Aviation Acronym Definitions
These acronyms are used across the world for aviation purposes.
Acronym | Meaning | Source |
A | Amber | ICAO |
A/A | Air to air | AIS |
A/G | Air-to-ground | AIS |
A&P | Airframes and Powerplants | FAA |
AA | Airservices Australia | |
AAA | Amended meterological message | ICAO |
AAAA | Aerial Agricultural Association of Australia | |
AAC | Airworthiness Advisory Circular | CAR 1988 |
AACC | Area approach control centre | AIS |
AAD | Assigned altitude deviation | AIS |
AAIM | Aircraft Autonomous Integrity Monitor | |
AAIS | Automatic aerodrome information service | AIS |
AAL | Above aerodrome level | AIS |
AAR | Authorised Airworthiness Representative | CASR Part 183 |
AAT | Administrative Appeals Tribunal | |
ABAA | Amateur Built Aircraft Acceptance | CASR Part 21 |
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 1998 CASRs) | CASR 1998 |
AC | Altocumulus (met) | ICAO/AIP |
ACA | Australian Commonwealth Authority | |
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 followed by a country code) | JAA |
ACK | Acknowledge | AIS |
ACL | Altimeter check location | ICAO |
ACN | Aircraft classification number | ICAO |
ACN | Australian company number | |
ACPT | Accept, accepted | AIS |
ACROB | Acrobatics | |
Act | the Civil Aviation Act 1988 | |
ACT | Active, activated, activity | AIS |
AD | Aerodrome | ICAO/AIP |
AD | Airworthiness Directive | CASR Part 39 |
ADA | Advisory area | ICAO |
ADAO | Authorised Design Approval Organisation | CASR 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 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 |
AEB | CASA's Airworthiness Engineering Branch | CASA |
AEP | Aerodrome emergency plan | AIS |
AER | Authorised Engineering Representative | CASR Part 183 |
AERIS | Automatic en route information service | AIS |
AFAP | Australian Federation of Air Pilots | |
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 |
Ag | Agriculture | |
AGA | Again | ICAO |
AGD | Attorney-General's Department | |
AGE | Aircraft Ground Equipment | WATOG |
AGL | Above Ground Level | ICAO/AIP |
AH | After hours | AIS |
AH | Artificial Horizon | |
AIC | Aeronautical Information Circular | AIP |
AIDC | Air traffic services inter-facitility data communications | ICAO |
AIP | Aeronautical Information Publication | ICAO/AIP |
AIP ENR | Aeronautical Information Publication En-route | |
AIP ERSA | Aeronautical Information Publication En-route Supplement Australia | |
AIRAC | Aeronautical Information Regulation and Control | ICAO/AIP |
AIRC | Aeronautical Information and Control | ICAO |
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 |
ALA/HLS | Aircraft Landing Area/Helicopter Landing Site | |
ALAEA | Australian Licensed Aircraft Engineers Association | |
ALARP | As Low as Reasonably Practical | AIS |
ALERFA | Alert phase | AIS |
ALI | Airworthiness Limitation Item | |
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 |
AMC | Acceptable Means of Compliance | |
AMD | Amend, Amended | AIS |
AMDT | Amendment (AIP amendment) | ICAO/AIP |
AME | Aircraft Maintenance Engineer | CASR Part 66 |
AMM | Aircraft Maintenance Manual | WATOG |
AMO | Approved Maintenance Organisation | CASR Part 145 |
AMP | Aircraft Maintenance Program | CASR Part 145 |
AMPA | Authorised Maintenance Personnel Assessor | CASR Part 66 |
AMRD | Australian Maintenance Requirements Document | CASR Part 43 |
AMS | Aircraft Maintenance Specialist | CASR Part 145 |
AMSL | Above Mean Sea Level | AIS |
AMSS | Aeronautical mobile satellite service | ICAO |
AMT | Aircraft Maintenance Technician | CASR 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 |
ANO | Air Navigation Order (now CAO) | |
ANS | Answer | ICAO |
ANTA | Australian National Training Authority | CASR Part 66 |
ANVIS | Aviator Night Vision Imaging Systems | |
AO | Air Operator | |
AOC | Aerodrome Obstacle Chart (followed by name/title) | AIS/AIP |
AOC | Air Operators Certificate | CASR Part 119 |
AOCM | Air Operators Certification Manual | |
AOD | Alcohol and Other Drug | CASA |
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 | CASR 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 (sometimes referred to as RFFS) | CASR Part 139 |
ARFL | Aeroplane Reference Field Length | AIS |
ARFO | Area Forecast | |
ARG | Aviation Reform Group | |
ARH | Aircraft Registration Holder | CASR 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 |
ASEPTA | Approved Single-engine Turbine Aeroplane | |
ASF | Aviation Safety Forum | AIS |
ASH | Aviation Services Handbook | |
ASI | Air Speed Indicatort | |
ASI | Aviation Safety Index | |
ASIR | Aviation Safety Incident Report | |
ASPH | Asphalt | ICAO |
ASR | Area Surveillance Radar | AIS |
ASRA | Australian Sport Rotorcraft Association | |
ASSI | Air Safety Support International- a wholly-owned subsidiary of the UK Civil Aviation Authority | Air Safety Support International (UK) |
ASTM | American Society for Testing Materials | |
ASTRA | Australian Strategic Air Traffic Management Group | |
AT-VASIS | Abbreviated 'T' Visual Approach Slope Indicator System (pronounced 'AY-TEE-VASIS') | AIS |
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 | CASR 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 | |
ATO | Aviation Training Organisatio | |
ATOG | CASA's Air Transport Operations Group | CASA |
ATP | At.. (time or place) | ICAO |
ATPL | Airline Transport Pilot Licence | |
ATS | Air Traffic Service(s) | CASR Part 172 |
ATSB | Australian Transport Safety Bureau | |
ATSO | Australian Technical Standard Order | CASR Part 21 |
ATSOA | Australian Technical Standard Order Authorisation | CASR Part 21 |
ATTN | Attention | AIS |
ATZ | Aerodrome traffic zone | ICAO |
AUF | Australian Ultralight Federation (now Recreational Aviation Australia) | |
AUG | August | AIS |
AUTH | Authorised, Authorisation | AIS |
AUW | All Up Weight | AIS |
AUX | Auxiliary | AIS |
AVBL | Available | AIS |
AVG | Average | AIS |
AVGAS | Aviation Gasoline | AIS |
AVM | Abrupt Vertical Manoeuvres (by the MIL) | 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 |
BETA | Manually controlled mode for constant speed propellers or turbo prop aircraft | |
BFR | Before | AIS |
BIP-M | Basic Instruction Package for Meteorologists | |
BIPMT | Basic Instruction Package for Meteorological Technicians | |
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 | Course Acquisition | |
CA/GRO | Certified Air/Ground Radio Operator | CASR Part 139 |
CA/GRS | Certified Air/Ground Radio Service | CASR 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 | CASR Part 145 |
CAO | Civil Aviation Order | |
CAR | Civil Aviation Regulation (1988) [existing] | |
CAR | Civil Aviation Regulation (1998) [now known as 1998 CASR) | |
CAS | Calibrated air speed | ICAO |
CASA | Civil Aviation Safety Authority | |
CASR | Civil Aviation Safety Regulation | |
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 |
CBT | Competency-based Training | |
CC | Cirrocumulus (met) | AIS |
CCA | Corrected meteorological message (for CCB, CCC..etc in sequence) (message type designator) | ICAO |
CCF | Capability Check Flight | |
CCTS | Circuits | AIS |
CD | Candela | ICAO |
CDCCL | Critical Design Configuration Control Limit | |
CDI | Course Direction Indicator | |
CDL | Configuration Deviation List | CASR 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 |
CFIT | Controlled Flight into Terrain | |
CFL | Cleared Flight Level | AIS |
CFM | Confirm, I confirm | AIS |
CG | Centre of gravity | ICAO |
CGL | Circling guidance light(s) | ICAO |
CH | This is a channel continuity check of transmission to permit comparision 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 |
CIR | Command Instrument Rating | CAR 1988 |
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 |
CLMAX | Maximum Co-efficient of Lift | |
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 | Configuration, Maintenance and Procedures | |
CMPL | Completion, Completed, or Complete | AIS |
CMR | Certification Maintenance Requirements | |
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 Licence | CAR 1988 |
CPL | Current flight plan | ICAO |
CRC | Cyclic redundancy check | ICAO |
CRIS | Cost Recovery Impact Statement | Department of Finance |
CRM | Crew Resource Management | CASR Part 121 |
CRZ | Cruise | AIS |
CS | Cirrostratus (met) | AIS |
CS | Call sign | AIS |
CSDD | Common Support Data Dictionary published by the Air Transport Association of America (ATA). The CSDD replaces the WATOG. | |
CSU | Constant Speed Unit | |
CTA | Control Area | AIS |
CTAF | Common Traffic Advisory Frequency | CASR Part 172/AIP |
CTAF(R) | Common Traffic Advisory Frequency - (Radio) | AIS |
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 | Deleted | AIS |
D | Downward (tendency in RVR (Runway visual range) during previous 10 minutes) | ICAO |
D-ATIS | Data Link Automatic Terminal Information Service (pronounced'DEE-ATIS') | AIS |
D-VOLMET | Data Link VOLMET | AIS |
D... | Danger Area (followed by identification) | AIS |
DA | Decision Altitude | AIS |
DA/H | Decision Altitude/Height | AIP |
DALR | Dry Adiabatic Lapse Rate | |
DAME | Designated Aviation Medical Examiner | CASR Part 67 |
DAO | Designated Aviation Ophthamologist | CASR Part 67 |
DAP | Departure and Approach Procedures | AIP |
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 |
DGA | Distance Measuring Equipment or Global Positioning Satellite System Arrival | |
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 Microwave Landing System) | AIS |
DNG | Danger, Dangerous | AIS |
DOC | Direct Operating Cost | WATOG |
DOC | Documents | AIS |
DoD | Department of Defence | |
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 |
DUC | Dense Upper Cloud (met) | AIS |
DUPE | This is a duplicate message (to be used in Aeronautical Fixed Service as a procedure signal) | ICAO |
DUR | Duration | AIS |
DVOR | Doppler VOR | AIS |
DW | Dual wheels | ICAO |
DZ | Drizzle | AIS |
E | East, East Longitude | AIS |
E E E | Error (to be used in AFS as a procedure signal) | ICAO |
EASA | European Aviaton Safety Agency | |
EAT | Expected Approach Time | AIS |
EB | Eastbound | AIS |
ECAR | European Civil Aviation Requirement (formerly JAR) | |
EDTO | Extended Diversion Time Operations | |
EET | Estimated Elapsed Time | AIS |
EFB | Electronic Flight Bag | |
EFC | Expect further clearance | ICAO |
EGNOS | European Geostationary Navigation Overlay System | |
EGPWS | Enhanced Ground Proximity Warning System | CAR 1988 |
EHF | Extremely high frequency (30,000 to 300,000 MHz) | ICAO/AIP |
EHR | Encumbrance Holder Register | CASR 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 | |
EMS | Environment Management System | |
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 |
ERP | Emergency Response Plan | |
ERSA | En-route 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 |
ETP | Equi Time Interval | |
ETT | Estimated Time Interval | |
EV | Every | AIS |
EVU | Enforceable Voluntary Undertaking | Section 30DK of the Civil Aviation Act 1988 |
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 | CASR Part 129 |
FAC | Facility, Facilities | AIS |
FADEC | Full Authority Digital Engine Control | |
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 coefficient | ICAO |
FD | Fault Detection | |
FDE | Fault detection and exclusion (in relation to GPS equipment) | |
FDL | Fixed Distance Lighting | AIS |
FDPS | Flight Data Processing system | AIS |
FDS | Flight Director System | |
FEB | February | AIS |
FEW | Few (cloud descriptor) | 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 |
FLIR | Forward Looking Infra Red | |
FLR | Flares | AIS |
FLT | Flight | ICAO/WATOG/AIP |
FLTCK | Flight check | ICAO/AIP |
FLUC | Fluctuating, Fluctuation, Fluctuated | 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 | Flight Management System | AIS |
FMS | Fatigue management system | CAR 1998 |
FMS | Flight management system | ICAO |
FMU | Flow Management Unit | AIS |
FNA | Final Approach | AIS |
FNPT | Flight and Navigation Procedures Trainer | ICAO |
FOD | Foreign Object Damage | WATOG |
FOI | Flying Operations Inspector | |
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 |
FRMS | Fatigue Risk Management System | |
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 | CASR Part 60 |
FTE | Full time equivalent | |
FTO | Flight Training Organisation | |
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 | Gravity | |
G | Green | AIS |
G-G | Governor-General | |
G/A | Ground-to-air | ICAO |
G/A/G | Ground-to-air and air-to-ground | ICAO |
GA | Go ahead, resume sending (to be used in AFS as a procedure signal) | ICAO |
GA | General Aviation | CAR 1988 |
GAAP | General Aviation Aerodrome Procedures | AIS |
GAMET | Area forecast for low-level flights | ICAO |
GAOG | CASA's General Aviation Operations Group | CASA |
GAPAN | Guild of Air Pilots and Navigators | |
GBAS | Ground Based Augmentation System | |
GCA | Ground Controlled Approach | AIS |
GCN | General Computing Network (operated by Airservices Australia) | AIS |
GDOP | Geometric Dilution of Precision | |
GEN | General | AIS |
GEO | Geographic, true | AIS |
GES | Ground Earth Station | AIS |
GFA | The Gliding Federation of Australia | |
GFY | Glider Flying | AIS |
GHA | Ground handling agents | |
GIVD | Gravity Induced Vestibular Dysfunction | |
GLD | Glider | AIS |
GLOC | Gravity Induced Loss of Consciousness | |
GLONASS | Global Orbiting Navigation Satellite System (pronounced 'GLO-NAS') | AIS |
GM | Guidance Material | |
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 (see GNSS) | |
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 grid point 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 | |
HAAMC | Head of Aircraft Airworthiness and Maintenance Control | Aviation Law in Australia, 2004 edition |
HAM | Head of Aircraft Maintenance | CASR Part 145 |
HAMC | Head of Aircraft Maintenance Control | CASR 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 |
HFEM | Human Factor and Error Management System | |
HGFA | Hang Gliding Federation of Australia Inc | |
HGS | Heads-up Guidance System | |
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 |
HMI | Human-machine Interface | |
HN | Sunset to Sunrise | AIS |
HO | Service available to meet operational requirements | AIS |
HOFO | Head of Flying Operations | |
HOL | Holiday | |
HOSP | Hospital Aircraft | AIS |
HOTAS | Head of Training and Standards | |
HOTC | Head of Training and Checking | |
HP | Horse Power | |
HPA | HectoPascal | AIS |
HR | Hours | AIS |
HS | Homestead | AIS |
HS | Service available during hours of scheduled operations | AIS |
HSL | Hold Short Lights | AIS |
HUD | Heads Up Display | |
HURCN | Hurricane | AIS |
HVDF | High and very high frequency direction finding stations (at the same location) | 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 |
IAP | Instrument Approach Plate | |
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 |
ICUS | In-command Under Supervision | |
ID | Identifier, identify | AIS |
IDENT | Identification | AIS |
IF | Instrument Flight | |
IF | Intermediate Approach Fix | AIS |
IFF | Identification Friend/Foe | AIS |
IFR | Instrument flight rules | ICAO/AIP |
IFSD | In-flight Shutdown | |
IG | Implementation Group | |
IGA | International general aviation | /AIPICAO |
ILS | Instrument Landing System | AIS |
IM | Inner Marker | AIS |
IMC | Instrument meteorological conditions (other than VMC) | CAR 1988 |
IMC | Indirect Maintenance Cost | WATOG |
IMG | Immigration | AIS |
IMI | Interrogation sign | ICAO |
IMPR | Improve, Improving, Improvement | AIS |
IMT | Immediate, Immediately | AIS |
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 (meteorological) | 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 |
IOE | Initial Operational Experience | |
IPC | Illustrated Parts Catalogue | WATOG |
IR | Ice on runway | ICAO |
IREX | Instrument Training Examination | |
IRM | Immediately Reportable Matters | |
IRS | Internal Reporting System | |
ISA | International Standard Atmosphere | AIS |
ISB | Independent Sideband | AIS |
ISG | CASA's Information Services Group | CASA |
ISIM | Integrated Safety Investigation Methodology | |
ISO9000 | International Organization for Standardization | |
ISOL | Isolated | AIS |
ITT | Interstage Turbine Temperature | |
IWI | Illuminated Wind Indicator | AIS |
IWP | Intermediate Way-point | AIS |
J-BAR | Jet Barrier | AIS |
JAA | Joint Aviation Authorities (of Europe) | |
JAN | January | AIS |
JAR | Joint Aviation Requirements (of the European JAA) | |
JAR-OPS | JAR Operations | |
JF | Saturday, Sunday and PH | AIS |
JO | Monday to Friday except PH | AIS |
JTSO | Joint Technical Standard Order | |
JTST | Jet Stream | AIS |
JUL | July | AIS |
JUN | June | AIS |
KDR | Knowledge Deficiency Report | |
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 |
LAAS | Local Area Augmentation System | |
LAHSO | Land and Hold Short Operations | AIS |
LAME | Licensed Aircraft Maintenance Engineer | CASR 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 |
LL | Lower Limit | AIS |
LLN | Low-level Navigation (by the MIL) | AIS |
LLO | Low Level Operations (by the MIL) | 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 |
LOSA | Line Operations Safety Audit | |
LPT | Liquid Penetrant Test | |
LRCS | Long-range communication system | FAR |
LRG | Long Range | AIS |
LRI | Line Replaceable Item | WATOG |
LRNS | Long-range navigation system | FAR |
LRU | Line Replaceable Unit | WATOG |
LSA | Light Sport Aircraft | |
LSALT | Lowest safe altitude | |
LSG | CASA's Legal Services Group | CASA |
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 | Mach number (followed by figures ie .02 = Mach .02) | AIS |
M (m) | Metres (preceded by figures) | AIS |
M/E | Multi-engine | |
MAAT | Manual Authoring and Assessment Tool | |
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 |
MAP | Manifold Air Pressure | |
MAPT | Missed Approach Point | ICAO/AIP |
MAR | At Sea | AIS |
MAR | March | AIS |
MAUW | Maximum All Up Weight | |
MAWP | Missed Approach Waypoint | AIS |
MAX | Maximum | AIS |
MBST | Microburst | AIS |
MBZ | Mandatory Broadcast Zone | AIP |
MCANTO | CASA's Manufacturing, Certification and New Technologies Office (Now Airworthiness Engineering Branch) | CASA |
MCC | Multi-crew Co-ordination | |
MCM | Maintenance control manual | CASR Part 145 |
MCQFS | Manual of criteria for the qualification of flight simulators ICAO Doc 9625-AN/938 | CASR 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 | CASR Part 66 |
MET | Meteorological, Meteorology | AIS |
MET | REPORT Aviation routine weather report | AIS |
METAR | Aviation routine weather report (in aeronautical meteorological code) | AIS |
METRAD | MET Radar | AIS |
MF | Medium Frequency (300 to 3000 KHZ) | AIS |
MHZ (mhz) | Megahertz | AIS |
MIFG | Shallow Fog | AIS |
MIL | Military | AIS |
MIL-STD | Military Standard | |
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 | AIS |
MOD | Moderate (used to indicate the intensity of WX phenomena, interference or static reports, eg MOD RA = moderate rain). | AIS |
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 |
MPD | Maintenance Planning Data | ATA/FAR |
MPI | Magnetic Particle Inspection | |
MPL | Multi-crew Pilot Licence (MPL) | ICAO Annex 1 'Personnel Licensing' |
MPS | Metres per Second | AIS |
MPT | Magnetic Particle Inspection Technician | |
MRB | Maintenance Review Board | ATA/FAR |
MRBR | Maintenance Review Board Report | |
MRG | Medium Range | AIS |
MRO | Maintenance, repair and overhaul | CASR Part 145 |
MRP | ATS/MET Reporting Point | AIS |
MS | Minus | AIS |
MSA | Minimum sector altitude | AIP |
MSAS | Multi-function Transport Satellite (MTSAT) Satellite-based Augmentation System | |
MSDS | Material Safety Data Sheets | |
MSG | Message | AIS |
MSG | Maintenance Steering Group | ATA/FAR |
MSG-3 | Maintenance Steering Group Logic Process | |
MSI | Maintenance Significant Item | WATOG |
MSL | Mean Sea Level | AIS |
MSOS | Maintenance specific operation specification | CASR Part 145 |
MSSR | Monopulse Secondary Surveillance Radar | AIS |
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 | CASR Part 147 |
MTOW | Maximum take-off weight | AIP |
MTP | Maximum Tyre Pressure | AIS |
MTSAT | Multi-function Transport Satellite | |
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 |
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 |
N1 | Gas Generator Speed | |
N2 | Second Stage Turbine Speed | |
NAA | National Airworthiness Authority (for a country other than Australia) | CAR 1998 |
NAD | Non-acqueous Developer | |
NAIPS | National aeronautical information processing system | AIP |
NANDTB | National Aerospace Non-destructive Testing Board | |
NANU | Notice Advisory to NavStar Users | |
NAP | Noise Abatement Procedures | AIS |
NAS | National Airspace System | |
NASC | National AIS System Centre | AIS |
NASIG | National Airspace System Implementation Group | |
NAT | NAVAID Training | AIS |
NAV | Navigation | AIS |
NAVAID | Navigation Aid | AIS |
NAWD | Non-acqueous Wet Developer | |
NB | Northbound | AIS |
NBFR | Not Before | AIS |
NC | No Change | AIS |
NDB | Non-directional Radio Beacon | AIS |
NDI | Non-destructive inspection | CAR 1988 |
NDT | Non-destructive testing | CAR 1988 |
NE | Northeast | AIS |
NEG | Negative, No. Permission not granted or, That is not correct | AIS |
NFRM | Notice of Final Rule Making | CASA |
NG | Gas Generator Speed | |
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 |
NOV | November | AIS |
NOZ | Normal Operating Zone | AIS |
NP | Propeller Speed | |
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 |
NTS | Negative Torque Sensing System | |
NTSB | National Transportation Safety Board (of the USA) | |
NTZ | No-transgression zone | AIP/ICAO |
NVD | Night Vision Device | |
NVED | Night Vision Enhancement Devices | |
NVET | National vocational education and training | CASR Part 66 |
NVFR | Night Visual Flight Rules | |
NVG | Night Vision Goggles (by the MIL) | AIS |
NVIS | Night Vision Imaging Systems | |
NW | North-West | AIS |
NXT | Next | AIS |
NZ | New Zealand | |
NZ CAA | New Zealand Civil Aviation Authority | |
NZS | New Zealand Standard | |
O/R | On Request | |
OAR | Office of Airspace Regulation | CASA |
OAT | Outside Air Transport | |
OAT | Outside Air Temperature | |
OBPR | Office of Best Practice Regulation | |
OBS | Observe, Observed, Observation | |
OBS | Omni Bearing Selector | |
OBSC | Obscure, Obscured, Obscuring | |
OBST | Obstacle | |
OBSTR | Obstruction | |
OC | Operating Certificate | |
OCA | Obstacle Clearing Altitude | |
OCA | Oceanic Control Area | |
OCC | Occulting (light) | |
OCH | Obstacle Clearance Height | |
OCNL | Occasional, Occasionally | |
OCT | October | |
OCTA | Outside Control Area | AIS |
OCTR | Outside Control Zone | |
OEI | One Engine Inoperative | |
OEM | Original Equipment Manufacturer | |
OFZ | Obstacle Free Zone | |
OHD | Overhead | |
OHSMS | Occupational Health and Safety Management Systems | |
OIS | Obstacle Identification Surface | |
OLC | Office of Legal Counsel | |
OLD | Office of Legislative Drafting (replaced by OLDP) at the Attorney-General's Department | |
OLDI | On-line Data Interchange | |
OLDP | Office of Legislative Drafting and Publishing (previously OLD) at the Attorney-General's Department | |
OLS | Obstacle Limitation Surface | |
OM | Operations Manual | |
OM | Outer Marker | |
OPA | Opaque, white type of ice formation | |
OPC | Office of Parliamentary Counsel | |
OPMET | Operational Meteorological | |
OPN | Operational Notification Message (message type designator) | |
OPN | Open, Opening, Opened | |
OPR | Operator, Operate, Operative, Operating, Operational | |
OPS | Operations | |
ORR | Office of Regulation Review (at the Productivity Commission) | |
ORS | Online Response System - a CASA online form for consultation documents such as DPs, NPRMs, NPCs, draft ACs and draft CAAPs | CASA |
OSIP | Overhaul and Special Inspections Periods | |
OT | Other Times | |
OTAC | Overseas Territories Aviation Circulars - developed by ASSI, a wholly-owned subsidiary of the UK Civil Aviation Authority. ASSI oversees aviation safety in the UK's overseas territories. | Air Safety Support International (UK) |
OTAR | Overseas Territories Aviation Requirements - developed by ASSI, a wholly-owned subsidiary of the UK Civil Aviation Authority. ASSI oversees aviation safety in the UK's overseas territories. | Air Safety Support International (UK) |
OTLK | Outlook (used in Sigmet messages for volcanic ash and tropical cyclones) | |
OTP | On Top | |
OUBD | Outboard | |
OVC | Overcast | |
OW | Over Water | |
P.. | Prohibited Area (followed by identification) | AIS |
PA | Precision Approach | |
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 |
PC | Personal Computer | |
PCATD | Personal Computer-based Aviation Training Device | |
PCD | Proceed, Proceeding | AIS |
PCL | Pilot Controlled Lighting | AIS |
PCN | Pavement classification number | ICAO/AIP |
PCT | Practical consolidation training | CASR Part 66 |
PDC | Pre-Departure Clearance | AIS |
PDO | Product distribution organisation | CASR Part 144 |
PDOP | Positional Dilution of Precision | |
PDSE | Pre-departure Service Check | |
PEC | Pressure Error Correction | AIS |
PERM | Permanent | AIS |
PFC | Porous Friction Course | AIS |
PFR | Preferred Route | AIS |
PH | Public Holiday | AIS |
PIB | Pre-flight information bulletin | ICAO/AIP |
PIC | Pilot-in-command | CAR 1988 |
PICUS | Pilot-in-Command Under Supervision | |
PIFR | Private IFR rating | CAR 1988 |
PILS | Practice ILS | AIS |
PIREP | Pilot Reports | WATOG |
PJE | Parachute Jumping Exercise | AIS |
PL | Ice Pellets | AIS |
PLET | CASA's Personnel Licensing, Education and Training Group | CASA |
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 |
POH | Pilot Operating Handbook | |
POSS | Possible | AIS |
PPI | Plan Position Indicator | AIS |
PPL | Private Pilot Licence | CAR 1988 |
PPR | Prior Permission Required | AIS |
PPS | Precise Positioning Service | |
PPSN | Present Position | AIS |
PRD | Prohibited, Restricted and Danger Areas | AIS |
PRFG | Aerodrome Partially Covered by Fog (MET code) | AIS |
PRI | Primary | AIS |
PRKG | Parking | AIS |
PRM | Precision Runway Monitoring | 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 |
PTT | Push To Talk | |
PVT | Private | AIS |
PWR | Power | AIS |
QDM | Magnetic Heading (zero wind) | AIP |
QDR | Magnetic Bearing | AIP |
QEC | Quick Engine Change Unit | WATOG |
QFE | An altimeter set to QFE will read zero when the aircraft is on the runway | |
QMS | Quality Management System | |
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 | Right (runway system identification) | AIS |
R.... | Restricted Area (followed by number) | AIS |
R/T | Radio Telephone | |
RA | Rain | AIS |
RA-Aus | Recreational Aviation Australia (previously the AUF) | |
RAA | Recreational Aviation Australia (previously the AUF) | |
RAAO | Recreational Aviation Administrative Organisation | |
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 |
RAI | Runway Alignment Indicator | AIS |
RAIM | Receiver Autonomous Integrity Monitoring | AIS |
RAM | Repair and Maintenance | |
RAP | Regulatory Advisory Panel | |
RAPAC | Regional Airspace Users Advisory Committee | |
RAPIC | Radar Picture (MET) | AIS |
RAS | Radar Advisory Service | AIS |
RASC | Regional AIS System Centre | AIS |
RAT | RAM Air Turbine | |
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 |
RDCP | CASA's Regulatory Development Coordination Panel | CASA |
RDL | Radial | AIS |
RDMB | CASA's Regulatory Development Management Branch | CASA |
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 |
RFACA | Royal Federation of Aero Clubs of Australia | |
RFC | Request for change | |
RFC | Regional Forecasting Centre (Met) | AIS |
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 |
RIFTO | Restricted Instrument Flight Take-off | |
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 |
RMK | Root Mean Square | |
RNAV | Area navigation | AIP |
RNP | Required navigation performance | |
RO | Registered operator | CASR 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 | CASR Part 66 |
RPM | Revolutions Per Minute | |
RPT | Regular public transport | CAR 1988 |
RQ | Require(d) | AIS |
RQMNTS | Requirements | AIS |
RR | Report Reaching | AIS |
RRM | Routine Reportable Matters | |
RRP | Regulatory Reform Programme (now closed) | CASA |
RRPI | Regulatory Reform Programme Implementation (now closed) | 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 |
RTB | Return to Base | |
RTCA | Radio Technical Commission for Aeronautics | |
RTE | Route | AIS |
RTF | Radio Telephone | AIS |
RTHL | Runway Threshold Light(s) | AIS |
RTIL | Runway Threshold Identification Lights | AIS |
RTN | Return, Returned, Returning | AIS |
RTO | Rejected take-off | AIP |
RTO | Registered training organisation | CASR Part 147 |
RTS | Return to Service | AIS |
RTZL | Runway Touchdown Zone Light(s) | AIS |
RVR | Runway visual range | AIP/ICAO |
RVSM | Reduced Vertical Separation Minimum | ICAO/CAR 1988 |
RWS | Runway Strip | AIS |
RWY | Runway | AIS |
S | South, South Latitude | AIS |
S-I | Straight-In | AIP |
S/B | Service Bulletin | WATOG |
S/E | Single-engine | |
SA | Sand | AIS |
SA | Selective Availability | |
SA | Situation Awareness | |
SAAA | Sport Aircraft Association of Australia | |
SAG | ||
SAL | Supplementary Airline Licence | AIS |
SALR | Saturated Adiabatic Lapse Rate | |
SALS | Simple Approach Lighting System | AIS |
SAR | Search and Rescue | AIS |
SARPs | Standards and Recommended Practices (ICAO) | ICAO |
SARTIME | Time search action required | AIS |
SARWATCH | Search and Rescue Watch | |
SAT | Saturday | AIS |
SATCOM | Satellite Communication | AIS |
SB | Southbound | AIS |
SBAS | Satellite Based Augmentation System | |
SC | Stratocumulus | AIS |
SCC | Standards Consultative Council | CASA |
SCP | Safety Critical Personnel | |
SCT | Scattered (meteorological) | 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=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, eg, SHRASN = showers of rain and snow) | AIS |
SHF | Super High Frequency (3,000 to 30,000 MHZ) | AIS |
SHP | Shaft Horse Power | |
SID | Standard instrument departure | ICAO/AIP |
SIF | Selective Identification | AIS |
SIG | Significant | AIS |
SIGMET | Information concerning en route weather phenomena which may affect the safety of aircraft operations | AIS |
SIL | Service Information Letter | |
SIMUL | Simultaneous, or Simultaneously | AIS |
SKC | Sky Clear | AIS |
SKED | Schedule, Scheduled | AIS |
SL | Service Letter | |
SLP | Speed Limiting Point | AIS |
SLW | Slow, Slowly | AIS |
SM | Safety Manager | |
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 |
SOPS | Standard Operating Procedures | |
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 |
SPS | Standard Positioning Service | |
SQ | Squall | AIS |
SR | Sunrise | AIS |
SRB | Safety Review Board | |
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 |
SSCRO | Senate Standing Committee on Regulations and Ordinances | |
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 | CASR Part 21 |
STD | Synthetic training device | CASR 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 | Temperature | AIS |
T-VASIS | 'T'Visual Approach Slope Indicator System (pronounced 'TEE-VAR-SIS') | 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 |
TAF | Terminal Area Forcast | |
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 |
TAWS-B+ system | A terrain awareness and warning system that is equipped with a visual display and complies with the requirements for Class B equipment expressed in TSO-C151, TSO-C151a or TSO-C151b. | CAO Part 20, Section 20.18, Issue 9 |
TAX | Taxiing, Taxi | AIS |
TBA | To be advised | AIS |
TBO | Time Between Overhauls | WATOG |
TC | Type Certificate | CASR Part 21 |
TC | Tropical Cyclone | AIS |
TC5 | Technical Committee 5 - AME Licensing Committee established under RFP | CASA |
TCAC | Tropical Cyclone Advisory Centre | |
TCAS | Traffic alert and collision avoidance system | ICAO |
TCDS | Type certificate data sheet | CASR Part 21 |
TCH | Threshold Crossing Height | AIS |
TCO | Training and Checking Organisation | |
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 |
TEM | Threat and Error Management | |
TEMPO | Temporary, Temporarily (meteorologically) | 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 |
TMG | Track Made Good | |
TNA | Training Needs Analysis | |
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 |
TOT | Turbine Outlet Temperature | |
TP | Turning Point | AIS |
TR | Track | AIS |
TRA | Temporary Reserved Airspace | AIS |
TRAN | Transition | AIS |
TRANS | Transmits, Transmitter | AIS |
Trike | A manned, powered hang-glider | |
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 pellets or combinations thereof, eg TSRASN = thunderstorm with rain and snow) | AIS |
TSI | Time Since Installation | WATOG |
TSO | Technical Standard Order | |
TSO | Time Since Overhaul | WATOG |
TTF | Trend Type Forecast | AIS |
TTMRA | Trans Tasman Mutual Recognition Agreement | |
TUE | Tuesday | AIS |
TURB | Turbulence | AIS |
TWR | Aerodrome Control Tower, Aerodrome Control | AIS |
TWY | Taxiway | AIS |
TWYL | Taxiway Link | AIS |
TYP | Type of Aircraft | AIS |
TYPH | Typhoon | AIS |
U/S | Unserviceable | AIS |
UAB | Until Advised By | AIS |
UAV | Unmanned aerial vehicles | CASR Part 101 |
UDF | UHF Direction Finding Stations | AIS |
UFIT | Uncontrolled Flight Into Terrain | |
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 | |
UL | Upper Limits | AIS |
UNA | Unable | AIS |
UNAP | Unable to Approve | AIS |
UNICOM | Universal Communications | |
UNL | Unlimited | AIS |
UNLC | Unlicensed | AIS |
UNREL | Unreliable | AIS |
US | United States | |
US FAR | Federal Aviation Regulations (of the USA) | |
USA | United States of America | |
UTA | Upper Control Area | AIS |
UTC | Coordinated Universal Time | AIS |
V | Velocity | |
V1 | Take-off Decision Speed | |
V2 | Take-off Safety Speed (Applicable to Larger Multi-engine Aircraft) | |
VA | Volcanic Ash | AIS |
VA | Maximum Manoeuvring Speed | |
VAA-H | Visual Approach Area - Helicopter | |
VAAC | Volcanic Ash Advisory Centre | |
VAC | Visual Approach Chart ( followed by name/title) | AIS |
VAL | In Valleys | AIS |
VAR | Magnetic Variation | AIS |
VASIS | Visual Approach Slope Indicator System | 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 |
VCY | Vicinity | AIS |
VDF | VHF Direction Finding Station | AIS |
VEC | Visual En-route Chart | AIS |
VER | Vertical | AIS |
VFE | Flap Extension Speed | |
VFR | Visual flight rules | |
VHF | Very High Frequency (30 to 300 MHZ) | AIS |
VHFCOM | Very High Frequency Communications | |
VIA | By way of... | AIS |
VIMD | Maximum Drag Speed | |
VIP | Very Important Person | AIS |
VIS | Visibility | AIS |
VLE | Maximum Speed with Landing Gear Extended | |
VLF | Very Low Frequency (3 to 30 KHZ) | AIS |
VLJ | Veryl Light Jet | |
VLO | Landing Gear Operating | |
VLO2 | Landing Gear Operation Down | |
VLR | Very Long Range | AIS |
VMAN | Visual Maneouvre Speed | |
VMC | Visual Meteorological Conditions | AIS |
VMC | Minimum Control Speed | |
VMCA | Minimum Control Airspeed Airborne (Red line speed) | |
VMCG | Minimum Control Airspeed on the Ground | |
VNAV | Vertical Navigation | |
VNE | Never Exceed Speed | ICAO |
VNO | Maximum Structural Cruising Speed | ICAO |
VNO | Normal Operating Speed | |
VOLMET | Meteorological Information for Aircraft in Flight | AIS |
VOR | VHF Omni-directional Radio Range (OMNI) | AIS |
VP | Variable Pitch Propellers | |
VR | The speed at which the aircraft is rotated to lift off from the runway | |
VRB | Variable | AIS |
VSI | Vertical Speed Indicator | |
VSI | Clean Stall Speed | |
VSL | Vertical speed limit | ICAO |
VSO | Stalling speed, minimum steady flight speed in the landing configuration | CAR 1998 |
VSO | Stall speed with undercarriage and flap selected | |
VSSE | Safe single-engine Speed | |
VTC | Visual Terminal Chart | AIS |
VTOL | Vertical take-off and landing | ICAO |
VTOSS | Take-off Safely Speed | |
VX | Best Angle of Climb Speed | |
VXSE | Best Single-engine Angle of Climb Speed | |
Vy | Best Rate of Climb Speed | |
VYSE | Best Single-engine Rate of Climb Speed (Blue line speed) | |
W | Watt | |
W | West, West Longitude | AIS |
W | White | AIS |
W/V | Wind Velocity | |
WAAS | Wide Area Augmentation System | |
WAC | World Aeronautical Chart ICAO 1:1,000,000 (followed by name/title) | AIS |
WAFC | World Area Forecast Centre | AIS |
WAFS | World Area Forecast System | |
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 |
WMO | World Meteorological Organisation | |
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 |