A-B C-E F-H I-M N-R   S-T  U-Z




AAE above aerodrome elevation
ACA Arctic Control Area
ACAS airborne collision avoidance system
ACC area control centre
AD airworthiness directive
ADF automatic direction finder, or automatic direction-finding equipment
ADIZ air defence identification zone
AGL above ground level
A.I.P. aeronautical information publication
AIRMET short-term meteorological information
AME aircraft maintenance engineer
APU auxiliary power unit
ARCAL aircraft radio control of aerodrome lighting
ASDA accelerate stop distance available
ASI airspeed indicator
ASL above sea level
ASR airport surveillance radar
ATC air traffic control
ATF aerodrome traffic frequency
ATIS automatic terminal information service
ATPL airline transport pilot licence
ATS air traffic services
AWOS automated weather observation systems
   
BC back course
BFL balanced field length