AAL |
above aerodrome level |
ACD |
airways clearance delivery |
ADF |
automatic direction finder |
AESIS |
automatic en route information service |
AF |
audio frequency |
AFRU |
aerodrome frequency response unit |
AGL |
above ground level |
AI |
attitude indicator |
AIC |
Aeronautical Information Circular |
AIP |
Aeronautical Information Publication |
AIREP |
air report |
AIS |
aeronautical information service |
ALA |
aircraft landing area |
ALT |
altitude |
AM |
amplitude modulation |
AMSL |
above mean sea level |
APP |
approach control |
ARFOR |
area forecast |
ASI |
airspeed indicator |
ATIS |
automatic terminal information service |
ATPL |
air transport pilot licence |
ATS |
air traffic services |
AVGAS |
aviation gasoline |
AWIB |
aerodrome weather information broadcast |
AWS |
automatic weather station |
CAO |
Civil Aviation Order |
CAR |
Civil Aviation Regulation |
CASA |
Civil Aviation Safety Authority |
CASR |
Civil Aviation Safety Regulation |
CAVOK |
ceiling and visibility OK |
CENSAR |
centralised SARTIME |
CERT |
certified aerodrome |
CFI |
chief flying instructor |
CG |
centre of gravity |
CIR |
command instrument rating |
CLR |
clearance or clear |
COM |
communications |
CPL |
commercial pilot licence |
cps |
cycles per second |
CST |
central standard time |
CSuT |
central summer time |
CTA |
control area/controlled airspace |
CTAF |
common traffic advisory frequency |
CTR |
control zone |
CW |
carrier wave |
DA |
density altitude |
DG |
directional gyro |
DI |
direction indicator |
DME |
distance measuring equipment |
ELB |
emergency locator beacon |
ELT |
emergency locator transmitter |
EMERG |
emergency |
ENR |
en route (e.g AIP ENR) |
ERC |
En Route Chart |
ERSA |
En Route Supplement Australia |
EST |
Eastern Standard Time |
ESuT |
Eastern Summer Time |
ETA |
estimated time of arrival |
FAC |
facility |
FIA |
flight information area |
FIR |
flight information region |
FIS |
flight information service |
FL |
flight level |
FM |
frequency modulation |
FPM |
feet per minute |
FROL |
flight radiotelephone operator licence |
FS |
flight service |
FT |
feet |
GA |
general aviation |
GEN |
general (e.g. AIP GEN) |
GFPT |
General Flying Progress Test |
GNSS |
global navigation satellite system |
GPS |
global positioning system |
GS |
groundspeed |
HDG |
heading |
HF |
high frequency |
Hz |
hertz |
IAS |
indicated airspeed |
ICAO |
International Civil Aviation Organization |
IFF |
identification friend/foe |
IFR |
instrument flight rules |
ILS |
instrument landing system |
IMC |
instrument meteorological conditions |
ISA |
International Standard Atmosphere |
kHz |
kilohertz |
KIAS |
knots, indicated airspeed |
km |
kilometre |
kt |
knot |
KTAS |
knots, true airspeed |
L/D |
lift drag ratio |
LAME |
licensed aircraft maintenance engineer |
LF |
low frequency |
LL |
lower limits |
LMT |
local mean time |
LSALT |
lowest safe altitude |
LST |
local standard time |
MAP |
manifold absolute pressure |
MET |
meteorology |
METAR |
aviation routine weather report |
MF |
medium frequency |
MHz |
megahertz |
MIL |
military aerodrome (could be CTAF after hours) |
MLJ |
military low jet (route) |
MP |
manifold pressure |
MULTICOM |
chatter frequency |
NAV |
navigation |
NAVAID |
navigation aid |
NDB |
non directional beacon |
NOTAM |
notice to airmen |
PAX |
passengers |
PCA |
Planning Chart Australia |
PIC |
pilot in command |
POB |
persons on board |
POH |
pilot’s operating handbook |
PPL |
private pilot licence |
PRD |
prohibited, restricted and danger areas |
PTT |
press to talk (or transmit) |
PVT |
private category flight |
QNH |
altimeter pressure datum to show vertical distance above local mean sea level (AMSL) |
R/T |
radio telephony |
RA |
recreational aviation |
RBI |
relative bearing indicator |
RCC |
rescue coordination centre |
REG |
registered aerodrome |
RF |
radio frequency |
RMI |
radio magnetic indicator |
ROC |
rate of climb |
ROD |
rate of descent |
RPM |
revolutions per minute |
RPT |
regular public transport |
RQMNTS |
requirements |
RTF |
radio telephone |
RWY |
runway |
SAR |
search and rescue |
SARTIME |
a nominated time by which search action will be initiated |
SARWATCH |
a generic term covering SAR alerting, based on position reporting, scheduled reporting times (SKEDS), or a nominated SARTIME |
SBY |
standby |
SIGMET |
significant weather warning |
SIS |
surveillance information service |
SMC |
surface movement control |
SSR |
secondary surveillance radar |
SUBJ |
subject to |
TAC |
terminal area chart |
TAF |
terminal area forecast |
TAS |
true airspeed |
TR |
track over the ground |
TST |
test |
TWR |
aerodrome control tower |
UHF |
ultra high frequency |
UNCR |
unregistered (uncertified) aerodrome |
UNICOM |
universal communications (frequency) |
USG |
US gallon |
UTC |
coordinated universal time |
UV |
ultraviolet |
VFR |
visual flight rules |
VHF |
very high frequency |
VLF |
very low frequency |
VMC |
visual meteorological conditions |
VNC |
visual navigation chart (1,500,000) |
VOR |
VHF omni-directional radio range |
VSI |
vertical speed indicator |
VTC |
Visual Terminal Chart (1,250,000) |
W/V |
wind velocity |
WAC |
World Aeronautical Chart (1,1,000,000) |
WST |
Western Standard Time |
WX |
weather |
XW or X-wind |
crosswind |