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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.[1] 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.[2]

It is made by Northrop Grumman Electronic Systems.

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),[3]
  • launchers for infrared and radar countermeasures such as the AN/ALE-47