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HMS Sentinel (P256)
HMS Sentinel.jpg
HMS Sentinel
Career Royal Navy Ensign
Class and type: S class submarine
Name: HMS Sentinel
Builder: Scotts, Greenock
Laid down: 15 November 1943
Launched: July 27, 1945
Commissioned: 28 December 1945
Fate: sold February 28, 1962
General characteristics
Displacement: 814-872 tons surfaced
990 tons submerged
Length: 217 ft (66 m)
Beam: 23 ft 6 in (7.16 m)
Draught: 11 ft (3.4 m)
Speed: 14.75 knots surfaced
8 knots submerged
Complement: 48 officers and men
Armament: 6 x forward 21-inch torpedo tubes, one aft
13 torpedoes
one three-inch gun (four-inch on later boats)
one 20 mm cannon
three .303-calibre machine gun

HMS Sentinel was an S class submarine of the Royal Navy, and part of the Third Group built of that class. She was built by Scotts of Greenock and launched on July 27, 1945.

Commissioned after the end of the Second World War, she had a relatively peaceful career. In 1953 she took part in the Fleet Review to celebrate the Coronation of Queen Elizabeth II.[1] Sentinel was sold on February 28, 1962, being broken up at Gillingham.[2]


  1. Souvenir Programme, Coronation Review of the Fleet, Spithead, 15th June 1953, HMSO, Gale and Polden
  2. HMS Sentinel,


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