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AJ
AJ Anti-jam.
A j Nozzle throat area [occasionally AJ, often confusingly
called jetpipe area].
AJA Aft jamming antenna.
Ajacs, AJACS Advanced Joint Air Combat System
[stealthy transport] (USAF).
Ajax unit Device for providing artificial feel in pitching
plane as function of stick displacement, altitude and
airspeed.
AJB Audio junction box.
AJCN Adaptive, later advanced, joint C4ISR node.
AJE Augmented-jet ejector; VL adds vertical lift.
AJJ Adaptive-jungle jammer, sophisticated ECM selfadapting
to variable enemy transmissions.
AJM Anti-jam modem.
AJPAE, Ajpae Association des Journalistes
Professionnels de l’Aéronautique et de l’Espace [F-75116
Paris] (F).
AJPO Ada Joint Program Office.
AJPS Afeps journal processing system.
AJS Attack, Jakt, Spaning, attack, fighter, recon
(Sweden).
AJSP Association des Journalistes Scientifques de la
Presse d’Information [F-75008 Paris] (F).
AJT Advanced jet trainer.
AK Nitrogen tetroxide; suffix number gives percentage
(Russia).
A/K Aluminium/Kevlar (armour).
AKU Avionic[s] keyboard unit.
AL 1 Approch and landing chart (FAA).
2 Spec prefixes for methanol or water/methanol (AL-24
piston engines, AL-28 gas turbines).
Al Aluminium [US aluminum].
A/L 1 Approach/land, operative mode for airborne
system.
2 Airline.
3 Autoland.
ALA 1 Alighting area (ICAO, marine aircraft).
2 Asociación de Lineas Aéreas (Spain).
3 Approach and landing accident[s].
ALAA Aviation Légère de l’Armée de l’Air (F).
ALADC Australian Light Aircraft Development
Council.
Aladdin Algorithm adaptive and diminished dimension.
ALAE Association of Licensed Aircraft Engineers
[1981–, office Bagshot, Surrey GU19 5AQ] (UK).
ALAFS Advanced lightweight aircraft fuselage structure
[or system].
ALAM Advanced land-attack missile.
ALAR Aircraft [or approach and] landing accident
reduction.
Alarm 1 Air-launched anti-radiation missile.
2 Automatic light-aircraft readiness monitor.
Alarms Airborne laser-radar mine sensor.
ALARR Air-launched, air-recoverable rocket.
ALAT Aviation Légère de l’Armée de Terre (F).
Alats Advanced laser targeting system.
ALAVIS Advanced low-altitude IR reconnaissance
system.
ALB 1 Air/land battle.
2 Aircraft lifting bag, for recovery after belly landing,
etc.
albedo 1 Percentage of EM radiation falling on unpolished
surface that is reflected from it, esp. percentage
Alerfa
of solar radiation (particularly in visible, or other specified,
range) reflected from Moon or Earth.
2 Radiation thus reflected.
ALBM 1 Air-launched ballistic missile.
2 Air/land battle management (Lockheed).
ALBT Air-launched ballistic target.
ALC 1 Air Logistics Command [now Air Mobility
Command] (USAF).
2 Air Logistics Center.
3 Automatic level, or levelling, control (radio).
4 Air logic control, for automated systems.
5 Ambient light[ing] control.
ALCA Advanced light combat aircraft.
ALCAC Air Lines Communications Administrative
Council (US).
Alcam Air-launched conventional attack missile.
ALCC 1 Airborne launch control centre.
2 Airlift control centre.
ALCE Airlift control element (MAC).
Alclad Trade name (Alcoa) of high-strength light alloys
(usually sheet) coated with corrosion-resistant highpurity
aluminium. Originally developed for marine
aircraft.
ALCM Air-launched cruise missile.
alcohol Large family of hydrocarbons containing
hydroxl groups, esp. methyl. alcohol CH 3 OH (toxic) and
ethyl alcohol (ethanol, C 2 H 5 OH, potable), both used as
fuels, anti-detonants and rocket propellants.
Alcoseal Range of film-forming foam compounds for
extinguishing fires involving water-miscible solvents; *
VSA has vapour-suppressing additive.
ALCS 1 Active lift control system, to reduce peak wing
stresses in gusts.
2 Airborne launch-control system.
Alcusing Light alloy (aluminium, copper, silicon).
ALD 1 Arbitrary landing distance, standard comparison
distance along runway, from touchdown to stop,
using specified landing technique; used in determining
field-length requirements.
2 Available landing distance.
3 JETDS code: piloted aircraft, countermeasures,
combination of purposes.
4 Air-launched demonstrator [missile].
ALDCS Active-lift distribution control system.
Alder Advanced laser devices and effects research.
Aldis 1 Patented hand signalling lamp with optical
sight, trigger switch (kept on throughout use) and second
trigger to tilt mirror to deflect light beam intermittently
down to target.
2 Airport land-dues information system.
ALDP Airborne laser designator pod.
ALDS Airborne laser defensive system.
ALE 1 Aviazione Leggera Esercito (Italian army
aviation).
2 Automatic [radio] link establishment.
ALEA 1 Airborne Law Enforcement Association
[office, Tulsa, OK74101] (US).
2 Air Line Employees Association, International [office
Chicago] (Int.).
Aleastrasyl Refractory material for re-entry heat
shields, a resin-impregnated silica fabric.
ALEK See anchor-line extension kit.
Alerfa Alert phase of SAR operation.
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