service | ICAO |
| ATM | Air traffic management | ICAO/AIP |
| ATN | Aeronautical telecommunications network | ICAO |
| ATO | Aviation Testing Officer | |
| ATP | At.. (time or place) | ICAO |
| ATPL | Airline Transport Pilot License | |
| ATS | Air Traffic Service(s) | Part 172 |
| ATSB | Australian Transport Safety Bureau | |
| ATSO | Australian Technical Standard Order | Part 21 |
| ATSOA | Australian Technical Standard Order Authorisation | Part 21 |
| ATTN | Attention | AIS |
| AUF | Australian Ultralight Federation | |
| AT-VASIS | Abbreviated ‘T’ Visual Approach Slope Indicator System (pronounced ‘AY-TEE-VASIS’) | AIS |
| ATZ | Aerodrome traffic zone | ICAO |
| AUG | August | AIS |
| AUTH | Authorised, Authorisation | AIS |
| AUW | All Up Weight | AIS |
| AUX | Auxiliary | AIS |
| AVM | Abrupt Vertical Manoeuvres (by the MIL) | AIS |
| AVBL | Available | AIS |
| AVG | Average | AIS |
| AVGAS | Aviation Gasoline | AIS |
| AWB | Airworthiness Bulletin | |
| AWIB | Aerodrome Weather Information Broadcast | AIS |
| AWK | Aerial Work (Air work – general aviation) | AIS |
| AWS | Automatic Weather Station | AIS |
| AWTA | Advise as to what time is available | ICAO |
| AWY | Airway | ICAO/AIP |
| AZM | Azimuth | ICAO/AIP |
| B | Blue | ICAO/AIP |
| BA | Braking action | ICAO |
| BASA | Bilateral Aviation Safety Agreement | |
| BASE | Cloud Base (met) | AIS |
| BASI | Bureau of Air Safety Investigation (now part of ATSB) | |
| BCFG | Fog Patches (met) | AIS |
| BCN | Beacon (aeronautical ground light) | AIS |
| BCST | Broadcast | AIS |
| BDRY | Boundary | AIS |
| BECMG | Becoming | AIS |
| BFR | Before | AIS |
| BITE | Built In Test Equipment | WATOG |
| BKN | Broken (cloud descriptor) (met) | AIS |
| BL… | Blowing (followed by DU=dust, SA=sand or SN=snow) | AIS |
| BLDG | Building | AIS |
| BLO | Below Clouds | AIS |
| BLW | Below | AIS |
| BOM | Bureau of Meteorology | AIS |
| BOMB | Bombing | AIS |
| BR | Mist | AIS |
| BRF | Short (used to indicate type of approach) | AIS |
| BRG | Bearing | AIS |
| BRKG | Braking | AIS |
| BRW | Brakes release weight | |
| BS | Broadcasting Station (Commercial) | AIS |
| BTL | Between Layers | AIS |
| BTN | Between | AIS |
| C | Degrees Celsius (Centigrade) | AIS |
| C | Centre (Runway) | AIS |
| CA/GRS | Certified Air/Ground Radio Service | Part 171 |
| CAA | Civil Aviation Authority | |
| CAA NZ | Civil Aviation Authority New Zealand | |
| CAAP | Civil Aviation Advisory Publication | CAR 1988 |
| CAGRO | Certified Air Ground Radio Operation | AIP |
| CAMP | Continuous Airworthiness Maintenance Program | Part 145 |
| CAO | Civil Aviation Order | |
| CAR 1988 | Civil Aviation Regulation (1988) [existing] | |
| CAR 1998 | Civil Aviation Regulation (1998) [revised] (to be known as CASR) | |
| CAS | Calibrated air speed | ICAO |
| CASR | Civil Aviation Safety Regulation (currently known as CAR 1998) | |
| CAT | Category | AIS |
| CAT | Clear Air Turbulence | AIS |
| CAVOK | Visibility, cloud and present weather better than prescribed values or conditions | AIS |
| CB | Cumulonimbus (met) | AIS |
| CC | Cirrocumulus (met) | AIS |
| CCA | Corrected meteorological message (for CCB, CCC..etc in sequence) (message type designator) | ICAO |
| CCTS | Circuits | AIS |
| CD | Candela | ICAO |
| CDL | Configuration Deviation List | Part 43 |
| CDN | Coordination (message type designator) | ICAO |
| CEN | En Route and Area ATC unit | AIS |
| CEO | Chief Executive Officer | |
| CET | Clearance Expiry Time | AIS |
| CF | Change Frequency to | AIS |
| CFI | Chief Flying Instructor | CAR 1988 |
| CFL | Cleared Flight Level | AIS |
| CFM | Confirm, I confirm | AIS |
| CG | Centre of gravity | ICAO |
| CGL | Circling guidance light(s) – This is a channel continuity check of transmission to permit comparision of your record of channel-sequence ICAO numbers of messages received on the channel (to be used in AFS as a procedure signal) | ICAO |
| CH | This is a channel continuity check of transmission to permit comparison of your record of channel-sequence numbers of messages received on the channel (to be used in AFS as a procedure signal) | ICAO |
| CHG | Modification (message type designator) | ICAO |
| CHTR | Charter | AIS |
| CI | Cirrus (met) | AIS |
| CIDIN | Common ICAO data interchange network | ICAO |
| CIT | Near, Over Large Town(s) | AIS |
| CIV | Civil | AIS |
| CK | Check | AIS |
| CL | Centre Line | AIS |
| CLA | Clear type of ice formation | AIS |
| CLBR | Calibration | AIS |
| CLD | Cloud (met) | AIS |
| CLG | Calling | AIS |
| CLIAS | Climbing Indicated Airspeed | AIS |
| CLR | Clear, Cleared to… Clearance | AIS |
| CLSD | Closed, Close, Closing | AIS |
| CM (cm) | Centimetre | AIS |
| CMB | Climb to or Climbing to | AIS |
| CMM | Component Maintenance Manual | WATOG |
| CMPL | Completion, Completed, or Complete | AIS |
| CMSD | Commissioned | AIS |
| CNL | Cancel | AIS |
| CNL | Flight plan cancellation message | AIS |
| CNS | Communications, Navigation and Surveillance | AIS |
| COA | Certificates of Approval (issued to maintenance organisations) | CAR 1988 |
| CoA | Certificate of Airworthiness | CAR 1988 |
| COM | Communications | AIS |
| CONC | Concrete | AIS |
| COND | Condition | AIS |
| CONS | Continuous | AIS |
| CONST | Construction, Constructed | AIS |
| CONT | Continue(s), Continued | AIS |
| COOR | Coordinate, Coordinated | AIS |
| COORD | Coordinates | AIS |
| COP | Change over point | ICAO |
| CoR | Certificate of Registration | CAR 1988 |
| COR | Correct, Corrected, Correction | AIS |
| COS | Conical Surface | AIS |
| COT | At the Coast, Coastal | AIS |
| COV | Cover, Covered, Covering | AIS |
| CP | Chief Pilot | CAR 1988 |
| CPDLC | Controller-Pilot Data Link Communication | ICAO/AIP |
| CPL | Commercial Pilot License | CAR 1988 |
| CPL | Current flight plan | ICAO |
| CRC | Cyclic redundancy check | ICAO |
| CRM | Crew Resource Management | Part 121 |
| CRZ | Cruise | AIS |
| CS | Cirrostratus (met) | AIS |
| CS | Call sign | AIS |
| CTA | Control Area | AIS Part172/AIP |
| CTAF | Common Traffic Advisory Frequency | |
| CTAM | Climb to and maintain | ICAO |
| CTC | Category Technical Competency | CAR 1988 |
| CTC | Contact | ICAO/AIP |
| CTL | Control | AIS |
| CTN | Caution | AIS |
| CTR | Control Zone | AIP |
| CU | Cumulus (met) | AIS |
| CUF | Cumuliform (met) | AIS |
| CUST | Customs | AIS |
| CVR | Cockpit voice recorder | ICAO/AIP |
| CW | Carrier Wave | ICAO |
| CWY | Clearway | AIS |
| D… | Danger Area (followed by identification) | AIS |
| D | Deleted | AIS |
| D | Downward (tendency in RVR (Runway visual range) during previous 10 minutes | ICAO |
| DA | Decision Altitude | AIS |
| DA/H | Decision Altitude/Height | AIP |
| DAME | Designated Aviation Medical Examiner | Part 67 |
| DAO | Designated Aviation Ophthamologist | Part 67 |
| DAP | Departure and Approach Procedures | AIP |
| D-ATIS | Data Link Automatic Terminal Information Service (pronounced’DEE-ATIS’) | AIS |
| DCA | Department of Civil Aviation (previous to CASA) | |
| DCD | Double channel duplex | ICAO |
| DCKG | Docking | AIS |
| DCMSD | Decommissioned | AIS |
| DCPC | Direct Controller-Pilot Communications | AIS |
| DCS | Double channel simplex | ICAO |
| DCT | Direct (in relation to flight plan clearances and type of approach) | AIS |
| DE | Form (used to preceed the call sign of the calling station) (to be used in AFS as a procedure signal) | ICAO/AIP |
| DEC | December | AIS |
| DEG | Degrees | AIS |
| DEP | Depart, Departure, Departed, Departing, Departure Message | AIS |
| DER | Departure End of Runway | AIP |
| DER | Designated Engineering Representative | FAR |
| DES | Descend to, Descending to | AIS |
| DEST | Destination | AIS |
| DETRESFA | Distress Phase | AIS |
| DEV | Deviation, Deviating | AIS |
| DF | Direction Finder/ Finding | AIS |
| DFDR | Digital Flight Data Recorder | AIS |
| DFTI | Distance from touchdown indicator | ICAO |
| DH | Decision Height | ICAO |
| DIF | Diffuse | AIS |
| DISP | Displaced | AIS |
| DIST | Distance | AIS |
| DIV | Diversion, Divert, Diverting | AIS |
| DLA | Delay (message type designator) | ICAO/AIP |
| DLIC | Data Link Initiation Capability | AIS |
| DLY | Daily | AIS |
| DMC | Direct Maintenance Cost | WATOG |
| DME | Distance Measuring Equipment | ICAO/AIP |
| DMEN | DME (International) | AIS |
| DMEP | DME (International Precision � used in conjunction with MLS) | AIS |
| DNG | Danger, Dangerous | AIS |
| DOC | Direct Operating Cost | WATOG |
| DOC | Documents | AIS |
| DOM | Domestic | AIS |
| DOTARS | Department of Transport and Regional Services | |
| DP | Dew Point Temperature | ICAO/AIP |
| DP | Discussion Paper | CASA |
| DPT | Depth | AIS |
| DR | Dead Reckoning (navigation) | ICAO |
| DR… | Low drifting (followed by DU=dust, SA=sand or SN=snow) | AIS |
| DRG | During | AIS |
| DS | Dust storm | AIS |
| DSB | Double sideband | ICAO |
| DTAM | Descend to And Maintain | AIS |
| DTG | Date-Time Group | AIS |
| DTHR | Displaced Runway Threshold | AIS |
| DTRT | Deteriorate, Deteriorating | AIS |
| DTW | Dual tandem wheels | ICAO |
| DU | Dust | AIS |
| DUPE | This is a duplicate message (to be used in AFS as a procedure signal) | ICAO |
| DUR | Duration | AIS |
| DUC | Dense Upper Cloud (met) | AIS |
| D-VOLMET | Data Link VOLMET | AIS |
| DVOR | Doppler VOR | AIS |
| DW | Dual wheels | ICAO |
| DZ | Drizzle | AIS |
| E | East, East Longitude | AIS |
| EAT | Expected Approach Time | AIS |
| EB | Eastbound | AIS |
| E E E | Error (to be used in AFS as a procedure signal) | ICAO |
| EET | Estimated Elapsed Time | AIS |
| EFC | Expect further clearance | ICAO |
| EGPWS | Enhanced Ground Proximity Warning System | CAR 1988 |
| EHF | Extremely high frequency (30,000 to 300,000 MHz) | ICAO/AIP |
| EHR | Encumbrance Holder Register | Part 47 |
| ELBA | Emergency locator beacon-aircraft | ICAO |
| ELEV | Elevation | AIS |
| ELR | Extra Long Range | AIS |
| ELT(S) | Emergency Locator Transmitter (Survival) | CAR 1988 |
| EM | Engine Manual | WATOG |
| EM | Explanatory Memorandum (submitted to EXCO with regulation amendment) | |
| EM | Emission | AIS |
| EMBD | Embedded in a Layer (to indicate cumulonimbus embedded in layers of other clouds) | AIS |
| EMERG | Emergency | AIS |
| EMS | Emergency Medical Service | |
| END | Stop-end (related to RVR) | ICAO |
| ENDCE | Endurance | AIS |
| ENE | East North-East | AIS |
| ENG | Engine | AIS |
| ENR | En Route | AIS |
| ENRC | En Route Chart (followed by name/title) | AIS |
| EOBT | Estimated off Blocks Time | AIS |
| EPA | Environment Protection Agency | |
| EPIRB | Electronic Position Indicating Radio Beacon (marine term.) | AIS |
| EQPT | Equipment | AIS |
| ER | Here..or herewith | ICAO |
| ERC | En Route Chart | AIS |
| ERSA | Enroute Supplement Australia | AIP |
| ES | Explanatory Statement (tabled with regulations in Parliament) | |
| ESD | Electrostatic sensitive discharge | |
| ESDE | ESD equipment | |
| ESE | East Southeast | AIS |
| ESIR | Electronic safety incident report | |
| EST | Estimate or estimated or estimate (message type designator) | AIS |
| ETA | Estimated Time of Arrival, Estimating Arrival | AIS |
| ETCM | Engine trend and condition monitoring | |
| ETD | Estimated Time of Departure, Estimating Departure | AIS |
| ETO | Estimated Time Over significant point | AIS |
| ETOPS | Extended range operations by turbine-engined aeroplanes | ICAO |
| EV | Every | AIS |
| EXC | Except | AIS |
| EXCO | Executive Council | |
| EXCOS | Executive Council Secretariat | |
| EXER | Exercises, Exercising, to exercise | AIS |
| EXP | Expect, Expected, Expecting | AIS |
| EXTD | Extend, Extending, Extended | AIS |
| F | Fixed (chart symbol) | AIS |
| FAA | Federal Aviation Administration of the USA | |
| FAAOC | Foreign Aircraft Air Operator’s Certificate | Part 129 |
| FAC | Facility, Facilities | AIS |
| FAF | Final Approach Fix | AIP/ICAO |
| FAL | Facilitation of International Air | AIS |
| FAP | Final Approach Point | AIP/ICAO |
| FARs | Federal Aviation Regulations (Federal Aviation Administration, Department of Transportation, USA) | |
| FATO | Final approach and take-off area | ICAO/AIP |
| FAWP | Final Approach Waypoint | AIS |
| FAX | Facsimile Transmission | AIS |
| FBL | Light (used to indicate the intensity of WX phenomena, interference or static reports, eg BL RA = light rain) | AIS |
| FC | Funnel Cloud (tornado or water spout) | AIS |
| FCST | Forecast | AIS |
| FCT | Friction coefficent | ICAO |
| FDE | Fault detection and exclusion (in relation to GPS equipment) | |
| FDL | Fixed Distance Lighting | AIS |
| FDPS | Flight Data Processing System | AIS |
| FEB | February | AIS |
| FEW | Few (cloud descriptor) | AIS |
| FMS | Flight Management System | AIS |
| FFR | Flood, Fire Relief | AIS |
| FG | Fog | AIS |
| FIA | Flight Information Area | AIS |
| FIC | Flight Information Centre | AIS |
| FIO | Flight Information Office | AIS |
| FIR | Flight Information Region | ICAO/AIP |
| FISA | Flight information service (automated) | ICAO |
| FISS | Flight Information Service Station | AIS |
| FIX | Fault Isolation Manual | WATOG |
| FL | Flight Level | ICAO/AIP |
| FLD | Field | AIS |
| FLG | Flashing | AIS |
| FLR | Flares | AIS |
| FLT | Flight | ICAO/WATOG/AIP |
| FLTCK | Flight check | ICAO/AIP |
| FLUC | Fluctuating, fluctuation, flutucated | AIS |
| FLW | Follow(s), Following | AIS |
| FLY | Fly, Flying | AIS |
| FM | From | AIS |
| FM… | From (followed by time weather change is forecast to begin) | AIS |
| FMS | Fatigue management system | CAR 1998 |
| FMS | Flight Management System | ICAO |
| FMU | Flow Management Unit | WATOG |
| FNA | Final Approach | AIS |
| FNPT | Flight and Navigation Procedures Trainer | ICAO |
| FOD | Foreign Object Damage | WATOG |
| FPD | Flight Plan Designator | AIS |
| FPL | Filed Flight Plan Message | AIS |
| FPM | Feet per minute | AIS |
| FPR | Flight Plan Route | AIS |
| FR | Fuel Remaining | AIS |
| FREQ | Frequency | AIS |
| FRI | Friday | ICAO |
| FRM | Fault Reporting Manual | WATOG |
| FRNG | Firing | AIS |
| FRONT | Front (relating to weather) | ICAO |
| FRQ | Frequent | AIS |
| FS | Flight Service (in general) | AIS |
| FSL | Full Stop Landing | AIS |
| FSP | Fish Spotting | AIS |
| FSS | Flight service station | ICAO |
| FST | First | AIS |
| FT | Feet | AIS |
| FTD | Flight training device | Part 60 |
| FTE | Full time equivalent | |
| FU | Smoke | AIS |
| FXD | Fixed | AIS |
| FZ | Freezing | AIS |
| FZDZ | Freezing Drizzle | AIS |
| FZFG | Freezing Fog | AIS |
| FZL | Freezing Level | AIS |
| FZRA | Freezing Rain | AIS |
| G | Green | AIS |
| GA | Go ahead, resume sending (to be used in AFS as a procedure signal) | ICAO |
| GA | General Aviation | CAR 1988 |
| G/A | Ground-to-air | ICAO |
| GAAP | General Aviation Aerodrome Procedures | AIS |
| G/A/G | Ground-to-air and air-to-ground | ICAO |
| GAMET | Area forecast for low-level flights | ICAO |
| GBAS | Ground Based Augmentation System | |
| GCA | Ground Controlled Approach | AIS |
| GCN | General Computing Network (operated by Airservices Australia) | AIS |
| GEN | General | AIS |
| GEO | Geographic, true | AIS |
| GES | Ground Earth Station | AIS |
| GFA | The Gliding Federation of Australia | |
| GFY | Glider Flying | AIS |
| G-G | Governor-General | |
| GHA | Ground handling agents | |
| GLD | Glider | AIS |
| GLONASS | Global Orbiting Navigation Satellite System (pronounced ‘GLO-NAS’) | AIS |
| GMC | Ground Movement Chart (followed by name/title) | AIS |
| GND | Ground | AIS |
| GNDCK | Ground Check | AIS |
| GNS | Global Navigation System | AIS |
| GNSS | Global navigation satellite system | ICAO/AIP |
| GP | Guiding principles | CAR 1998 |
| GP | Glide Path | ICAO/AIP |
| GP | FLG Group Flashing (number) (used in conjunction with aerodrome lighting) | AIS |
| GPI | Glide Path Intercept | AIS |
| GPS | Global positioning system | |
| GPWS | Ground proximity warning system | |
| GR | Hail | AIS |
| GRAD | Minimum Required Climb Gradient | AIS |
| GRAS | Ground Based Regional Augmentation System | |
| GRASS | Grass Landing Area | AIS |
| GRIB | Processed meteoroglogical data in the form of gridpoint values expressed in binary form (aeronautical meterological code) | ICAO/AIP |
| GRVL | Gravel | AIS |
| GS | Groundspeed | AIS |
| GS | Small Hail and/or Snow Pellets | AIS |
| GSE | Ground Support Equipment | WATOG |
| GUND | Geoid Undulation | AIS |
| H24 | Continuous day and night service | AIS |
| HAA | Height Above Aerodrome | AIS |
| HAA | Helicopter Association of Australia | |
| HAM | Head of Aircraft Maintenance | Part 145 |
| HAMC | Head of Aircraft Maintenance Control | Part 145 |
| HAPI | Helicopter approach path indicator | ICAO |
| HAT | Height Above Threshold | AIS |
| HBN | Hazard Beacon | AIS |
| HDF | High frequency direction-finding station | ICAO |
| HDG | Heading | AIS |
| HDS | Hours of Daylight Saving | AIS |
| HEL | Helicopter | AIS |
| HF | High Frequency (3000 to 30,000 KHZ) | AIS |
| HGFA | Hang Gliding Federation of Australia Inc | |
| HGT | Height, Height Above | AIS |
| HIAL | High Intensity Approach Lighting | AIS |
| HIOL | High Intensity Obstacle Lights | AIS |
| HIRL | High Intensity Runway Lighting | AIS |
| HJ | Sunrise to Sunset | AIS |
| HLDG | Holding | AIS |
| HLS | Helicopter Landing Site | AIS |
| HN | Sunset to Sunrise | AIS |
| HO | Service available to meet operational requirements | AIS |
| HOL | Holiday | |
| HOSP | Hospital Aircraft | AIS |
| HPA | HectoPascal | AIS |
| HR | Hours | AIS |
| HS | Homestead | AIS |
| HS | Service available during hours of scheduled operations | AIS |
| HSL | Hold Short Lights | AIS |
| HURCN | Hurricane | AIS |
| HVDF | High and very high frequency direction finding station (at the same locations) | AIS |
| HVY | Heavy | AIS |
| HVY | Heavy (used to indicate the intensity of WX phenomena, eg HVY RA = heavy rain) | AIS |
| HX | No specific working hours | AIS |
| HYR | Higher | AIS |
| HZ | Haze | AIS |
| HZ (hz) | Hertz | AIS |
| HZS | Horizontal Surface | AIS |
| IA | Inspection authorisation | FAR |
| IAC | Instrument approach chart (followed by name/title) | ICAO/AIP |
| IAF | Initial Approach Fix | AIS |
| IAL | Instrument Approach and Landing Chart | AIS |
| IAO | In and out of clouds | AIS |
| IAR | Intersection of air routes | ICAO |
| IAS | Indicated air speed | ICAO |
| IATA | International Air Transport Association | |
| IAW | In Accordance With | |
| IAWP | Initial Approach Way-point | AIS |
| IBN | Identification Beacon | AIS |
| IC | Ice Crystals (MET code) | AIS |
| ICA | Instructions for continuing airworthiness (issued by manufacturer or designer) | CAR 1998 |
| ICAO | International Civil Aviation Organization | ICAO |
| ICE | Icing, Ice | AIS |
| ID | Identifier, identify | AIS |
| IDENT | Identification | AIS |
| IF | Intermediate Approach Fix | AIS |
| IFF | Identification Friend/Foe | AIS |
| IFR | Instrument flight rules | ICAO/AIP/AIPICAO |
| IGA | International general aviation | AIS |
| ILS | Instrument Landing System | AIS |
| IM | Inner Marker | AIS |
| IMG | Immigration | AIS |
| IMPR | Improve, Improving, Improvement | AIS |
| IMT | Immediate, Immediately | AIS |
| IMC | Instrument meteorological conditions (other than VMC) | CAR 1988 |
| IMC | Indirect Maintenance Cost | WATOG |
| IMI | Interrogation sign | ICAO |
| INA | Initial approach | ICAO |
| INBD | Inbound | AIS |
| INC | In Cloud | AIS |
| INCERFA | Uncertainty Phase | AIS |
| INFO | Information | AIS |
| INOP | Inoperative | AIS |
| INP | If not possible | ICAO |
| INPR | In progress | ICAO |
| INS | Inertial Navigation System | AIS |
| INSTL | Install, Installed, Installation | AIS |
| INSTR | Instrument | AIS |
| INT | Intersection | AIS |
| INTER | Intermittent, Intermittently | AIS |
| INTL | International | AIS |
| INTRG | Interrogator | AIS |
| INTRP | Interrupt, Interruption, Interrupted | AIS |
| INTSF | Intensify, Intensifying | AIS |
| INTST | Intensity | AIS |
| IoA | Instrument of appointment | CAR 1988 |
| IOC | Indirect Operating Cost | WATOG |
| IPC | Illustrated Parts Catalogue | WATOG |
| IR | Ice on runway | ICAO |
| ISA | International Standard Atmosphere | AIS |
| ISB | Independent Sideband | AIS |
| ISOL | Isolated | AIS |
| IWI | Illuminated Wind Indicator | AIS |
| IWP | Intermediate Way-point | AIS |
| JAA | Joint Aviation Authorities (of Europe) | AIS |
| JAN | January | AIS |
| JAR | Joint Aviation Requirements (of the European JAA) | AIS |
| J-BAR | Jet Barrier | AIS |
| JF | Saturday, Sunday and PH | AIS |
| JO | Monday to Friday except PH | AIS |
| JTST | Jet Stream | AIS |
| JUL | July | AIS |
| JUN | June | AIS |
| KG (kg) | Kilograms | AIS |
| KHZ (kHz) | Kilohertz | AIS |
| KM (km) | Kilometers | AIS |
| KMH (km/h) | Kilometers per Hour | AIS |
| KPA (kPa) | Kilopascals | AIS |
| KT (kt) | Knots | AIS |
| KW (kw) | Kilowatts | AIS |
| L | Left (runway identification) | AIS |
| L | Locator (see LM, LO) | AIS |
| LAHSO | Land and Hold Short Operations | AIS |
| LAME | Licensed Aircraft Maintenance Engineer | Part 66 |
| LAN | Inland | AIS |
| LAT | Latitude | AIS |
| LDA | Landing distance available | ICAO/AIP |
| LDG | Landing | AIS |
| LDI | Landing Direction Indicator | AIS |
| LDP | Landing decision point | ICAO |
| LEN | Length | AIS |
| LF | Low Frequency (30 to 300 KHZ) | AIS |
| LGT | Light, Lighting | AIS |
| LGTD | Lighted | AIS |
| LIH | Light Intensity High | AIS |
| LIL | Light Intensity Low | AIS |
| LIM | Light Intensity Medium | AIS |
| LIOL | Low Intensity Obstacle Lights | AIS |
| LIRL | Low Intensity Runway Lights | AIS |
| LJR | Low Jet Route | AIS |
| LLN | Low Level Navigation (by the MIL) | AIS |
| LLO | Low Level Operations (by the MIL) | AIS |
| LL | Lower Limits | AIS |
| LLZ | Localizer | AIS |
| LM | Locator (middle) | AIS |
| LMT | Local mean time | AIS |
| LO | Locator (outer) | AIS |
| LOC | Locally, Location, Located, Local | AIS |
| LOE | Lane of Entry | AIS |
| LONG | Longitude | AIS |
| LRG | Long Range | AIS |
| LRCS | Long-range communication system | FAR |
| LRI | Line Replaceable Item | WATOG |
| LRNS | Long-range navigation system | FAR |
| LRU | Line Replaceable Unit | WATOG |
| LSALT | Lowest safe altitude | |
| LTD | Limited | AIS |
| LUL | Lowest Usable Level | AIS |
| LV | Light and Variable (relating to wind) | AIS |
| LVE | Leave, Leaving | AIS |
| LVL | Level | AIS |
| LYR | Layer, Layered | AIS |
| M (m) | Metres (preceded by figures) | AIS |
| M | Mach number (followed by figures) | AIS |
| MAE | Men and Equipment | AIS |
| MAG | Magnetic | AIS |
| MAHWP | Missed Approach Holding Way-point | AIS |
| MAINT | Maintenance | AIS |
| MAN | Manual | AIS |
| MAP | Aeronautical Maps and Charts | AIS |
| MAPT | Missed Approach Point | ICAO/AIP |
| MAR | At Sea | AIS |
| MAR | March | AIS |
| MAWP | Missed Approach Waypoint | AIS |
| MAX | Maximum | AIS |
| MBST | Microburst | AIS |
| MBZ | Mandatory Broadcast Zone | AIP |
| MCM | Maintenance control manual | Part 145 |
| MCQFS | Manual of criteria for the qualification of flight simulators ICAO Doc 9625-AN/938 | Part 60 |
| MCUR | Mean Cycles Between Unscheduled Removals | WATOG |
| MCW | Modulated Continuous Wave | AIS |
| MDA | Minimum Descent Altitude | AIS |
| MDF | Medium Frequency Direction Finding Station | AIS |
| MDR | Major Defect Report | CAR 1988 |
| MEA | Minimum En-route Altitude | AIS |
| MED | Medical | AIS |
| MEL | Minimum equipment list | ICAO |
| MERSITAB | Manufacturing, Engineering and Related Services Industry Training Advisory Body | Part 66 |
| MET | Meteorological, Meteorology | AIS |
| METAR | Aviation routine weather report (in aeronautical meteorological code) | AIS |
| METRAD | MET Radar | AIS |
| MET | REPORT Aviation routine weather report | AIS |
| MF | Medium Frequency (300 to 3000 KHZ) | AIS |
| MHZ (mhz) | Megahertz | AIS |
| MIFG | Shallow Fog | AIS |
| MIL | Military | AIS |
| MIN | Minutes | AIS |
| MIOL | Medium Intensity Obstacle Lights | AIS |
| MIRL | Medium Intensity Runway Lights | AIS |
| MISC | Miscellaneous | AIS |
| MKR | Marker Radio Beacon | AIS |
| MLJ | Military Low Jet | AIS |
| MLJR | Military Low Jet Route | AIS |
| MLS | Microwave Landing System | AIS |
| MLW | Maximum Landing Weight | AIS |
| MM | Middle Marker | AIS |
| MMEL | Master minimum equipment list | ICAO |
| MNM | Minimum | AIS |
| MNT | Monitor, Monitoring, | AIS |
| MNTN | Maintain, Maintained, Maintaining | AIS |
| MOA | Military Operating Area | AIS |
| MOC | Minimum obstacle clearance (required) | ICAO/AIP |
| MOD | Moderate, Moderately (used to indicate the intensity of WX phenomena, interference or static reports, eg MOD RA = moderate rain). | |
| MON | Above Mountains | AIS |
| MON | Monday | AIS |
| MOPS | Minimum Operational Performance Standards | AIS |
| MOS | Manual of Standards | CAR 1998 |
| MOU | Memorandum of understanding | |
| MOV | Move, Moved, Moving, Movement | AIS |
| MOWP | Method of Working Plan | AIS |
| CAR 1998 | Maintenance Program | |
| MPD | Maintenance Planning Data | ATA/FAR |
| MPS | Metres per Second | AIS |
| MRG | Medium Range | AIS |
| MRO | Maintenance, repair and overhaul | Part 145 |
| MRP | ATS/MET Reporting Point | AIS |
| MS | Minus | AIS |
| MSA | Minimum sector altitude | AIP |
| MSG | Message | AIS |
| MSG | Maintenance Steering Group | ATA/FAR |
| MSI | Maintenance Significant Item | WATOG |
| MSL | Mean Sea Level | AIS |
| MSSR | Monopulse Secondary Surveillance Radar | AIS |
| MSOS | Maintenance specific operation specification | Part 145 |
| MT | Mountain | AIS |
| MTBF | Mean Time Between Failure | WATOG |
| MTBR | Mean Time Between Removals | WATOG |
| MTBUR | Mean Time Between Unscheduled Removals | WATOG |
| MTO | Maintenance training organisation | Part 147 |
| MTOW | Maximum take-off weight | AIP |
| MTP | Maximum Tyre Pressure | AIS |
| MTTF | Mean Time To Failure | WATOG |
| MTTR | Mean Time To Repair | WATOG |
| MTTUR | Mean Time To Unscheduled Removal | WATOG |
| MTUR | Special Term For Data Transmittal | WATOG |
| MTW | Mountain waves | AIS |
| MRB | Maintenance Review Board | ATA/FAR |
| MVA | Minimum Vector Altitude | AIS |
| MWO | Meteorological Watch Office | AIS |
| MX | Mixed type of ice formation (white and clear) | AIS |
| N | North, North Latitude | AIS |
| NAA | National Airworthiness Authority (for a country other than Australia) | CAR 1998 |
| NAIPS | National aeronautical information processing system | AIP |
| NAP | Noise Abatement Procedures | AIS |
| NASC | National AIS System Centre | AIS |
| NAT | NAVAID Training | AIS |
| NAV | Navigation | AIS |
| NAVAID | Navigation Aid | AIS |
| NB | Northbound | AIS |
| NBFR | Not Before | AIS |
| NC | No Change | AIS |
| NDB | Non Directional Radio Beacon | AIS |
| NDT | Non-destructive testing | CAR 1988 |
| NE | Northeast | AIS |
| NEG | Negative, No, permission not granted, or, that is not correct | AIS |
| NGT | Night | AIS |
| NIL | None | AIS |
| NM | Nautical Miles | AIS |
| NML | Normal | AIS |
| NNE | North North-East | AIS |
| NNW | North North-West | AIS |
| NOF | International NOTAM Office | AIS |
| NOSIG | No Significant Change | AIS |
| NOTAM | Notice To Airmen | AIP |
| NOZ | Normal Operating Zone | AIS |
| NOV | November | AIS |
| NPA | Non-precision approach (procedures at aerodromes) | AIS |
| NPC | Notice of proposed change (consultation for amendment to a MOS) | CAR 1998 |
| NPRM | Notice of proposed rule making | CASA |
| NSC | Nil Significant Cloud | AIS |
| NTA | No TAF Amendment | AIS |
| NTL | National | AIS |
| NTZ | No-transgression zone | AIP/ICAO |
| NVET | National vocational education and training | Part 66 |
| NVG | Night Vision Goggles (by the MIL) | AIS |
| NW | North-West | AIS |
| NXT | Next | AIS |
| NZ | New Zealand | AIS |
| NZ CAA | New Zealand Civil Aviation Authority | AIS |
| O | Outside Air Temperature | AIS |
| P…. | Prohibited Area (followed by identification) | AIS |
| PAL | Pilot Activated Lighting | AIS |
| PANS | Procedures for Air Navigation Services | AIS |
| PANS-OPS | Procedures for Air Navigation Services – Aircraft Operations (ICAO Doc 8168 Vol I & II) | ICAO |
| PAPI | Precision Approach Path Indicator | AIS |
| PAR | Precision Approach Radar | AIS |
| PARL | Parallel | AIS |
| PATC | Precision Approach Terrain Chart (followed by name/title) | AIS |
| PAX | Passengers | AIS |
| PBM | Power Plant Build-Up Manual | WATOG |
| PCD | Proceed, Proceeding | AIS |
| PCN | Pavement classification number | ICAO/AIP |
| PCT | Practical consolidation training | Part 66 |
| PCL | Pilot Controlled Lighting | AIS |
| PDC | Pre-Departure Clearance | AIS |
| PDO | Product distribution organisation | Part 144 |
| PEC | Pressure Error Correction | AIS |
| PERM | Permanent | AIS |
| PFC | Porous Friction Course | AIS |
| PH | Public Holiday | AIS |
| PFR | Preferred Route | AIS |
| PIB | Pre-flight information bulletin | ICAO/AIP |
| PIC | Pilot-in-command | CAR 1988 |
| PIFR | Private IFR rating | CAR 1988 |
| PILS | Practice ILS | AIS |
| PIREP | Pilot Reports | WATOG |
| PJE | Parachute Jumping Exercise | AIS |
| PL | Ice Pellets | AIS |
| PLN | Flight Plan | AIS |
| PLVL | Present Level | AIS |
| PMP | Primary Maintenance Process | WATOG |
| PN | Prior Notice Required | AIS |
| PNR | Point of No Return | AIS |
| PO | Dust Devils | AIS |
| POB | Persons on Board | AIS |
| POSS | Possible | AIS |
| PPI | Plan Position Indicator | AIS |
| PPL | Private Pilot License | CAR 1988 |
| PPR | Prior Permission Required | AIS |
| PPSN | Present Position | AIS |
| PRD | Prohibited, Restricted and Danger Areas | AIS |
| PRFG | Aerodrome Partially Covered by Fog (MET code) | AIS |
| PRM | Precision Runway Monitoring | AIS |
| PRI | Primary | AIS |
| PRKG | Parking | AIS |
| PRM | Precision runway monitoring | AIP |
| PROB | Probable, Probability | AIS |
| PROC | Procedure | AIS |
| PROV | Provisional | AIS |
| PS | Plus | AIS |
| PSG | Passing | AIS |
| PSN | Position | AIS |
| PSP | Pierced Steel Plank | AIS |
| PSR | Primary Surveillance Radar | AIS |
| PSYS | Pressure System(s) | AIS |
| PTBL | Portable | AIS |
| PTN | Procedure Turn | AIS |
| PVT | Private | AIS |
| PWR | Power | AIS |
| QDM | Magnetic Heading (zero wind) | AIP |
| QDR | Magnetic Bearing | AIP |
| QEC | Quick Engine Change Unit | WATOG |
| QNH | Altimeter subscale setting to obtain elevation or altitude | AIS |
| QTE | True Bearing | AIP |
| QTG | Qualification test guide | |
| QUAD | Quadrant | AIS |
| R | Red | AIS |
| R…. | Restricted Area (followed by number) | AIS |
| R | Right (runway system identification) | AIS |
| RA | Rain | AIS |
| RAC | Rules of the Air and Air Traffic Services | AIS |
| RAD | Radius | AIS |
| RAeS | Royal Aeronautical Society | |
| RAFC | Regional Area Forecast Centre | AIS |
| RAG | Ragged | AIS |
| RAG | Runway Arresting Gear | AIS |
| RAIM | Receiver autonomous integrity monitoring | AIP/ICAO |
| RAI | Runway Alignment Indicator | AIS |
| RAIM | Receiver Autonomous Integrity Monitoring | AIS |
| RAPAC | Regional Airspace Users Advisory Committee | |
| RAPIC | Radar Picture (MET) | AIS |
| RAS | Radar Advisory Service | AIS |
| RASC | Regional AIS System Centre | AIS |
| RCA | Reach Cruising Altitude, | AIS |
| RCA | Request For Corrective Action | AIS |
| RCC | Rescue Coordination Centre | AIS |
| RCH | Reach, Reaching | AIS |
| RCL | Runway Centre Line | AIS |
| RCLL | Runway Centre Line Lights | AIS |
| RCLM | Runway Centre Line Marking | AIS |
| RDL | Radial | AIS |
| RDO | Radio | AIS |
| RE… | Recent (used to qualify weather phenomena, eg RERA = recent rain) | AIS |
| REC | Receive, Receiver, Received | AIS |
| REDL | Runway Edge Lights | AIS |
| REF | Reference to… Refer to… | AIS |
| REG | Registration | AIS |
| RENL | Runway End Lights | AIS |
| REP | Report, Reported, Reporting, Reporting Point | AIS |
| REQ | Request, Requested | AIS |
| RERTE | Re Route | AIS |
| RES | Reserve Fuel | AIS |
| RESA | Runway end safety area | ICAO/AIP |
| RESTR | Restrictions | AIS |
| REV | Review | AIS |
| RFC | Request for change | |
| RFC | Regional Forecasting Centre (Met) | AIS |
| RFACA | Royal Federation of Aero Clubs of Australia | |
| RFFS | Rescue and Fire Fighting Services | AIS |
| RFP | Regulatory Framework Program (superceded by RRP) | CASA |
| RH | Radio Height | AIS |
| RHC | Right Hand Circuit | AIS |
| RIF | Reclearance in Flight | AIS |
| RIS | Regulation Impact Statement | ORR |
| RIS | Radar information service | AIP/ICAO |
| RL | Report Leaving | AIS |
| RLA | Relay to | AIS |
| RLLS | Runway Lead-in Lighting | AIS |
| RMIT | Royal Melbourne Institute of Technology | |
| RMK | Remark(s) | AIS |
| RNAV | Area navigation | AIP |
| RNP | Required navigation performance | |
| RO | Registered operator | Part 43 |
| ROBEX | Regional OPMET Bulletin Exchanges | AIS |
| ROC | Rate of Climb | AIS |
| ROD | Rate of Descent | AIS |
| ROFOR | Route Forecast (in aeronautical meteorological code) | AIS |
| RPA | Rules and practices for aerodromes | CAR 1988 |
| RPI | Radar Position Indicator | AIS |
| RPI | Regulatory Performance Indicator | CAR 1988 |
| RPI | Runway Point of Intercept | AIS |
| RPL | Recognition of prior learning | Part 66 |
| RPT | Regular public transport | CAR 1988 |
| RQ | Require(d) | AIS |
| RQMNTS | Requirements | AIS |
| RR | Report Reaching | AIS |
| RRP | Regulatory Reform Program | CASA |
| RRPI | Regulatory Reform Programme Implementation | CASA |
| RSC | Rescue Sub-Centre | AIS |
| RSCD | Runway Surface Condition | AIS |
| RSP | Responder Beacon | AIS |
| RSR | En route Surveillance Radar | AIS |
| RSVP | Regulatory Structure and Validation Project (superceded by RFP) | CASA |
| RTE | Route | AIS |
| RTF | Radio Telephone | AIS |
| RTIL | Runway Threshold Identification Lights | AIS |
| RTHL | Runway Threshold Light(s) | AIS |
| RTN | Return, Returned, Returning | AIS |
| RTS | Return to Service | AIS |
| RTZL | Runway Touchdown Zone Light(s) | AIS |
| RTO | Rejected take off | AIP |
| RTO | Registered training organisation | Part 147 |
| RVR | Runway visual range | AIP/ICAO |
| RVSM | Reduced Vertical Separation MinimuM | ICAO/CAR1988 |
| RWS | Runway Strip | AIS |
| RWY | Runway | AIS |
| S | South, South Latitude | AIS |
| SA | Sand | AIS |
| SAAA | Sport Aircraft Association of Australia | |
| SAL | Supplementary Airline License | AIS |
| SALS | Simple Approach Lighting System | AIS |
| SARPs | Standards and recommended practices (ICAO) | ICAO |
| SAR | Search and Rescue | AIS |
| SARTIME | Time search action required | AIS |
| SAT | Saturday | AIS |
| SATCOM | Satellite Communication | AIS |
| S/B | Service Bulletin | WATOG |
| SB | Southbound | AIS |
| SBAS | Satellite Based Augmentation System | |
| SC | Stratocumulus | AIS |
| SCC | Standards Consultative Council | CASA |
| SCT | Scattered | AIS |
| SDBY | Standby | AIS |
| SDC | Standard Departure Clearance | AIS |
| SDR | Service difficulty report | CAR 1998 |
| SE | South East | AIS |
| SEA | Sea (used in connection with sea-surface temperature and state of the sea) | AIS |
| SEACO | Single engine aircraft only | |
| SEC | Seconds | AIS |
| SECN | Section | AIS |
| SECT | Sector | AIS |
| SELCAL | Selective Calling System | AIS |
| SEP | September | AIS |
| SER | Service, Servicing, Served | AIS |
| SEV | Severe (used eg to qualify icing and turbulence report) | AIS |
| SFC | Surface | AIS |
| SFL | Sequenced Flashing Lights | AIS |
| SG | Snow Grains | AIS |
| SH… | Showers (followed by RA=rain, SN=snow, PL=icepellets, GR=hail, GS=small hail and snow pellets or combinations thereof, eg, SHRASN = showers of rain and snow) | AIS |
| SHF | Super High Frequency (3,000 to 30,000 MHZ) | AIS |
| S-I | Straight-In | AIP |
| SID | Standard instrument departure | ICAO/AIP |
| SIF | Selective Identification | AIS |
| SIG | Significant | AIS |
| SIGMET | Information concerning en route weather phenomena which could affect the safety of aircraft operations | AIS |
| SIMUL | Simultaneous, or Simultaneously | AIS |
| SKC | Sky Clear | AIS |
| SKED | Schedule, Scheduled | AIS |
| SLP | Speed Limiting Point | AIS |
| SLW | Slow, Slowly | AIS |
| SMC | Surface Movement Control | AIS |
| SMR | Surface Movement Radar | AIS |
| SMS | Safety management system | CAR 1998 |
| SN | Snow | AIS |
| SNOWTAM | A special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush and ice on the movement area | AIS |
| SOC | Start of Climb | AIS |
| SOE | Schedule of experience | CAR 1988 |
| SOM (SoM) | System of Maintenance | CAR 1998 |
| SOR | Summary of responses (to DP or NPRM) | CASA |
| SOT | Start of TORA (take-off) | AIS |
| SP | Single Pilot | AIS |
| SPA | Sport Aviation | AIS |
| SPECI | Aviation Special Weather (in aeronautical meteorological code) | AIS |
| SPFIB | Specific Preflight Information Bulletin | AIS |
| SPOT | Spotwind | AIS |
| SQ | Squall | AIS |
| SR | Sunrise | AIS |
| SRD | Standard Radar Departure | AIS |
| SRG | Short Range | AIS |
| SRM | Structural Repair Manual | WATOG |
| SRR | Search and Rescue Region | AIS |
| SRY | Secondary | AIS |
| SS | Sandstorm | AIS |
| SS | Sunset | AIS |
| SSB | Single Sideband | AIS |
| SSE | South South-East | AIS |
| SSI | Structural Significant Item | WATOG |
| SSM | System Schematics Manual | WATOG |
| SSR | Secondary Surveillance Radar | AIS |
| SST | Supersonic Transport | AIS |
| SSW | South South-West | AIS |
| ST | Stratus | AIS |
| STA | Straight in Approach | AIS |
| STAR | Standard Arrival Route | AIP |
| STAR | Standard instrumental arrival | ICAO |
| STARs | Standard terminal arrival routes | |
| STC | Supplemental Type Certificate | Part 21 |
| STD | Synthetic training device | Part 60 |
| STD | Standard | AIS |
| STF | Stratiform | AIS |
| STN | Station | AIS |
| STNR | Stationary | AIS |
| STODA | Supplementary Take-off Distance | AIS |
| STOL | Short Take-off and Landing | AIS |
| STS | Status | AIS |
| STWL | Stopway Light(s) | AIS |
| SUBJ | Subject to | AIS |
| SUN | Sunday | AIS |
| SUP | Supplement (AIP Supplement) | AIS |
| SUPPS | Regional Supplementary Procedures | AIS |
| SVCBL | Serviceable | AIS |
| SVY | Survey Operations | AIS |
| SW | South-West | AIS |
| SWS | Soft Wet Surface | AIS |
| SWY | Stopway | AIS |
| …T | Bearing (true) | AIS |
| T | Temperature | AIS |
| TA | Transition Altitude | AIS |
| TA | Traffic advisory | ICAO/AIP |
| TAAATS | The Australian Advanced Air Traffic System | |
| TAAM | Airservices Australia’s Total Airspace Airport and Aerodrome Modeller | AIS |
| TAC | Terminal Area Chart | AIS |
| TACAN | Tactical Air Navigation Aid | AIS |
| TAF | Aerodrome Forecast | AIS |
| TAFE | Technical and Further Education | Part 66/147 |
| TAIL | Tailwind | AIS |
| TAR | Terminal Area Surveillance Area | AIS |
| TAS | True Airspeed | AIS |
| TAT | Terminal Area Thunderstorm Service (meteorological term) | AIS |
| TAWS | Terrain awareness and warning system | CAO 20.18 |
| TAX | Taxiing, Taxi | AIS |
| TBA | To be advised | AIS |
| TBO | Time Between Overhauls | WATOG |
| TC | Type Certificate | Part 21 |
| TC | Tropical Cyclone | AIS |
| TC5 | Technical Committee 5 – AME Licensing Committee established under RFP | CASA |
| TCAS | Traffic alert and collision avoidance system | ICAO |
| TCDS | Type certificate data sheet | Part 21 |
| TCH | Threshold Crossing Height | AIS |
| TCTA | Trans-continental Control Area | AIS |
| TCU | Towering Cumulus (met) | AIS |
| TDO | Tornado | AIS |
| TDZ | Touchdown Zone | AIS |
| TECR | Technical Reason | AIS |
| TEL | Telephone | AIS |
| TEM | (Illustrated) Tool And Equipment Manual | WATOG |
| TEMPO | Temporary, Temporarily | AIS |
| TERPs | Terminal and En-route procedures | AIS |
| TFC | Traffic | AIS |
| TFR | Terrain Following Radar (by the MIL) | AIS |
| TGL | Touch & Go Landing | AIS |
| TGS | Taxiing Guidance System | AIS |
| THR | Threshold | AIS |
| THRU | Through | AIS |
| THU | Thursday | AIS |
| TIBA | Traffic Information Broadcasts by Aircraft | AIS |
| TIL | Until | AIS |
| TIP | Until Past (place) | AIS |
| TIS | Time in service | |
| TKOF | Take-off | AIS |
| TLOF | Touchdown and lift-off area | ICAO |
| TLS | Transponder Landing System | |
| TLW | Time Limited WIP (work in progress) | AIS |
| TMA | Terminal Control Area | AIS |
| TNA | Turn Altitude | AIS |
| TNH | Turn Height | AIS |
| TNS | Transitional Surface | AIS |
| TOC | Top of Climb | AIS |
| TODA | Take-off distance available | ICAO |
| TOP | Cloud Top | AIS |
| TORA | Take-off run available | ICAO |
| TP | Turning Point | AIS |
| TR | Track | AIS |
| TRA | Temporary Reserved Airspace | AIS |
| TRAN | Transition | AIS |
| TRANS | Transmits, Transmitter | AIS |
| TRL | Transition Level | AIS |
| TROP | Tropopause | AIS |
| TS… | Thunderstorm (followed by RA=rain, SN=snow, PE=ice pellets, GR=hail, GS=small hail and/or snow thunderstorm with rain and snow pellets or combinations thereof, eg TSRASN = thunderstorm with rain and snow) | AIS |
| TSI | Time Since Installation | WATOG |
| TSO | Time Since Overhaul | WATOG |
| TTF | Trend Type Forecast | AIS |
| TTMRA | Trans Tasman Mutual Recognition Agreement | |
| TUE | Tuesday | AIS |
| TURB | Turbulence | AIS |
| T-VASIS | T’ Visual Approach Slope Indicator System (pronounced ‘TEE-VAR-SIS’) | AIS |
| TWR | Aerodrome Control Tower, Aerodrome Control | AIS |
| TWY | Taxiway | AIS |
| TWYL | Taxiway Link | AIS |
| TYP | Type of Aircraft | AIS |
| TYPH | Typhoon | AIS |
| UAB | Until Advised By | AIS |
| UAV | Unmanned aerial vehicles | Part 101 |
| UDF | UHF Direction Finding Stations | AIS |
| UFN | Until Further Notice | AIS |
| UHDT | Unable Higher Due Traffic | AIS |
| UHF | Ultra High Frequency (300 to 3,000 MHZ) | AIS |
| UIR | Upper Flight Information Region | AIS |
| UK | United Kingdom | AIS |
| UL | Upper Limits | AIS |
| UNA | Unable | AIS |
| UNAP | Unable to Approve | AIS |
| UNICOM | Universal Communications | |
| UNLC | Unlicensed | AIS |
| UNL | Unlimited | AIS |
| UNREL | Unreliable | AIS |
| U/S | Unserviceable | AIS |
| US | United States | AIS |
| USA | United States of America | AIS |
| UTA | Upper Control Area | AIS |
| UTC | Coordinated Universal Time | AIS |
| VA | Volcanic Ash | AIS |
| VAC | Visual Approach Chart ( followed by name/title) | AIS |
| VAL | In Valleys | AIS |
| VAR | Magnetic Variation | AIS |
| VASIS | Visual Approach Slope Indicator System | AIS |
| VCY | Vicinity | AIS |
| VC | Vicinity of the aerodrome (followed by FG=fog,FC=funnel cloud, PO=dust/sand whirls, BLDU=blowing dust, BLSA=blowing sand or BLSN=blowing snow; eg, VCFG=vicinity fog) | AIS |
| VDF | VHF Direction Finding Station | AIS |
| VEC | Visual En-route Chart | AIS |
| VER | Vertical | AIS |
| VFR | Visual flight rules | |
| VHF | Very High Frequency (30 to 300 MHZ) | AIS |
| VIA | By way of… | AIS |
| VIP | Very Important Person | AIS |
| VIS | Visibility | AIS |
| VLF | Very Low Frequency (3 to 30 KHZ) | AIS |
| VLR | Very Long Range | AIS |
| VMC | Visual Meteorological Conditions | AIS |
| VNE | Never Exceed Speed | ICAO |
| VNO | Maximum Structural Cruising Speed | ICAO |
| VOLMET | Meteorological Information for Aircraft in Flight | AIS |
| VOR | VHF Omni-directional Radio Range (OMNI) | AIS |
| VSL | Vertical speed limit | ICAO |
| VSO | Stalling speed, minimum steady flight speed in the landing configuration | CAR 1998 |
| VRB | Variable | AIS |
| VTC | Visual Terminal Chart | AIS |
| VTOL | Vertical take-off and landing | ICAO |
| W | West, West Longitude | AIS |
| W | White | AIS |
| WAC | World Aeronautical Chart � ICAO 1:1,000,000 (followed by name/title) | AIS |
| WAFC | World Area Forecast Centre | AIS |
| WATIR | Weather and Terminal Information Rectifier | AIS |
| WATOG | World Airlines Technical Operations Glossary | |
| WB | Westbound | AIS |
| WBM | Weight And Balance Manual | WATOG |
| WDI | Wind Direction Indicator | AIS |
| WDSPR | Widespread | AIS |
| WED | Wednesday | AIS |
| WEF | With Effect From, Effective From | AIS |
| WGS-84 | World Geodetic System � 1984 | AIS |
| WI | Within | AIS |
| WID | Width | AIS |
| WIE | With Immediate Effect, Effective Immediately | AIS |
| WILCO | Will Comply | AIS |
| WIND | Wind (used in connection with direction and speed) WINTEM Forecast upper wind and temperature at specified points (in aeronautical met code) | AIS |
| WIP | Work in Progress | AIS |
| WKN | Weaken, Weakening | AIS |
| WM | Wiring Manual | WATOG |
| WNW | West North-West | AIS |
| WO | Without | AIS |
| WPT | Way-point | AIS |
| WRNG | Warning | AIS |
| WS | Wind Shear | AIS |
| WSW | West South-West | AIS |
| WT | Weight | AIS |
| WTSPT | Water Spout | AIS |
| WWW | World Wide Web | AIS |
| WX | Weather | AIS |
| X | Cross | AIS |
| XBAR | Crossbar (of approach lighting system) | AIS |
| XNG | Crossing | AIS |
| XS | Atmospherics | AIS |
| XSEC | Extra Section | WATOG |
| Y | Yellow | AIS |
| YCZ | Yellow Caution Zone | AIS |
| YR | Your/s | AIS |
| Z | Coordinated Universal Time (in meteorological messages) | AIS |
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