ALARM

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Tornado GR4 carrying three ALARMs
Tornado GR4 carrying three ALARMs

ALARM (Air Launched Anti-Radiation Missile) is a British anti-radiation missile designed primarily to destroy enemy radars for the purpose of Suppression of Enemy Air Defence (SEAD). It is similar in this role to the American AGM-88 HARM missile but not in its method of operation.


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ALARM is a fire-and-forget system, with an added loiter capability.

In loiter mode, ALARM will, when launched, climb to an altitude of 13 km. If the target radar shuts down, the missile will deploy a parachute and descend slowly until the radar lights up. The missile will then fire a secondary motor to attack the target.

It is used by the RAF and the Royal Saudi Air Force.[1]


ALARM has been used in these conflicts:

  • Length: 4.24 m
  • Diameter: 23 cm
  • Wing Span: 73 cm
  • Launch Weight: 268 kg
  • Unit Cost: undisclosed
  • Date Deployed: 1990
  • User: UK :
    • Tornado GR4, although only IX Squadron and 31 Squadron specialize in the role.
    • Tornado F3 - fitted in time for 2003 Gulf War - receiving designation Tornado EF3
    • Weapon has been "fit checked" on other RAF aircraft, such as the Jaguar. Due to its relatively large weight it is not suited to entire RAF fleet.
    • Also expected to be usable on the Eurofighter Typhoon


British guided missiles

Air-to-air

ASRAAM | Fireflash | Firestreak | Red Top | Skyflash

Air-to-surface

ALARM | Brimstone | Martel (UK/France) | Sea Eagle | Sea Skua | Storm Shadow (UK/France)

Surface-to-air

Bloodhound | Blowpipe | Javelin | Rapier | Sea Cat | Sea Dart | Sea Slug | Sea Wolf | Starburst | Starstreak | Tigercat | Thunderbird

Surface-to-surface

Swingfire | Malkara (UK/Australia) | Vigilant

Strategic and tactical nuclear

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