OVERVIEW: The BAT‑1 is an alleged towed acoustic countermeasure system intended to defend surface ships against torpedoes by emitting deceptive acoustic signals. It is often associated in secondary references with Cold War–era Soviet cruisers.

DETAILS: The BAT‑1 is a Soviet/Russian towed torpedo decoy. It have been fitted on ships of the Project 1134B Kara-class (NATO: Berkut‑B), serving as part of their anti-submarine warfare suite. Use passive acoustic decoying to draw off wire-guided or homing torpedoes, but no open-source data confirms whether it provided any active jamming or powered maneuverability.

FUNCTION: The BAT‑1 would have functioned by being streamed behind the ship, mimicking propulsion or acoustic signatures to seduce incoming torpedoes. No confirmed data is available regarding whether it worked autonomously or was controlled by onboard systems.

NOTE:
IOC: Unknown
Operators: Soviet Union
Platforms: Project 1134B Kara-class (Berkut‑B) ?

SOURCE:
No official sources.