ACMA – Australian Communications and Media Authority (managers of the RF spectrum) ADF – Automatic direction finding equipment ADS-B – Automatic dependent surveillance – broadcast AERIS – Automatic en route information service (continuous broadcast network) AFRU – Aerodrome frequency response unit A/G – Air-to-ground (communication) AIP – Airservices Australia Aeronautical Information Publication AIP GEN – The general part of the AIP book AIP ENR – The en route part of the AIP book AM – Amplitude modulation AMSA – Australian Maritime Safety Authority (reponsibilities include all search and rescue; see AusSAR) ATC – Air traffic control sector of ATS ATIS – Automatic terminal information system (continuous broadcast) ATS – Air Traffic Services AUF – Australian Ultralight Federation, now RA-Aus AusFIC – Airservices Australian Flight Information Centre [1800 814 931] AusSAR – AMSA's Australian Search and Rescue organisation AWIB – Automatic weather information broadcast AWIS – Automatic weather information system AWS – Automatic weather station CAA – Civil Aviation Act 1988 CA/GRS – Certified air/ground radio service CAO – Civil Aviation Order CAR – Civil Aviation Regulation CASA – Civil Aviation Safety Authority CASR – Civil Aviation Safety Regulation CAVOK – [cav-okay] Ceiling and visibility better than the minimum VMC conditions for VFR flight CB – The 40 UHF citizen's band channels between 476.425 and 477.400 MHz CENSAR – AusFIC Centralised SARTIME database software — see SARWATCH CL2006 – Current Radiocommunications (Aircraft and Aeronautical Mobile Stations) Class Licence COM or COMMS – The aviation VHF communications band: 118.00 to 136.975 MHz COSPAS – The Russian search and rescue satellite-aided tracking system CTA – Control area CTAF – [see-taff] Common traffic advisory frequency (in the vicinity of an airfield) CTR – Control zone ELB – Electronic locator beacon (obsolete system, not Cospas-Sarsat compatible) ELT – Emergency locator transmitter (aviation distress beacon) EPIRB – [e-perb] Emergency position-indicating radio (maritime distress) beacon ERC-L – En Route Chart–low ERSA – En Route Supplement–Australia ETA – Estimated time of arrival FIA – Flight information area FIR – Flight information region (BN and ML) FIS – Flight information service Flightwatch – Callsign of Airservices Australia's on-request flight information service FM – Frequency modulation GHz – Gigahertz – 1 GHZ = 1 billion cycles per second GNSS – Global navigation satellite system GPS – Global positioning system HF – The 12 aeronautical sub-bands, between 2850 and 22000 kHz, in the domestic and international high-frequency networks HGFA – The Hang Gliding Federation of Australia ICAO – International Civil Aviation Organisation ID – Identification (callsign) IFR – Instrument flight rules kHz – Kilohertz: 1 kHz = 1 thousand cycles per second LCD – Liquid crystal display LED – Light emitting diode LOS – Line of sight (distance) MAYDAY – Prefix to an R/T distress broadcast MTOW – [em-tow] Maximum take-off weight MEM – Memory (electronic) METAR – Routine aviation meteorological report MHz – Megahertz: 1 MHz = 1 million cycles per second Multicom – General airfield communications frequency: 126.7 MHz NAV – Aviation VHF navigation facilities band: 108.1 to 117.975 MHz NAV/COM – The inclusive aviation VHF band from 108.00 to 136.975 MHz NDB – Non-directional (radio) beacon OCTA – Outside controlled airspace PAN-PAN – Prefix to a radiotelephony urgency broadcast PCA – Planning Chart–Australia PEP – Peak envelope power PIC – Pilot in command PLB – Personal locator (distress) beacon POB – Persons on board PROG – Program (microprocessor) PTT – Press-to-talk (button or switch) QNH – The mean sea level pressure derived from the barometric pressure at the station location RA-Aus – Recreational Aviation Australia Inc RCC – AusSAR's Rescue Coordination Centre, Canberra RF – Radio frequency RIS – Radar information service (replaced by SIS) R/T – Radio telephony RPT – Regular public transport SAR – Search and rescue SARSAT – Search and rescue satellite-aided tracking system SARTIME – Time nominated by a pilot for the initiation of SAR action if a report has not been received by the nominated unit SARWATCH – Air Traffic Services SAR alerting system based on position reporting, scheduled reportings and other procedures for IFR flights but also includes VFR flights operating under ATS airways clearance or SIS SIS – ATS radar and ADS-B surveillance information service replacing RIS TAF – Aerodrome weather forecast TTF – Trend forecast UHF – Ultra high frequency band: 300 MHz to 3 GHz Unicom – Ground-based private operator aerodrome communications frequency UTC – Coordinated Universal Time VHF – Very high frequency band: 30 MHz to 300 MHz VFR – Visual flight rules VMC – Visual meteorological conditions VNC – Visual navigation chart VOR – VHF omni-directional radio range VTC – Visual terminal chart
