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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 ...
Probably the most important innovation of the Tangs, and their primary advantage over contemporary GUPPY conversions, was an increase in test depth from 400 ft (120 m) to 700 ft (210 m), achieved with the same High Tensile Steel (HTS; 42,000 psi (290 MPa) yield strength) as the Balao and Tench classes. This allowed the class to take advantage ...
GUPPY I conversion 1947, GUPPY II conversion 1951 SS-487 Remora: GUPPY II conversion 1947, GUPPY III conversion 1962, transferred to Greece on 29 October 1973. SS-488 Sarda: SS-489 Spinax: Converted to SSR in 1946 SS-490 Volador: Last fleet submarine to be launched on 17 Jan 1946. GUPPY II completion 1948, GUPPY III conversion 1963.
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]
An elderly Nevada man looking for love was allegedly drugged and pushed across the US border into Mexico in a wheelchair by a “sinister” scammer before being found dead in a Mexico City hotel ...
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