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

ORDER
JO 7340.2D
Effective Date:
May 2, 2013
 
     

Subject:  Contractions
       Includes: Change 1 effective 8/22/13 and Change 2 effective 12/12/13    
 

[Back to Section 2. Encode]

B

Definition

Contraction

Usage

back course

BC

GEN

back course marker

BCM

GEN

back taxiing

BT

ATC

backing

BCKG

NWS

backup emergency communication

BUEC

GEN

backup interceptor control

BUIC

ATC

Bahama Route

BR

ATC

balance

BAL

GEN

balloon

BLN

GEN

baroclinic or baroclinic prognosis

BACLIN

NWS

barometer

BRM

NWS

barotropic or barotropic prognosis

BATROP

NWS

base leg

B

ATC

base of overcast

BOVC

NWS

Base Operations Office

BASOPS

GEN

basic meteorological services

BMS

NWS

beach

BCH

NWS

beacon

BCN

GEN

beacon data (digitized)

BDAT

ATC

bearing

BRG

GEN

become

BCM

GEN

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

BECMG

TAF

Before

BFR

GEN

before dark

BFDK

NWS

before encountering IFR conditions

BIFR

ATC

before proceeding on course

BPOC

ATC

began or begin

BGN

GEN

begin or beginning descent

BGND

ATC

begin standard refuel orbit

BSRO

ATC

beginning climb

BC

ATC

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

B

NWS

beginning procedure turn

BPT

ATC

beginning standard holding procedure

BSHP

ATC

beginning standard range approach

BSRAP

ATC

beginning straight­in approach

BSIAP

ATC

Behind

BHND

GEN

Below

BLO

GEN

Below

BLW

ICAO

below all clouds

BAC

ATC

below clouds

BLO

ICAO

beneath

BNTH

GEN

Bering Standard Time (time groups only)

B

NWS

Berkshire

BRKSHR

NWS

Bermuda

BDA

NWS

Better

BTR

GEN

Between

BTN

ICAO

Between

BTWN

NWS

between layers

BTL

ICAO

Beyond

BYD

GEN

bids accepted for the following vacancies

BAFVC

GEN

bids solicited

BDSLD

GEN

bids solicited as follows

BSAF

GEN

bird sweep completed

BSC

ATC

Black Hills

BLKHLS

NWS

Blanket

BLKT

NWS

Blizzard

BLZD

NWS

Block

BLX

ATC

Blowing

BL

METAR

blowing dust

BLDU

METAR

blowing sand

BLSA

METAR

blowing snow

BLSN

METAR

blowing spray (weather reports only)

BY

METAR

Blue

B

GEN

Bomber

BMBR

GEN

Bombing

BOMB

GEN

Border

BDR

GEN

Bound

BND

GEN

Boundary

BDRY

ATC

boundary

BNDRY

NWS

braking

BRKG

ICAO

braking action

BA

ICAO

braking action fair

BRAF

GEN

braking action good

BRAG

GEN

braking action nil

BRAN

GEN

braking action poor

BRAP

GEN

branch

BR

GEN

break

BRK

NWS

breaks in higher overcast

BRKHIC

NWS

breaks in overcast

BINOVC

NWS

brief

BRF

NWS

bright

BRGT

GEN

bright radar indicator tower equipment

BRITE

GEN

British Columbia

BC

NWS

broadcast

BCST

GEN

broadcast requested

BCREQ

ATC

broadcast station

BCSTN

GEN

broken

BKN

METAR

build

BLD

NWS

building

BLDG

ICAO

buildup

BLDUP

NWS

bulletin

BUL

GEN

bureau

BUR

GEN

business

BUS

GEN

buzzer (radar)

BZR

GEN

by visual reference to the ground

VSA

ICAO

by way of

VIA

GEN

bytes per second

BPS

GEN

 

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