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BBM. BBm
2 Bring-back load.
BBM, BBm Back beam.
BBMF Battle of Britain Memorial Flight (RAF).
BBN 1 Basic backup network for future civil navaids
(FRN).
2 Baseband node.
BBOE Billion barrels oil equivalent.
BBSU British Bombing Survey Unit.
BBU Battery back-up unit.
BBW 1 Brake by wire.
2 Bring-back weight.
BC 1 Boron carbide armour.
2 Back course.
3 Bus (2) controller.
4 Bomber Command (RAF, USAAF).
5 Basic combat trainer category (USAAC, 1936–40).
6 Patches [of cloud] (ICAO).
7 Bottom of cylinder.
8 Become, becoming.
BCA 1 Board of Civil Aviation (Sweden).
2 Baro-corrected altitude.
3 Best cruise altitude.
4 Belgian Cockpit Association, also called ABPNL.
5 British Cargo Alliance [carrier pressure group, office
London].
BCAA British Cargo Airline Alliance.
BCAC British Columbia Aviation Council.
BCAM Best cruise altitude/Mach.
BCAOC Balkan Combined Air Operations Centre
(NATO).
BCARs British Civil Air, or Airworthiness, Requirements.
BCAS Beacon-based collision-avoidance system.
BCASC British Civil Aviation Standing Conference,
now BATA.
BCATP British Commonwealth Air Training Plan
(1939–45).
BCBP Bar-coded boarding pass.
BCBS Bomber Command Bombing School (RAF).
BCC British Chambers of Commerce, representing
126,000+ businesses.
BCD, bcd 1 Binary coded decimal.
2 Bulk chaff dispenser.
BCE Battlefield control element.
BCF Bromochlorodifluoromethane (fire extinguishant).
BC/FC Beam control, fire control [ABL 1 ]
BCFG Fog patches.
BCFR Bomber Command Forward Relay (RAF).
BCH Binary coded hamming.
BC 3 I Battlefield command and control communications
and intelligence.
BCIU Bus control and interface unit.
BCKG Backing (ICAO).
BCL Braked conventional landing (V/STOL).
BCM 1 Basic combat manoeuvring, series of manoeuvres
simulating interceptions and close dogfights.
2 Best cruise Mach number.
3 Background clutter matching.
4 Back-course marker.
BCMG Becoming.
BCMP Bird control management plan.
bcn Beacon.
BCO, bco Binary coded octal.
BDS
BCOB Broken cloud[s] or better.
BCP 1 Battery command post.
2 BIT control panel.
3 Break[ing] cloud procedure.
BCPL See Basic commercial pilot’s licence.
BCPR Broad – coverage photo-reconnaissance (USAF
satellites).
BCPT Basic communications procedures trainer, for
AEOs.
BCR 1 European Community Bureau of Reference
(co-ordinates R & D).
2 Battle casualty replacement.
3 Bombing, combat and reconnaissance.
4 Business concept review.
B/CRS Back course.
BCRU Battery charger regulator unit.
BCS 1 British Computer Society.
2 Beam control system, esp. for laser on platform
subject to jitter and atmospheric turbulence.
3 Block check sequence.
4 Buoy communication system.
BCSG Bus-computer symbol generator.
BCST, bcst Broadcast.
BCSV Bearing-compartment scavenge valve.
BCT Brigade Combat Team (USA).
BCU 1 Bird control unit (on airfield).
2 Bus control unit.
BCV Belly cargo volume.
BCW Binary chemical warhead.
BD 1 Blowing dust.
2 Baud (correct abbreviation is Bd).
B/D Bearing and distance.
Bd Baud.
bd Candle (unit of luminous intensity), abb.
BDA Bomb (or battle) damage assessment.
BDAC Bilateral Defence/Defense Acquisition Committee
[being negotiated from 2002 to resolve problems
caused by US refusal to disclose information to UK
defence partners].
BDC, b.d.c. 1 Bottom dead centre.
2 Bomb detection chamber.
BDFA British Disabled Flying Association [office,
Biggin Hill] (UK).
BDHI Bearing/distance/heading indicator.
B/DHSI, BDHSI Bearing/distance horizontal-situation
indicator.
BDI 1 Bearing/distance indicator.
2 Association of defence industries (G)
3 Bomb-damage intelligence.
BDL Bistable-diode laser.
BDLI Bundesverband der Deutschen Luft- und
Raumfahrtindustrie eV [German aerospace industry
association; office, Bonn D-53179] (G).
BDM Buhr design method.
BDMIPG British Defence Manufacturers Industrial
Participation Group.
BDMIS Business data management and invoicing.
BDOE Barrels per day oil equivalent.
BDP Bitsync descrambler preprocessor.
BDR 1 Battle-damage repair.
2 Basic dispatch rate, or reliability [percent].
BDRY Boundary.
BDS 1 Comm-B designation subfield.
2 Boost defence segment.
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