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dBi
2 Downlink block identifier.
3 Data-bus input.
dBi Decibels referenced to isotropic antenna or above
isotropic circular.
dBm Decibel meter, unit of power referenced to
1mW=dB×10 –3 .
DBM/C Data bus monitor/controller.
DBMS Database management system; also rendered as
DBMX.
dBm 2 Measure of radar cross-section using m 2 as reference.
DB/N Data-base No.
DBNS Doppler bombing/navigation system.
DBO Data-bus output.
DBPS Digital [electron] beam-positioning system.
DBR 1 Dual-band radar.
2 Damaged beyond repair.
DBS 1 Doppler beam-sharpening.
2 Direct-broadcast satellite, or service.
3 Database storage.
DBSA Directorate for Broadening Smart Acquistion
(MoD, UK).
dBsm Decibel unit of radar beam cross-section referenced
to 1 m 2 ; dBm 2 more common.
DBT Diffusion-bonded titanium.
DBTE Data-bus test equipment.
DBTF Duct-burning turbofan.
DBU Database unit.
DBUF Defence buildup plan, or programme (J).
DBV Diagonally braked vehicle, for runway friction
measures.
DBVOR Doppler VOR with weather broadcast. Hence
DBVortac.
DBW Differential ballistic wind.
dBw Decibels referenced to 1 Watt.
DBWS Database work-station.
DC 1 Depth charge.
2 Departure control.
3 Direct cycle.
4 Display controller.
5 Directionally cast.
6 Drag control.
7 Dead centre.
8 Detection centre (homing).
9 Dry chemical.
10 Direct cost.
11 Digital compass.
dc, d.c. Direct current.
DCA 1 Defense Communications Agency (US).
2 Directorate of Civil Aviation.
3 Defense Contre Avions (F, 1935–40).
4 Department of Civil Aviation (A, Braz.).
5 Dual-capable aircraft.
6 Document content architecture (IBM).
7 Defensive counter-air.
8 Design Chain Accelerator.
9 Drift correction angle.
10 Defense Certification Authority.
11 Defence Codification Agency (UK).
DCAA Defense Contract Audit Agency (US).
DCACMRM Defense and control airspace configuration/manufacturing
resource management.
DCAOC Deployable combined air & space operations
centre (NATO).
DCNO
DCAPES Deliberate & Crisis Action Planning &
Execution Segments [part of GCSS] (USAF).
D-carts Decoy cartridges.
DCAS 1 Deputy Chief of the Air Staff (UK).
2 Digital core avionics system.
3 Defense Contract Administration Service (DoD).
4 Digitally controlled audio system.
DCAV STOVL (F).
DCC 1 Drone Control Center.
2 Direct computer control.
3 Digital computer complex.
4 Data collector correlator.
DCCA Direction Centrale du Commissariat de l’Air
(F).
DCCR Display-channel complex rehost.
DCD 1 Data collector and diagnoster.
2 Data-collection device (helicopter).
3 Double-channel duplex.
4 Damage control deck [carrier].
DCDI Digital course deviation indicator.
DCDS Deputy Chief of the Defence Staff (UK).
DCDU 1 Datalink control and display unit (Fans).
2 Digital, or data, communications and display unit.
DCE 1 Data communications equipment.
2 Data-circuit terminating equipment.
DCEE Distributed continuous experimentation environment.
DCFS Digitally controlled frequency service.
DCG Direct-current generator.
DCGA Deck closed, go-around.
DCGF Data-conversion gateway function.
DCGS 1 Distributed common ground system [UAV].
2 Distributed common group, or ground, station.
DCH Destination change (input button).
DCI 1 DCMS crew-member interface; replaced by PCC
(5).
2 Defence-capabilities initiative (NATO), or interface.
3 Director of Central Intelligence (DoD).
DCIC Defence Capability Investment Committee
(Australia).
DCIU Digital control and interface unit.
DCKG Docking.
DCL Defence Contractors List (UK).
DCM 1 Defense Contract Management; A adds
Agency, C Command or Committee (US).
2 Data-conversion management; F adds function.
3 Diagnostic and condition monitoring.
DCMAA Direction Centrale du Matériel de l’Armée de
l’Air (F).
DCMF Data communication management function.
DCMS 1 Digital, or data, communications management
system.
2 Door control and monitoring system.
dcmsnd Decommissioned.
DCMT Defence College of Management and
Technology [Shrivenham, Wilts.] (MoD, UK).
DCMU Digitally coloured map unit.
DCN 1 Drawing, or design, or document, change
notice.
2 The Defence Contractors’ Network [office, Bristol
BS99 5ME] (UK)
3 Diplomatic clearance number.
DCNO Deputy Chief of Naval Operations.
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