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Passive Underwater Fire Control Feasibility System (or Study) (PUFFS) is a passive sonar system for submarines. It was designated AN/BQG-4 and was primarily installed on United States Navy conventional submarines built in the 1950s beginning with the Tang class , and also those converted to GUPPY III or otherwise modernized in the 1960s.
USS Greenfish after GUPPY III modernization. Visible on deck are the three distinctive shark-fin domes of the PUFFS sonar. The Greater Underwater Propulsion Power Program (GUPPY) was initiated by the United States Navy after World War II to improve the submerged speed, maneuverability, and endurance of its submarines. (The "Y" in the acronym ...
In 1967, Tang, Wahoo, Gudgeon, and Harder received an additional 15-foot (4.6 m) section (five additional frames between frames 42 and 43) to accommodate the BQG-4 Passive Underwater Fire Control Feasibility System (PUFFS) passive ranging sonar installation, with three tall domes added topside, and additional fire control equipment that enabled ...
She had a 15 ft (4.6 m) hull extension added forward of the control room, a plastic sail and the BQG-4 PUFFS passive ranging sonar, which included the three sharkfin sensors on her deck. [5] Clamagore finished her GUPPY III conversion in February 1963, and was transferred to Submarine Squadron 2 (SUBRON2) in Groton, Connecticut. [citation needed]
A 15-foot (5 m) hull section was installed in addition to a large amount of new electronic, fire control, and sonar equipment, making Volador one of the most modern diesel-electric submarines in the Fleet. After trials in Puget Sound, she returned to San Diego in April 1963 to take part in local operations.
BQG-4 passive attack sonar [4] USS Pickerel (SS-524) , a Tench -class submarine , was the second ship of the United States Navy to be named for a young or small pike . Construction and commissioning
In 1962, Cobbler became one of only nine boats to undergo the GUPPY III conversion. She had a 15-foot (4.6 m) hull extension added forward of the control room, a plastic sail and the BQG-4 PUFFS passive ranging sonar, which included the three sharkfin sensors on her deck.
USS Tang (SS/AGSS-563), the lead ship of her class, was the second ship of the United States Navy to be named for the tang.. She was the first American submarine designed (as opposed to modified) under the Greater Underwater Propulsion Power Program (GUPPY) for underwater performance rather than surfaced speed and handling.