USS Thresher (SSN-593)

USS Thresher (SSN-593) under way, 30 April 1961
History
United States
NameThresher
NamesakeThresher shark
Ordered15 January 1958
BuilderPortsmouth Naval Shipyard
Laid down28 May 1958
Launched9 July 1960
Commissioned3 August 1961
Stricken10 April 1963
MottoVis Tacita (Silent Strength)
FateLost with all hands during deep diving tests, 10 April 1963; 129 died
General characteristics
Class & typePermit-class submarine
Displacement3,540 short tons (3,210 t) light, 3,770 short tons (3,420 t) submerged
Length279 ft (85 m)
Beam32 ft (9.8 m)
Draft26 ft (7.9 m)
Propulsion1 Westinghouse S5W PWR, Westinghouse Geared Turbines 15,000 shp (11 MW)
Speed33 knots (61 km/h; 38 mph)
Complement16 officers, 96 enlisted
Armament4 × 21 in (530 mm) torpedo tubes amidships

USS Thresher (SSN-593) was the lead boat of her class of nuclear-powered attack submarines in the United States Navy. She was the U.S. Navy's second submarine to be named after the thresher shark.

On 10 April 1963, Thresher sank during deep-diving tests about 350 km (220 mi) east of Cape Cod, Massachusetts, killing all 129 crew and shipyard personnel aboard. Her loss was a watershed for the U.S. Navy, leading to the implementation of a rigorous submarine safety program known as SUBSAFE. The first nuclear submarine lost at sea, Thresher was also the third of four submarines lost with more than 100 people aboard, the others being the French Surcouf, sinking with 130 personnel in 1942, USS Argonaut, lost with 102 aboard in 1943, and Russian Kursk, which sank with 118 aboard in 2000.