Permit-class submarine

USS Thresher (SSN-593)
Class overview
Builders
Operators United States Navy
Preceded bySkipjack class
Succeeded bySturgeon class
Built1958–1967
In commission1961–1996
Completed14
Lost1
Retired13
General characteristics
TypeNuclear submarine
Displacement
  • 3,750 long tons (3,810 t) surfaced
  • 4,300 long tons (4,369 t) submerged[1]
Length278 ft 5 in (84.86 m)
Beam31 ft 7 in (9.63 m)
Draft25 ft 2 in (7.67 m)
Propulsion
  • 1 S5W PWR
  • 2 steam turbines, 15,000 shp (11 MW)
  • 1 shaft
Speed
  • 15 knots (28 km/h; 17 mph) surfaced
  • 28 knots (52 km/h; 32 mph) submerged
RangeUnlimited, except by food supplies
Test depth1,300 ft (400 m)
Complement112
Sensors and
processing systems
Electronic warfare
& decoys
ESM
Armament

The Permit-class submarine (known as the Thresher class until the lead boat USS Thresher was lost) was a class of nuclear-powered fast attack submarines (hull classification symbol SSN) in service with the United States Navy from the early 1960s until 1996. They were a significant improvement on the Skipjack class, with greatly improved sonar, diving depth, and silencing.[1] They were the forerunners of all subsequent US Navy SSN designs. They served from the 1960s through to the early 1990s, when they were decommissioned due to age.[2] They were followed by the Sturgeon and Los Angeles classes.

The Thresher class was one of several results from a study commissioned in 1956 by Chief of Naval Operations (CNO) Admiral Arleigh Burke. In "Project Nobska", the Committee on Undersea Warfare of the United States National Academy of Sciences, collaborating with numerous other agencies, considered the lessons of submarine warfare and anti-submarine warfare learned from various prototypes and experimental platforms. The design was managed under project SCB 188.[3]

  1. ^ a b Friedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 141–46, 243. ISBN 1-55750-260-9.
  2. ^ Friedman, pp. 235–36
  3. ^ Friedman, p. 143