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VHF radiocommunications

Abbreviations and acronyms

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The following abbreviations and acronyms appear in — or are associated with — this VHF radiocommunications guide; however the list is not yet complete.

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

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Groundschool – VHF Radiocommunications Guide

| Guide content | [Abbreviations and acronyms] |

| 1. Transmitter licensing | 2. R/T phrasing | 3. VHF characteristics and radio operation |

| 4. Microair 760 transceiver | 5. R/T procedures | 6. Safety and emergency procedures |

| 7. Aviation Distress Beacons | 8. Understanding SAR services |

Copyright © 2003—2012 John Brandon     [contact information]