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DIMSS
DIMSS Dynamic interface modeling and simulation
system.
DIN 1 Deutsches Institut für Normung eV [equivalent
of BSI, NBS; office D-10787 Berlin] (G).
2 Digital inertial navigation.
DINA Direct noise amplification.
DINAS, Dinas Digital inertial nav/attack system.
DINFIA Direction Nacional de Fabricaciones e
Investigaciones Aeronauticas (Arg.).
dinghy Small boat, usually of inflatable rubberised
fabric, for use by crew and passengers after aircraft has
ditched. Correct term is liferaft.
dinghy drill Procedure for unpacking, inflating and
entering dinghy.
dining-in night Formal dinner, usually once per month,
attended by all members of mess and invited guests
(RAF).
dinking Use of thin blade-like shaped die(s) to cut soft
sheet materials such as leather, cloth, rubber or felt, and
to cut lightening holes in thin sheet-metal; inexpensive die
is used, and cutting action is by steady pressure or hand
hammer.
DINS Digital inertial navigation system.
DIO 1 Defence Industry Office [Sydney, NSW 2000]
(Australia).
2 Distributed Information Operation (USN).
diode Two-electrode thermionic valve containing
cathode and anode, or semiconductor device having
unidirectional conductivity.
diode lamp Semiconductor diode which, when subject to
applied voltage, emits visible light. Smaller than most
switchable light sources. Also known as light-emitting
diode (LED).
DIOT & E Dedicated initial operational test and evaluation,
requires four primary aircraft plus backup, all close
to production configuration.
DIP 1 Digital image processing.
2 Defense industrial plant (US); EC adds ‘equipment
center’.
3 Defense industrial participation.
4 Defence Industrial Policy (UK, October 2002).
5 Debtor in possession.
6 Dual inline package [ICs].
7 Data-interrupt program.
8 Diplexer.
dip 1 Angle between magnetic compass needle perfectly
poised or on horizontal axis and local horizontal plane.
Also known as magnetic inclination.
2 Vertical angle at eye of observer between astronomical
horizon and apparent line of sight to visible
horizon.
3 Angle between local horizontal and lines of force of
terrestrial magnetic field (indicated by [1]).
4 Salutation by briefly rolling aircraft towards
observer, to * wing in salute.
DIPA Defence Industrial Program Authorization.
diplexer Device permitting antenna (aerial) system to be
used simultaneously or separately by two transmitters.
DIP/LNA Diplexer and low-noise amplifier.
diplomatic authorization Authority for over-flight or
landing obtained at government level.
diplomatic clearance The number and callsign allocated
to a military aircraft to permit it to overfly foreign territory.
direct force control
diplomatic locker Secure compartment used solely for
documents and other items being carried on behalf of the
government to which the aircraft is registered.
dipole 1 System composed of two separated and equal
electric or magnetic charges of opposite sign.
2 Antenna (aerial) composed of two conductors in line,
fed at mid-point. Total length equal to one half wavelength.
DIPP Defense/industry partnership program (Canada).
dipper See fuel dipper.
dipping sonobuoy One designed to be suspended but not
released from helicopter and immersed in selected places
in sea.
DIPR Directorate of Intellectual Property Rights (UK).
DIPS Dipole inches per second (chaff dispenser).
dipstick Graduated quasi-vertical gauge of fluid level in
container, usually disconnected for reading.
dipsydoodle Official term for rollercoaster manoeuvre
performed by SR-71 and some other supercruise aircraft
following inflight refuelling, comprising dive to supersonic
speed followed by accelerating climb back to
operating height.
DIQAP Defence Industries Quality-Assurance Panel
(UK).
DIR 1 Diagnostic imaging radar.
2 Distributed IR.
3 Direct, direction, director.
4 Digital instant recall.
5 Dwell illumination region.
Dircen Direction des Centres d’Experimentations
Nucléaires (F).
Dircm Directional, or directed, IR countermeasures
(said as a word, USAF).
direct-action fuze See DA fuze.
direct approach Unflared landing.
direct broadcast Satellite powerful enough to transmit
TV direct to terrestrial recipient or subscriber.
direct coupling Association of two circuits by having an
inductor, condenser or resistor common to both.
direct-cranking starter Hand crank or starter geared to
crankshaft to start engine.
direct current Electric current constant in direction and
magnitude.
Directd Digital imaging reconnaissance demonstrator.
direct damage assessment Examination of actual strike
area by air or ground observation or air photography.
directed-energy weapon One whose effect is produced by
a high-power beam, normally of EM radiation, having
essentially instantaneous effect at a distance. Most
important are lasers and HPM.
directed-flow reverser Reverser whose discharge in the
reverse mode is confined within limited angular limits to
avoid the airframe or FOD/reingestion problems.
directed mode DME mode allowing FMCS to select one
to five DMEs for interrogation.
directed slipstream Means of achieving STOL in which
slipstream created by propellers or fans is blown over
entire wing. Also known as deflected slipstream.
direct flight 1 Portions of flight not flown on radials or
courses of established airways.
2 Point-to-point space flight, without rendezvous,
docking or other manoeuvre.
direct force control Control of aeroplane trajectory by
application of force normal to flightpath without prior
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