Acronyms

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B

Acronym	Meaning	Source
B	Blue	ICAO/AIP
BA	Braking action	ICAO
BARA	Board of Airline Representatives of Australia
BASA	Bilateral Aviation Safety Agreement
BASE	Cloud Base (met)	AIS
BASI	Bureau of Air Safety Investigation (now part of ATSB)
BCFG	Fog Patches (met)	AIS
BCN	Beacon (aeronautical ground light)	AIS
BCST	Broadcast	AIS
BDRY	Boundary	AIS
BECMG	Becoming	AIS
BETA	Manually controlled mode for constant speed propellers or turbo prop aircraft
BFR	Before	AIS
BIP-M	Basic Instruction Package for Meteorologists
BIPMT	Basic Instruction Package for Meteorological Technicians
BITE	Built In Test Equipment	WATOG
BKN	Broken (cloud descriptor) (met)	AIS
BL...	Blowing (followed by DU=dust, SA=sand or SN=snow)	AIS
BLDG	Building	AIS
BLO	Below Clouds	AIS
BLW	Below	AIS
BOM	Bureau of Meteorology	AIS
BOMB	Bombing	AIS
BR	Mist	AIS
BRF	Short (used to indicate type of approach)	AIS
BRG	Bearing	AIS
BRKG	Braking	AIS
BRW	Brakes release weight
BS	Broadcasting Station (Commercial)	AIS
BTL	Between Layers	AIS
BTN	Between	AIS