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IROC
IROC International Requirements Oversight Council
(US).
iron 1 Metallic element, Fe, density about 7.86, MPt
1,539°C.
2 All magnetic parts of compass, aircraft etc, of whatever
material.
3 Colloquially, aircraft (especially warbird).
iron ball General term for a common magnetic RAM,
powders of ferrites or carbonyl iron embedded in flexible
matrix or sprayed on, see iron paint.
iron bird Ground rig to test major aircraft system[s].
iron bomb Simple free-fall bomb (colloq.).
iron compass Railway used as navaid (US colloq.).
ironless Constructed of non-magnetic materials.
iron mike Autopilot (colloq., obs.).
iron paint RAM (2) sprayed-on coating comprising
ferrite magnetic balls of microscopic size contained in
epoxy binder. Multiple layers give desired thickness.
iron reserve Fuel for taxiing at destination.
irons See eating irons.
Irotis, IR-OTIS IR optronic tracking and identification
system.
IRP 1 Intermediate rated power.
2 Interphone receptacle panel.
3 Integrated refuelling panel.
4 Intruder role player.
IRPG IR plume generator.
IRR 1 Integral rocket/ramjet.
2 Infra-red radiation, or radiometer.
3 Installation readiness review.
IRRCA Integrated real-time info into the cockpit/
real-time info out of the cockpit for combat aircraft.
irreversible control Position of output governed only by
input (thus, * flight control is unaffected by air load on
surface).
irreversible screwjack Thread chosen so that linear
position governed solely by rotation, not by operating
load.
IRROLA Inflatable radar-reflective optical location
aid.
irrotational flow Individual elements or parcels do not
rotate about own axes.
IRRS IR reconnaissance system.
IRS 1 Inertial reference system, or set.
2 Improved radar simulator.
3 Indian remote satellite.
4 IR signature, or spectrograph.
5 Internal Revenue Service (US).
6 Interface requirements specification.
IR seeker See IR detector.
IR signature Complete plot of IR emissions from given
source or vehicle, usually in form of intensity plotted
against wavelength.
IRSM IR surveillance measures.
IR telescope camera system Hand-held, on long wand,
for inspection [or search for explosives or drugs] in dark
places.
IRSP Instrumentation radar support programme.
IRST IR search and track; S adds system.
IRT 1 Instrument-rating test.
2 Incident, or immediate, response team.
IRTH IR terminal homing.
IRTS 1 Initial radar training simulator.
2 IR threat simulator.
ISAT
3 IR track and scan.
IRTT IR tow target.
IRU Inertial reference unit.
IR/UV Infra-red [and] ultra-violet.
IRV 1 Infra-red vision.
2 Inward[s] relief valve.
IRVAT Infra-red video automatic tracking.
Irvin Trade name of Irving Air Chute (parachutes).
Irving flap Split flap pivoted to links near mid-chord and
lowered by actuator thrust on the leading edge.
Irvin suit Two-piece flying suit of fur-lined leather, from
c1928 (UK).
IRVR Instrumented runway visual range.
IRWR IR warning receiver.
IS 1 Institut für Segelforschung (G).
2 Implementation staff.
ISA 1 International standard atmosphere.
2 International Stewardess, Hostess and Airliner
Association, now ISAA (2).
3 Instrument Society of America [office, Pittsburgh,
PA] (US)..
4 Instruction set architecture.
5 Inter-service agencies.
6 Industry standard architecture.
7 Integrated servoactuator.
ISA+21 International Society of Women Airline Pilots
[ISA, international social affiliation].
ISAA 1 Israel Society of Aeronautics & Astronautics
[61028 Tel Aviv] (Israel).
2 International Steward/ess & Airliner Association.
ISA/AMPE Inter-service agencies/automated message
processing exchange.
ISABE International Society for Air-Breathing
Engines.
ISAC Institute of Space and Aeronautical Science (J).
ISADS 1 Integrated strapdown air-data system.
2 Integrated sensor[s] and display system.
ISAE International Society of Airbreathing Engineers.
ISAF International Security Assistance Force [NATOled].
IsAF Israeli air force [UK usage].
ISAG International Simulation Advisory Group.
ISAHRS Improved standard AHRS.
ISAL Inverse synthetic-aperture lidar (or ladar).
isallobar Line joining all places where, over given period
(typically 3 h), barometric pressure at surface changes by
same amount.
ISAMP International Society of Aviation Maintenance
Professionals (1996).
ISAN Integrity of satellite navigation (G, research
programme).
IS&S Integrated systems and solutions, merger of
command and control intelligence and data fusion
(DoD).
ISAR 1 Inverse synthetic-aperture radar.
2 Integrated, or intelligence, surveillance and reconnaissance;
C adds cell.
ISAS 1 Institute of Space and Aeronautical Science
(India).
2 Institute of Space and Astronautical Science (J).
ISASI International Society of Air Safety Investigators
[office, Sterling VA 20164-4421] (Int.).
ISA-SL ISA (1) at sea level.
ISAT 1 Integrated site acceptance test.
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