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AN/BQG-4 Puffs

Country of Origin: USA


The AN/BQG-4 Passive Underwater Fire-control Feasibility System (PUFFS) was a submarine sonar for torpedo fire control. It consisted of three fin-like sonar domes on the upper deck. It was fitted in several older classes of U.S. submarines, with the last (DARTER/SS-576) having been retired in 1989.

The PUFFS concept provided for high-accuracy passive ranging through the correlation of signals received by multiple arrays fitted to the submarine.

Later submarines had the MicroPUFFS...

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