1Dk4eXg

Atran
thus ATR, ½ATR, ¼ATR etc; broadly defined by
Arinc 404, has also been said to mean air-transport[able]
rack[ing].
2 Air Transport Rating.
3 Automatic, or aided, target recognition.
4 Airport terminal resources.
5 Air-traffic requirements.
6 Anti-transmit receive.
7 Analog tape recorder.
8 Advanced tactical radar.
9 Armed turn[a]round.
10 Attained turn-rate.
11 Advanced threat resolution, a baggage-screen workstation.
12 Automated time-recording.
Atran Automatic terrain recognition and navigation,
cruise-missile guidance, Goodyear from 1949.
ATRB Advanced Technology Review Board.
ATRC 1 Air transport, or traffic, regulation center
(US).
2 See next.
ATR/C Automatic, or aided, target recognition and
classification.
ATRD Active towed radar decoy.
Atrel Air-transportable reconnaissance exploitation
laboratory (RAF).
ATRH Advanced tandem-rotor helicopter.
Atrif Air Transportation Research International
Forum [office, Sterling, VA20164] (Int.).
ATRJ Advanced threat radar jammer.
ATRP Air-Transport Regulation Panel (ICAO).
ATS 1 Air Traffic Services, thus * route (ICAO).
2 Applications technology satellite, wide research
programme.
3 Suomen Avaruustutkimusseura Ry (Finnish astronautical
society).
4 Automatic throttle system.
5 Armament training station (UK, WW2).
6 Aircrew training system (USAF).
7 Automatic test system (or station) for LRU check
away from aircraft.
8 Aviation training ship (RN).
9 Air-turbine starter.
10 Acoustic tracking system.
11 Accelerator test stand [U adds upgrade].
12 Agile target system.
13 Auxiliary Territorial Service (UK WW2, became
WRAC).
14 Advanced tracking system (radar extractor/tracker).
15 Automated trajectory server.
16 Airborne telephony server.
ATSA 1 Aviation and Transportation Security Act
(US, 19 November 2001).
2 Airline and travel services architecture.
3 Air-Traffic Services Agency (Bulgaria).
4 Air traffic service assistant.
ATSAB Air Transportation Systems Advisory Board
[proposed] (FAA).
Atsaw, ATSAW Airborne traffic situational awareness.
ATSB 1 Air Transportation Stabilization Board
(FAA).
2 Australian Transport Safety Board [at Canberra,
ACT].
ATSC
1 Air Technical Service Command (USAAF).
attention-getter
2 Air Traffic Services Cell, or comunication
(FAA/DoD).
AT/SC Autothrottle/speed control.
ATSCC Air Traffic Service Command Center.
ATSD Air-traffic situation display.
ATSG Acoustic test signal generator.
ATSGF ATS(1) geographic filter.
ATSM ATS(1) message [P adds processor].
Atsocas Air-traffic services outside controlled airspace.
Atsora Air traffic service[s] outside regulated airspace.
Comprises RAS, RIS, FIS and non-radar procedural
services.
Atsos, ATSOS Air Traffic Safety Oversight Service
[monitors AT08] (FAA, 2004–).
ATSS Air Transport Security School (UK, RAF).
ATSSD Air Traffic Services Standards Department
(CAA, UK).
ATSU Air-traffic services unit.
ATSy Air Transport Security Section (RAF).
ATT 1 Automatic attitude hold (AFCS).
2 Advanced tactical [or theater] transport.
3 Advanced theater threat.
4 Automatic target tracking.
ATT Tail-on-tail aerodynamic influence coefficient.
attach To place temporarily in a military unit.
attached shockwave Caused by supersonic body having
leading edge or nose sufficiently sharp or pointed not to
cause shock to detach and move ahead of it. Critical
values of M at which shock will just remain attached; eg
for cone of 30° included angle shock will detach below
1.46; for 30° wedge M is 2.55 because wedge exerts larger
obstructing effect on airflow. In most supersonic aircraft
aim is to keep most shocks attached, especially at engine
inlets.
attack aircraft Combat aircraft, usually aeroplane but
sometimes helicopter, designed for attacking surface
targets of tactical nature; missions include CAS (3) and
interdiction.
attack, angle of Angle α between wing chord or other
reference axis and local undisturbed airflow direction.
There are several ways of measuring this crucial
parameter. One is absolute angle of attack. Another is ***
for infinite aspect ratio, which assumes two-dimensional
flow. Effective *** varies greatly with aspect ratio;
modern wings of low aspect ratio have no stall in conventional
sense even at α = 40°. Some authorities in UK cause
confusion by using ‘angle of incidence’, which already has
clear meaning unconnected with angle of incident airflow.
attack avionics Navigation and weapon-aiming systems,
often integrated into single ‘fit’ for particular attackaircraft
type.
ATTC 1 Automatic takeoff thrust control.
2 Aviation Technical Test Center (USA, Ft Rucker).
3 Aircraft Tactics Training Center (USAF).
attention-getter Prominently positioned caption in
cockpit, or esp. flight deck, triggered by onboard
malfunction or hazardous situation (eg potential mid-air
collision) immediately to flash bright amber or red. Less
strident caption, warning light or other visual and/or
aural circuit also triggered, enabling crew to identify cause
and, if possible, take remedial action. Where CWS is fitted
first task is to trigger ** while routing appropriate signal
to captioned warning panel or other more detailed information.
73