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DASS
DASS 1 Defensive-aids subsystem.
2 Dynamic-assembly scheduling system.
DAST, Dast Drone[s] for aerodynamic and structural
testing (NASA).
DAT 1 Damage-to-aircraft trials.
2 Digital audio tape.
DATA Defense Air Transportation Association (US).
Data, Data ¯¯¯¯¯¯ A MIL-STD-1553B bus carries Data in one
channel and Data ¯¯¯¯¯¯ in the other.
databus Highway for digital data, most common linking
aircraft sensors and other air or ground systems being
MIL-STD-1553B or Arinc 419 (one-way) or Arinc 619
10base T (two-way).
Datac Digital-access terminal-area control, or communication
[see Datacs].
DATACOM, Datacom Data compilation, large handbook
and CD which attempts to give designers complete
knowledge of effect on lift and moment of changes in
design (USAF).
Datacs Digital autonomous terminal access communications
system, became Arinc 629 (Boeing).
data fusion Integration and management of possibly
billions per second of bits of information from recon
sensors, C 3 and battle management systems.
datalink 1 Any highway or channel along which
messages are sent in digital form.
2 Communications channel or circuit used to transmit
data from sensor to computer, readout device or storage.
data-logger Short-term store for digital or analog information,
eg for one flight or one week, periodically read
back to build up service history of system, engines or other
devices.
data plate Permanently fixed to aircraft, engine or other
product, giving basic data, serial numbers and dates.
Datar, DATAR 1 Detection and tactical alert of radar
(helicopter RWR).
2 Délégation de l’Amenagement du Territoire et à
l’Action Régionale [aeronautical subcontract organization;
Paris F-75007] (F).
data reconstruction Assembling correct bar-codes from
brief any-angle glimpses (mainly in checking baggage).
data recorder Device, usually electronic, for recording
data [previously analog, now mainly digital] for subsequent
playback and analysis (see flight recorder,
maintenance recorder).
Datas Data-link and transponder analysis system.
Data-3 Inmarsat system enabling aircraft to link direct
to ground networks.
Datco Duty air-traffic-control officer.
DATF Deployable air task force.
DATIS, D-Atis, Datis 1 Digital air-traffic information
service, or system.
2 Digital automated, or automatic, terminal information
service.
DATM Dummy air-training missile.
Datmas Danish air-traffic management system (2007-).
DATS Data-acquisition and telemetry system.
Datsa Depot automatic test system for avionics.
DATT, DAtt Defense Attaché (US).
DATTS Data acquisition, telecommand and tracking
station.
datum 1 Numerical, geometric or spatial reference or
base for measurement of other quantities.
2 Vertical (rarely, horizontal or other) reference line
from which all structural parts are measured and
identified. Most * lines are exactly at, or close in front of
or behind, nose; thus, frame 443 is a nominal 443 in or mm
behind*; wing * is often aircraft centreline.
datum target A point or straight line used to establish a
datum.
DAU 1 Directly Administered Unit[s] (RAF).
2 Digital amplifier unit.
3 Data-acquisition unit.
DAUG Danger-area users group (NATS).
Da Vinci Departure and arrival integrated management
system for co-operative improvement of airport traffic
flow (Euret).
Davis barrier Retractable crash barrier across carrier (1)
deck.
Davis tables List altitude and azimuth of astro-navigation
targets.
Davis wing High-aspect ratio wing designed by David R.
Davis; intended to cruise at low angle of attack with low
drag.
DAVSS Doppler/acoustic vortex sensing system.
DAVVL Birdstrike committee, with several sub units
(G).
DAW (A) Dedicated all-weather (aircraft).
day Mean solar * is defined at 8.64 × 10 4 s; sidereal * is
approximately 8.616 × 10 4 s.
Day-Glo Family of dyes and paints with property of
converting to visible light wavelengths outside normal
visible spectrum, thus giving unnaturally bright hues.
day/night Equipment giving cheap and convenient IFR
training, using tinted pilot goggles and complementary
tinted cockpit transparency (eg blue goggles and amber
canopy or red + green); pilot sees clear but tinted cockpit
while outside world appears black.
DB 1 Development batch.
2 Direct broadcast. [S adds satellite, service or system].
3 Database.
4 Databus.
5 Double base (rocket propellant).
6 Diffusion bonding.
7 Day bombardment category (USA 1919–24).
8 Denied boarding.
dB Decibel, see noise.
DBA 1 Dominant battlespace awareness.
2 long-range bombing aviation (USSR, R).
dBA Decibels absolute, or A-weighted, see noise.
d.b.a. Doing business as.
DBC 1 Denied boarding compensation for bumped
passengers; for pax reaching their destination within 4 h
of original booked time 50% of flight-coupon value in
Europe, 200% in US. No compensation for aircraft under
60 seats.
2 DCMS bus coupler.
3 Data-bank, Comecon.
DBE 1 Data bank, Eurocontrol.
2 Down between engines [rotation of handed propellers
in four-engined aircraft].
DBF
1 Doppler beat frequency.
2 Digital beam forming.
3 Destroyed by fire.
4 Doppler blade flash.
DBGS Data-base generation system.
DBFM Defensive basic flight manoeuvres.
DBI 1 DCMS bus interface.
DBI
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