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6 – i ndex
AUX
Auxiliary
AVM
Abrupt Vertical Manoeuvres
(by theMIL)
AVBL
Available
AVG
Average
+AVGAS
AviationGasoline
AWIS
AerodromeWeather
InformationService
AWK
AerialWork
AWS
AutomaticWeather Station
AWY
Airway
AZM
Azimuth
B
B
Blue
+BASE
CloudBase
BCFG
FogPatches
BCN
Beacon (aeronautical ground
light)
BCST
Broadcast
BCTA
Base of CTA (used only on
charts)
BDRY
Boundary
BECMG
Becoming
BFR
Before
BKN
Broken (cloud descriptor)
BL
Blowing (followed by
DU= dust, SA= sand or SN=
snow)
BLDG
Building
BLO
BelowClouds
BLW
Below
BOMB
Bombing
BR
Mist
BRF
Short (used to indicate type of
approach)
BRG
Bearing
BRKG
Braking
BS
BroadcastingStation
Commercial)
BTL
Between Layers
BTN
Between
C
0
C
DegreesCelsius (Centigrade)
C
Centre (Runway)
CA/GRS
CertifiedAir / GroundRadio
Service
CAO
Civil AviationOrder
CAR
Civil AviationRegulation
CASA
Civil AviationSafetyAuthority
+CAT
Category
abbreviations and acronyms
CODE DEFINITION
CODE DEFINITION