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Aresa
3 Aerial regional scale environmental survey.
4 Advanced route evaluation system.
5 Affordable responsive spacelift [Space Command]
(USAF).
Aresa Association des Radio-Electroniciens de la
Sécurité Aérienne (F).
Aresti International procedures devised by José * for
governing competitive aerobatics to set formula stipulating
competing aircraft, set and free manoeuvres,
[rendered graphically], judging and marking, now
replaced by Aerobatic Catalogue.
ARF 1 Air Reserve Forces; suffix PDS adds personnel
data systems (US).
2 Airborne relay facility, or facilities.
3 Air Reconnaissance Facility.
4 Airlink risk factor.
ARFA, Arfa Allied Radio-Frequency Agency (NATO).
Arfab Allied radio frequency allocation board (NATO).
ARFAC Australian Royal Federation of Aero Clubs.
ARFC Aerospace Reconstruction Finance Corporation
(US Government).
ARFF Airfield [or airport or aircraft] rescue and firefighting
(vehicle).
AR5 NBC hood and respirator (UK, RAF, RN).
ARFOR Area forecast (Int. Met. Figure Code, ICAO).
ARG 1 Amphibious Ready Group, with air assets
(USMC).
2 Aeronautics Research Group (EREA).
3 Airfield Research Group [1977–; Thetford IP24 2AB]
(UK).
ARGMA Army Rocket and Guided Missile Agency
(USA, now Miradcom).
argon Most widespread inert gas in atmosphere; typical
sea-level about 0.934%. Used in some fluorescent lamps
and filament bulbs and as constituent of breathing
mixtures, but most important in steel and titanium
production and to prevent oxidation in welding.
Argos National space-based navigation system (F).
ARGS Anti-range-gate stealing.
argument Angle or arc (astronomy). Thus * of perigee,
angular arc traversed from ascendng node to perigee as
seen by observer at near focus, measured in orbital plane
in satellite’s direction of travel.
Argus Advanced remote ground unattended sensor.
ARH 1 Active radar homing.
2 Anti-radar homing.
3 Anti-radiation homing.
4 Armed reconnaissance helicopter.
ARHMP Accelrated radiation-hardened microelectronics
production, or protection.
ARI 1 Aileron/rudder interconnect.
2 Airborne, or aircraft, radio installation (UK).
3 Airpower Research Institute (US).
4 Aviation restructure initiative.
5 Additional requirement[s] for import.
6 Azimuth/range indicator.
7 Aviation Research Institute (USA, not connected
with 3).
ARIA Apollo (later Advanced) range instrumentation
aircraft.
ARIARDA, Ariarda
Aviation R&D Activity (USA).
ARIC Airborne radio and intercom control.
Army Research Institution
armature reaction
Aries, ARIES 1 Airborne research integrated experimental
system [flight instrumentation] (NASA Langley).
2 Airborne recorder for IR and EO sensors.
3 Aeronautical reporting and information-exchange
system.
4 Airborne reconnaissance integrated electronics suite.
ARINC, Arinc Aeronautical Radio Inc, with subsidiary
Arinc Research. Non-profit research organisation
responsible for aeronautical radio standards and widespread
ground aids, esp. communications, across Pacific
and in other regions. The authority publishes numerous
specifications for avionics, notably:
400 Basic design guidelines.
404A Specifications for packaging.
429 Initial standard digital data highway [latest
version 42913]. See 600.
500 baseline specifications for analog equipment.
578 Standards for VOR.
600 Standards of basic technologies and packaging.
629 Standards for 2 Mbit/s databuses.
700 Specifications for digital equipment.
708 Standards for weather radar.
755 Standards for multimode receivers.
Arinc communications and reporting system VHF link
between aircraft systems and ground-based computer,
plus messages generated by menu-driven CDU.
ARIP Air refuelling initial point.
ARIS Anti-resonance isolation system.
arithmetic unit Heart of typical digital computer;
portion of central processor where arithmetical and logic
functions are performed; invariably contains accumulator(s),
shift and sequencing circuitry and various
registers.
ARJA Association Suisse Romande des Journalistes
Aéro & Astronautique (Switz.).
ARJS Airborne radar jamming system.
ARL 1 Aeronautical Research Laboratories
(Australia).
2 Aerospace research laboratories (US, OAR).
3 Air Resources Laboratory (NOAA).
AR-L Air [or airborne] reconnaissance-low.
Arlat Association of Registered and Licensed
Aeronautical Technicians [Pretoria, South Africa].
ARM 1 Anti-radiation missile.
2 Atmospheric radiation measurement (US Dept of
Energy).
3 Advanced radar mode[s].
arm 1 To prepare explosive or pyrotechnic device so
that it will operate when triggered.
2 Horizontal distance from aircraft or missile reference
datum to c.g. of particular part of it.
3 See tail arm.
Armak Aeronautical certification authority (R).
armament Carried on combat aircraft specifically to
cause injury, by direct action, to hostile forces. Excludes
radars, laser rangers (unless they cause optical injury by
intent), illumination devices, detection or tracking
devices, defoliating sprays, smokescreen generators and,
unless filled with napalm, drop tanks.
Armat Anti-radar missile, Matra.
armature reaction In d.c. generator or alternator, distortion
of main field by armature current, factor
60