AAR-54

Intended to detect surface-to-air and air-to-air missile threats by their ultraviolet exhaust signature, the AN/AAR-54 is a missile launch warning receiver for aircraft. While can be used on fixed-wing aircraft as well as helicopters and ground vehicles, its most common application is to special operations helicopters and low-flying transport aircraft such as the MC-130 COMBAT TALON.

It will warn the flight crew of the threat so they can take manual countermeasures, but also can link to:
 * directional infrared countermeasures devices (DIRCM)
 * AN/AAQ-24(V) NEMESIS (helicopter-oriented)
 * large infrared countermeasures devices (LIRCM) (i.e., for wide-body and similar aircraft),
 * launchers for infrared and radar countermeasures such as the AN/ALE-47

Users

 * Australia
 * Germany
 * Royal Netherlands Air Force
 * Portugal
 * United Kingdom
 * United States
 * United States Special Operations Command
 * United States Transportation Command
 * The technology is being considered for civilian use by the U.S. Department of Homeland Security, as part of a counter-MANPADS protection system for airliners.