The AN/ALQ-99 is an airborne electronic warfare system, found on EA-6B and EA-18G military aircraft.
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The ALQ-99 is an airborne integrated jamming system designed and manufactured by EDO Corporation. Receiver equipment and antennas are mounted in a fin-tip pod while jamming transmitters and exciter equipment are located in under-wing pods. The system is capable of intercepting, automatically processing and jamming received radio frequency signals.[1] The system receivers can also be used to detect, identify and direction find those signals, providing signals intelligence (SIGINT) either automatically or manually.[2]
The AN/ALQ-99 is currently mounted on EA-6B Prowler and EA-18G Growler aircraft of the U.S. Navy and, in the case of the EA-6B Prowler only, U.S. Marine Corps.
It has been previously mounted on EF-111A Raven aircraft of the U.S. Air Force. These aircraft were fully retired from service by May 1998.
The EF-111A Ravens were initially stationed at Mountain Home AFB, Idaho using modified AGS Yellow Squadron's F-111A Aardvarks.
The AN/ALQ-99 has a maximum power output of 10.8 kW in its older versions and of 6.8 kW in its newer versions.[3] It uses a ram air turbine to supply its own power.
The AN/ALQ-99 has been used during the Vietnam War (1972-1973), 1986 American attacks in Libya, 1991 Gulf War, Operation Northern Watch (1992–2003), Operation Southern Watch (1997–2003), 1999 Balkans War, 2003 Second Gulf War, and 2011 Operation Odyssey Dawn. The poor reliability of the ALQ-99 and frequent failures of the Built In self Test (BIT) have caused crew to fly missions with real faults; the ALQ-99 also interferes with the aircraft's AESA radar, reduces the top speed of the aircraft and imposes a high workload on the two man crew.[4]