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LIU
LIU LAN interface unit.
LIV Left interconnect valve.
l iv Root chord of vertical tail.
LIVE, Live Liquid inertial vibration eliminator.
live drop Release from aircraft of operative device, eg
missile with propulsion and guidance and possibly
warhead, as distinct from inert equivalent.
live engine Operative engine(s) in aircraft with one or
more real or simulated failures.
live flight deck Subject to motion at sea, rather than in
port (aircraft carrier).
live mail Real air mail, as distinct from dummy loads.
live nut Driven by rotary power unit along thread to give
[usually irreversible] linear output.
livre[s] Pounds (lb) avoirdupois (F).
lizards Short lengths of rope, often with pulleyblock on
free end, for ground-handling kite- or barrage balloon.
LJAO London Joint Area Organization.
LJDAM Laser joint direct attack munition.
LJS Laser jamming system.
LK Product support (G).
LKLY Likely.
LKN Last known position [rarely, LKP].
LKR Low-kiloton range.
LKS Lakes.
LKV LuchtvaartKundige Vereeniging (SA).
LL 1 Low-level.
2 Limit load,
3 Flying laboratory, ie research aircraft (USSR, R).
4 Low-lead [fuel].
5 Long lead [time].
6 Legislative liaison (USAF).
L L Loudness level (Stevens) in phons.
L-L Line to line (AC voltage).
L/L Latitude and longitude.
LLAD Low-level air defence; S adds system.
Llanbedr Airfield on Welsh coast serving Aberporth
with targets (RAE, now Qinetiq).
LLAPI Low-level air-picture, or air-defence picture,
interface.
LLC 1 Lift-lift/cruise.
2 Logic link control.
LLDF Low-level discomfort factor.
LLDIN Long-lead-in light system, can cross major city.
LLF 1 Low-level fan of reconnaissance cameras.
2 Long-lead funding.
LLGB Launch-and-leave guided bomb.
LLH Light liaison helicopter.
LLHK Low-level height keeper.
LLLGB Low-level laser-guided bomb.
LLLTV Low-light-level television.
LLM 1 Long-lead [time] material.
2 Launcher loading module.
LLMS Liquid-level measurement system.
LLNL Lawrence Livermore National Laboratory,
California.
LLP 1 Low-level parachute.
2 Left lower plug [all similar entries = avionics boxes].
3 Limited-liability partnership.
4 Life-limited, or limited-life, part[s].
LLS Lightning location system.
LLT Long lead time.
LLTOW Landing limiting (or limited) takeoff weight.
LLTV Low-light television.
LMSS
LLV Lower limit of video (HUD).
LLW Less-lethal weapon[s].
LLWAS Low-level windshear alert system (sometimes
LLWSAS).
LLWC Low-level weather chart.
LLWD Low-level weapons delivery.
LLWS Low-level windshear.
LLZ Localizer.
LM 1 Lunar, or landing, module.
2 Last-minute (cargo).
3 Laser machining.
4 Little movement.
5 Locator, middle.
6 Laser module.
7 Line maintenance.
8 Linear motor.
9 Loitoring munition[s].
L/M 1 Ratio of direct labour to material cost.
2 List of materials.
lm Lumen.
LMAE Lunar module ascent engine.
LMAL Langley Memorial Aeronautical Laboratory
(NACA), became NASA LaRC.
LMAR Lightweight multiband airborne radar, or
radio.
LMARS London Military Area Radar Service.
L max Peak [maximum A-weighted] sound level.
LMC 1 A last-minute check-in.
2 Life-monitoring computer.
3 Least material condition.
LMD 1 Laboratoire Météorologique Dynamique (F).
2 Lithium manganese dioxide.
LMDE Lunar module descent engine.
LME 1 Line maintenance engineer.
2 Link management entity.
LMF 1 Liquid methane (or methanol) fuel.
2 Lacking moral fibre (RAF, 1939–45).
L/MF Low/medium frequency.
LMG 1 Liquid methane gas.
2 Light machine gun.
LMI 1 Logical management interface.
2 Logistics management information.
LMIT Laser materials interaction testing.
LML Lightweight multiple launcher.
LMLF Limit manoeuvre load factor.
LM/LO Liquid methane, liquid oxygen.
LMM 1 Compass locator at middle marker.
2 Linear multistep method.
LMN Local Mach number.
LMO Lean-mixture octane [rating].
LMP 1 Lunar module pilot.
2 Left middle plug.
3 Linear-motor profiler [machine tool].
4 Load maintenance panel.
LMRS London Military Radar Services.
LMS 1 Least mean square.
2 Land mobile service.
3 Local maintenance system (navaid).
4 Light monitor and switch.
5 Learning management system [on-line].
6 Line-maintenance service[s].
LMSJ Lightweight modular support jammer.
LMSS 1 Light mission support system (RAF).
2 Land mobile satellite service.
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