OVERVIEW: The UCM-T130 Loki is a launched expendable acoustic torpedo decoy developed to protect surface ships from active and passive homing torpedoes. It is compatible with NATO-standard 130 mm launchers such as the Mk 36 SRBOC and DL-12T.

DETAILS: Developed by QinetiQ in the late 2000s for the Royal Norwegian Navy, the UCM-T130 Loki is designed to deploy rapidly in response to underwater threats. Upon water entry, the decoy activates and emits programmable acoustic signals that replicate ship signatures or generate noise to mask the actual vessel. It weighs approximately 13 kg, measures 1.8 meters in length, and is designed to fit in 130 mm launch tubes. Loki is launched from existing countermeasure systems such as the Mk 36 SRBOC or the Norwegian DL-12T, without requiring platform modifications. The decoy can be reprogrammed for specific acoustic profiles depending on threat environment, offering flexibility against evolving torpedo technologies.

FONCTION:
Detect torpedo launch or approach via onboard sensors.
Launch UCM-T130 Loki from a 130 mm decoy launcher (e.g., Mk 36 SRBOC).
Emit deceptive acoustic signatures or jamming noise to lure torpedoes away from the ship.

SOURCE:
Royal Norwegian Navy Procurement Briefs ; QinetiQ Maritime Systems Datasheet ; Jane’s Underwater Warfare Systems ; NATO Naval Armaments Group Reports ; Federation of American Scientists (https://www.fas.org/man/dod-101/sys/ship/weaps/index.html)