ACAS /TCAS Airborne or Traffic Collision Avoidance System. These will have a further descriptor of 'RA' - Resolution Advisory or 'TA' - Traffic Advisory
ADS-B/C Automatic Dependent Surveillance - Broadcast / Contract
AGL Above Ground Level
AHRS Attitude & Heading Reference System
AMSL Above Mean Sea Level
APU Auxiliary Power Unit
ATC Air Traffic Control
ATIS Automatic Terminal Information Service 
CPDLC Controller Pilot Data Link Communications
CTA Control Area
CTAF Common Traffic Advisory Frequency
CTR Control Zone
DME Distance Measuring Equipment
ECAM Electronic Centralised Aircraft Monitor
E/GPWS Enhanced / Ground Proximity Warning System
EICAS Engine Indicating and Crew Alerting System
ELT  Emergency Locator Transmitter (sometimes referred to as an ELB - Emergency Locator Beacon or PLB - Personal Locator beacon)
FDR Flight data record
FL Flight Level
FMS Flight Management System (covers FMCG & FMC) 
ft Feet
GPS Global Positioning System
GNSS Global Navigation Satellite System
HF High Frequency
IAS Indicated Air Speed
IFR Instrument Flight Rules
ILS Instrument Landing System
IMC Instrument Meteorological Conditions
IVA Independent Visual Approach
kt Knots
LAHSO Land and Hold Short Operations
m Metres
MAYDAY Radio transmission from flight crew indicating potential life threatening emergency
MEL   Minimum Equipment List
MFD Multi-Function Display
NDB Non Directional Beacon
NM Nautical Mile
NOTAM Notice to Airmen
NVFR Night Visual Flight Rules
NVG Night Vision Goggles 
OCTA Outside Controlled Airspace
PAL Pilot Activated Lighting
PAN Radio transmission from flight crew indicating an uncertainty or alert
PAPI Precision Approach Path Indicator
PFD Primary Flight Display
RNAV Area Navigation
RNP Required Navigation Performance
RPA/S Remotely Piloted Aircraft / System
RPM Revolutions Per Minute
RVSM Reduced Vertical Separation Minima
SARTIME Latest expected arrival at destination as planned by flight crew
SID Standard Instrument Departure
STAR Standard Arrival Route
STCA Short Term Conflict Alert
TAAATS The Australian Advanced Air Traffic System
TAF Terminal Area Forecast
VFR Visual Flight Rules
VHF Very High Frequency
VMC Visual Meteorological Conditions
VOR VHF Omni-directional Radio Range



Superseded Acronyms

*AIRPROX An aircraft comes into such close proximity with another aircraft, terrain, person or object where immediate evasive action was required or should have been taken either airborne or on the ground.
*ALERFA Alert phase
*ARO Acts, Regs and Order
*ASIR Air Safety Incident Report
*ATSB Australian Transport Safety Bureau
*AusFIC Australian Flight Information Centre
*AusSAR Australian Search and Rescue
*BOS Breakdown of Separation
*CASA Civil Aviation Safety Authority
*CAVOK Visibility, cloud and present weather better than prescribed values or conditions
*CENSAR Centralised SARTIME Database
*DETRESFA Distress phase
*ESIR Electronic Safety Incident Report
*ETA Estimated time of arrival
*ETD Estimated time of departure
FIR Flight information region
*ft/min Feet per minute
*FTC Failure to Comply
*GAAP General Aviation Airport Procedures
*INCERFA Uncertainty phase
*LLZ Localiser
*MBZ Mandatory Broadcast Zone
*NAIPS National Aeronautical Information Processing System
*OASIS Occurrence Analysis and Safety Information System
*OKTA Eighths of sky cover
*RFFS Rescue and fire fighting service
*RIS Radar Information Service
*SAR Search and Rescue
*SATCOM Satellite Communication
*SSR Secondary Surveillance Radar
*UHF Ultra high frequency
*VCA Violation of controlled airspace
*VEC Visual En-route Chart



 Getting Started


Last update 24 June 2022