OVERVIEW: The Bottom Acoustic Narrow-Band Mine is a seabed-deployed naval mine equipped with acoustic sensors that detect specific narrow-band vessel frequencies. It uses advanced target discrimination to engage only pre-identified ship types, minimizing false triggers and maximizing strategic value.

DETAILS: Designed for selective targeting, this mine remains buried or seated on the seafloor and activates only upon detection of predefined acoustic signatures. Unlike broadband systems, it filters out background noise and non-target frequencies, responding solely to narrow-band patterns linked to specific propulsion or mechanical sources. This capability allows discrimination between merchant traffic and military vessels, enhancing tactical precision. Introduced in the 1970s by leading naval forces, these mines can be integrated with additional influence sensors such as magnetic and pressure modules for multi-criteria detonation. Their target selectivity also makes them more resistant to sweeping and decoying.

FUNCTION: Once deployed, the mine passively monitors underwater sound for narrow-band acoustic signals associated with targeted vessels. If the signature matches the programmed parameters, the fuze arms and initiates detonation beneath the target.

NOTE:
IOC: 1970s
Operators: United States, Soviet Union/Russia, China, United Kingdom
Platforms: Submarines, minelayers, fixed-wing aircraft, helicopters
Conflict used in: Cold War strategic minefields; no confirmed combat use

SOURCE: U.S. Navy Mine Warfare Manual ; Jane’s Underwater Warfare Systems ; Naval Weapons Systems Acoustic Mine Profile (NavWeaps) ; Federation of American Scientists (FAS): https://fas.org/man/dod-101/sys/sea/mine.htm