1Dk4eXg

ADSI
system in which saturation in dense traffic is avoided by
interrogating each aircraft (once acquired) only once on
each aerial rotation instead of about 20 times.
Transponders reply only when selected by discrete
address code, reducing number of replies and mutual
interference and opening up space for additional information
(such as rate of turn) helpful to ATC computers
(see DABS).
ADSI Air-defense systems integrator (UAV).
ADSIA Allied Data-Systems Interoperability Agency
[Brussels] (NATO).
Adsid Air-delivered seismic detection sensor.
ADSK Air-droppable, or air-dropped, survival kit.
ADSL Aerosuisse Dachverband der Schweizerischen
Luftfahrt [aeronautical society; CH-3001 Bern]
(Switzerland).
ADSM Air defence suppression missile.
adsorption Removal of molecules of gas or liquid by
adhesion to solid surface; activated carbon has very large
surface area and is powerful adsorber.
ADSP 1 Advanced digital signal processor.
2 Automatic dependent surveillance panel.
3 Aeronautical Data and Safety Service (Inmarsat).
ADSS 1 Aeronautical decision support system,
providing instant paperless access to manuals, maps and
emergency procedures.
2 Automatic dependent surveillance system.
3 Aeronautical Data and Safety Service (Inmarsat).
ADSU 1 Air-data sensor unit.
2 Automatic dependent surveillance unit.
ADT 1 Approved departure time.
2 Automatically deployable transmitter.
3 Air-data transducer.
4 Air-data [or advanced, or alphanumeric, display]
terminal.
5 Automatic detection and tracking.
6 Active-denial technology.
7 Accessories drive train.
8 Ada development toolkit.
ADT 3 , ADT3 Air defence tactical training theatre.
ADTC Armament Development Test Center (USAF,
Eglin AFB).
ADTN Administrative data-transmission network.
ADTS 1 Air-defence threat simulator.
2 Approved departure times.
ADTU Air-data transfer unit.
ADU 1 Alignment display unit (INS).
2 Auxiliary display unit.
3 Avionics [or annotation] display unit.
4 Air-data unit.
5 Actuator drive unit, in digital FCS.
6 Audio distribution unit.
7 Activity display unit (ESM).
8 Air Disarmament Unit (RAF).
9 Aircraft Delivery Unit (UK).
ADV 1 Arbeitsgemeinschaft Deutscher Verkehrsflughafen
eV [Federal German Airports Association;
D-70624 Stuttgart] (G).
2 Air-defence variant.
ADV, Adv 1 Advise, or advisory area.
2 Advance (UK usage).
advance 1 To * throttle = to open throttle, increase
power.
Adviser
2 In piston engine, to cause ignition spark to occur
earlier in each cycle.
3 Forward movement of propeller (see propeller pitch).
advance, angle of See propeller pitch.
advanced Generalised (overworked) adjective meaning
new, complicated and typifying latest technology.
advanced aerobatics Flight manoeuvres with no limits
apart from airframe/pilot limits.
advanced airfield, base Base or airfield, usually with
minimal facilities, in or near objective area of theatre of
operations.
Advanced aviation training device Synthetic trainer for
procedures [FAR Pts 61 and 141] and various instrument
and system checks.
advanced common flightdeck Retrofit, initially on FedEx
DC-10s, based on MD-11.
advanced flow-control procedure Any of six theoretical
or experimental techniques for ATC in high-traffic
airspace.
advanced high-frequency material New coatings
[currently classified] for LO aircraft which eliminate the
need for laborious maintenance between missions.
advance/diameter ratio Ratio between distance aircraft
moves forward for one revolution of propeller(s), or helicopter
rotor, under specified conditions, and propeller
diameter. Expressed as
J= –––
V
nD
where V is TAS, n rotational speed and D diameter.
advanced stall Stall allowed to develop fully, yet usually
with some lateral control. Many definitions claim longitudinal
control must remain, but nose-down rotation is
invariably automatic (see g-break, stall).
advanced tactial targeting Air-to-air system using Link-
16, SADL and other links from TTNT to share
information about surface emitters (USAF).
advanced trainer Former military category, more
powerful and complicated than ab initio/primary/basic
trainer and capable of simulating or performing combat
duties when fitted with armament.
advance ratio See advance/diameter ratio.
advancing blade In rotary-winged aircraft in translational
flight, any blade moving forward against relative
wind. Each blade advances through 180° of its travel,
normally from dead-astern to dead-ahead.
ADVCAP Advanced capability.
advection Generally, transfer by horizontal motion,
particularly of heat in lower atmosphere. On gross scale,
carries heat from low to high latitudes.
advection fog Fog, generally widespread, caused by
horizontal movement of humid air mass over cold (below
dew point) land or sea.
Advent Adaptive versatile engine technology (USAF).
adversary aircraft Fighter specially purchased and
configured to act role of enemy in dissimilar air-combat
training.
adverse rudder Inputs rolling moment opposite to that
commanded by lateral-control system.
adverse sideslip Sideslip resulting from kinematic
coupling.
adverse yaw Negative yawing moment due to roll at high
C L , problem with sailplanes.
Adviser Airborne dual-channel variable-input severe
envrionment recorder (RCA).
17