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Grayback-class submarine
Grayback preparing to launch a Regulus II missile, c. 1960
Grayback preparing to launch a Regulus II missile, c. 1960
Class overview
Name: Grayback
Operators:  United States Navy
Built: 1954–1958
In commission: 1958–1964, 1969–1984
Completed: 2
Retired: 1
Preserved: 1
General characteristics
Type: Submarine
Tonnage: Surfaced: 2712 tonnes (2670 tons) Submerged: 3708 tonnes (3650 tons)
Displacement: 2,768 long tons (2,812 t) full
Length: 317 ft 7 in (96.80 m)
Beam: 27 ft 2 in (8.28 m)
Draft: 19 ft (5.8 m)
Propulsion: 3 Fairbanks-Morse Diesel engines, 2 Elliott electric motors
Speed: 15 knots (28 km/h; 17 mph) surfaced,
12 knots (22 km/h; 14 mph) submerged
Complement: 84

Grayback class submarine was a class of two guided missile carrying submarines of the United States Navy.

These submarines carried the short-lived (1955–64) Regulus I and Regulus II nuclear cruise missiles that were quickly phased out by Polaris Submarine Launched Ballistic Missiles (SLBMs). They and the USS Halibut (SSGN-587) were the sole submarines designed specifically to carry Regulus.



  • Jackson, Robert. "Fighting Ships of The World." London: Amber Books Ltd, 2004 Pg.314 ISBN 9781840136470
  • Gardiner, Robert. "Conway's All the World's Fighting Ships 1947-1995." London: Conway Maritime Press, Ltd, 1995 Pg. 609-610

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