U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
Air Traffic Organization Policy

ORDER
JO 7340.2E
Effective Date:
July 24, 2014
 
     

Subject:  Contractions

[Back to Section 1. Decode]

B

Contraction

Definition

Usage

B

base leg

ATC

B

beginning of precipitation (time in minutes) (weather reports only)

NWS

B

Bering Standard Time (time groups only)

NWS

B

blue

GEN

B

center clearance delivered

ATC

BA

braking action

ICAO

BAC

below all clouds

ATC

BACLIN

baroclinic or baroclinic prognosis

NWS

BAFVC

bids accepted for the following vacancies

GEN

BAL

balance

GEN

BASE

cloud base

GEN

BASOPS

Base Operations Office

GEN

BATROP

barotropic or barotropic prognosis

NWS

BC

back course

GEN

BC

beginning climb

ATC

BC

British Columbia

NWS

BC

patches

METAR

BCFG

fog patches

NWS

BCH

beach

NWS

BCKG

backing

NWS

BCM

back course marker

GEN

BCM

become

GEN

BCN

beacon

GEN

BCREQ

broadcast requested

ATC

BCST

broadcast

GEN

BCSTN

broadcast station

GEN

BDA

Bermuda

NWS

BDAT

beacon data (digitized)

ATC

BDR

border

GEN

BDRY

boundary

ATC

BDSLD

bids solicited

GEN

BECMG

becoming (expected between 2 digit beginning hour and 2 digit ending hour)

TAF

BFDK

before dark

NWS

BFR

before

GEN

BGN

began or begin

GEN

BGND

begin or beginning descent

ATC

BHND

behind

GEN

BIFR

before encountering IFR conditions

ATC

BINOVC

breaks in overcast

NWS

BKN

broken

METAR

BL

blowing

METAR

BLD

build

NWS

BLDG

building

ICAO

BLDU

blowing dust

METAR

BLDUP

buildup

NWS

BLKHLS

Black Hills

NWS

BLKT

blanket

NWS

BLN

balloon

GEN

BLO

below

GEN

BLO

below clouds

ICAO

BLSA

blowing sand

METAR

BLSN

blowing snow

METAR

BLW

below

ICAO

BLX

block

ATC

BLZD

blizzard

NWS

BMBR

bomber

GEN

BMS

basic meteorological services

NWS

BND

bound

GEN

BNDRY

boundary

NWS

BNTH

beneath

GEN

BOMB

bombing

GEN

BOVC

base of overcast

NWS

BPOC

before proceeding on course

ATC

BPS

bytes per second

GEN

BPT

beginning procedure turn

ATC

BR

Bahama Route

ATC

BR

branch

GEN

BR

mist

METAR

BRAF

braking action fair

GEN

BRAG

braking action good

GEN

BRAN

braking action nil

GEN

BRAP

braking action poor

GEN

BRF

brief

NWS

BRG

bearing

GEN

BRGT

bright

GEN

BRITE

bright radar indicator tower equipment

GEN

BRK

break

NWS

BRKG

braking

ICAO

BRKHIC

breaks in higher overcast

NWS

BRKSHR

Berkshire

NWS

BRM

barometer

NWS

BS

commercial broadcasting station

ICAO

BSAF

bids solicited as follows

GEN

BSC

bird sweep completed

ATC

BSHP

beginning standard holding procedure

ATC

BSIAP

beginning straight­in approach

ATC

BSRAP

beginning standard range approach

ATC

BSRO

begin standard refuel orbit

ATC

BT

back taxiing

ATC

BTL

between layers

ICAO

BTN

between

ICAO

BTR

better

GEN

BTWN

between

NWS

BUEC

backup emergency communication

GEN

BUIC

backup interceptor control

ATC

BUL

bulletin

GEN

BUR

bureau

GEN

BUS

business

GEN

BY

blowing spray (weather reports only)

METAR

BYD

beyond

GEN

BZR

buzzer (radar)

GEN

 

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