1Dk4eXg

air transportation oversight system
airborne, whose equipment is all adapted for air movement.
air transportation oversight system Method of checking
air-carrier safety procedures and programmes (FAA).
air transport operation BS.185 1951: ‘The carriage of
passengers or goods for hire or reward’; this eliminates all
military air transport, business flying and several other
classes of ***.
air trooping Non-tactical air movement of personnel.
air-tube oil cooler Oil cooler in which air passes through
tubes surrounded by oil.
air turnback 1 Point at which mission already airborne
is abandoned, for any reason.
2 Specif., point at which non-Etops aircraft has to
abandon planned flight.
air umbrella Massive friendly air support over surface
operation or other air activity at lower level.
air vane 1 Small fin carried on pivoted arm to respond
to local changes in incident airflow; arm usually drives
potentiometer pick-off sending signal of angle of attack or
yaw.
2 Powered surface to control trajectory of ballistic
vehicle in atmosphere (see jet vane).
air vector In DR navigation, Hdg. and TAS (air plot).
air volume In aerostat, volume of air displaced by solid
body having same size and shape as envelope or outer
cover. Volume used in airship aerodynamics.
air ward system Aircraft used for surveillance, fisheries
or customs patrol, police duties, reconnaissance and
similar tasks.
airway BS.185, 1951: ‘An air route provided with
ground organisation’. Most civil air routes are flown
along ICAO IFR airways, typically 10 nm wide with
centreline defined by point-source radio navaids spaced
sufficiently close for inherent accuracy to be less than half
width of airway at midpoint. Each airway has form of
corridor, of rectangular cross-section well above Earth.
Airspace within is controlled, and traffic separated by
being assigned different levels and from ATC having
position reports and accurate forecasts of future position
(typically, by ETA at next reporting point). In general,
made up of a series of route segments each linking two
waypoints.
airway beacon Light beacon located on or near airway
(see NDB).
airways-equipped Equipped with functioning statutory
avionics and instruments (eg, two pressure altimeters) to
satisfy ICAO requirements for flight in controlled
airspace.
airways flying Constrained to dogleg along centrelines
of airways instead of flying direct to destination.
airway traffic control Civil air traffic control formerly
exercised on ‘airways’ basis; today no separate system for
designated airways.
Air Wheel Wheel/tyre combination introduced by
Goodyear after World War 1, characterised by small
wheel and fat tyre to absorb landing shocks.
air work In flying instruction, student air time as distinct
from classroom time.
airwork Today usually one word, to explore aircraft’s
handling or perform tests or demonstrations in flight.
airworthiness Fitness for flight operations, in all
possible environments and foreseeable circumstances for
which aircraft or device has been designed.
AIZ
airworthiness circular A message broadcast by the certifying
authority giving new information, usually on a
specific type of aircraft.
Airworthiness Directive, AD Message from national
certifying authority requiring [often immediate] mandatory
inspection and/or modification.
Airworthiness Notice, ND Not mandatory, but strong
recommendation or advice.
airworthy Complying with all regulations and requirements
of national certifying authority.
airybuzzer Aeroplane (colloq.).
AIS 1 Aeronautical Information Service [AG adds
automation group] (ICAO, and UK unit at LHR
[Heathrow] which published AICs).
2 Advanced [or airborne] instrumentation subsystem
(ACMR).
3 Avionics intermediate shop.
4 Academic instructor school.
5 Aircraft indicated (air) speed (IAS is preferred).
6 Automated information system.
7 Airport information service.
8 Automatic indentification system.
A12G Department of Air Intelligence, Technical [MoD,
RAF] (UK).
AI 2 S Advanced IR imaging seeker.
AISA 1 Ada instruction set architecture.
2 Aerospace Industry Subcontractors Association
[office, Montreal] (Canada).
AISAP AIS(1) Automation panel.
AISD Airlift Information Systems Division (Scott
AFB).
AISFS Avionics integration support facilities.
AISIS Airborne integrated Sigint system.
aisle Longitudinal walkway between seats of passenger
aircraft.
aisle height Headroom along aisle.
aisle stand Pilot’s instrument panel mounted on pillar in
all-glazed nose [as in B–29].
AIT 1 Alliance Internationale de Tourisme (Int.).
2 Assembly, integration and test.
3 Airborne integrated terminal [G adds group].
4 Atmospheric intercept [or] testbed [or technology].
5 Automated information transfer.
6 Avanced intelligence tape.
AITAL, Aital Asociación Internacional de Transportes
Aéreos Latinoamericanos (Int.).
AITFA Association des Ingénieurs et Techniciens
Français des Aéroglisseurs (hovercraft) (F).
AITS Advanced information technology services [JPO
adds Joint Program Office] (DoD).
AIU 1 Analog, or aircraft, or armament, or avionics,
interface unit.
2 Astro-inertial unit.
3 Airborne-installation unit.
4 Auto-ignition unit.
5 Audio integration unit.
AIV 1 Accumulator isolation [or isolator] valve.
2 Aviation-impact variables (program).
AIVSC Aviation Industry Vocational Standards
Council (UK).
AIWS Advanced interdiction weapon system, a standoff
ASM.
AIX Advanced interactive executive.
AIZ Aerodrome/airfield information zone.
38