HMS Tantalus (P318)

	HMS Tantalus in Plymouth Sound in August 1948
History
United Kingdom
Name	HMS Tantalus
Builder	Vickers Armstrong, Barrow
Laid down	6 June 1942
Launched	24 February 1943
Commissioned	2 June 1943
Identification	Pennant number P318
Fate	Scrapped in November 1950
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General characteristics
Class and type	British T class submarine
Displacement	1,290 tons surfaced; 1,560 tons submerged;
Length	276 ft 6 in (84.28 m)
Beam	25 ft 6 in (7.77 m)
Draught	12 ft 9 in (3.89 m) forward; 14 ft 7 in (4.45 m) aft;
Propulsion	Two shafts; Twin diesel engines 2,500 hp (1.86 MW) each; Twin electric motors 1,450 hp (1.08 MW) each;
Speed	15.5 knots (28.7 km/h) surfaced; nine knots (20 km/h) submerged;
Range	4,500 nautical miles at 11 knots (8,330 km at 20 km/h) surfaced
Test depth	300 ft (91 m) max
Complement	61
Armament	Six internal forward-facing 21-inch (533 mm) torpedo tubes; two external forward-facing torpedo tubes; two external amidships rear-facing torpedo tubes; one external rear-facing torpedo tubes; six reload torpedoes; 1 x 4-inch (102 mm) deck gun; three anti-aircraft machine guns;

HMS Tantalus was a British submarine of the third group of the T class. She was built as P318 by Vickers Armstrong, Barrow, and launched on 24 February 1943. So far she has been the only ship of the Royal Navy to bear the name Tantalus, after the mythological Tantalus, son of Zeus.

Service

Tantalus served in the Far East for much of her wartime career. She sank the Malaysian tug Kampung Besar, and the Malaysian Pulo Salanama in April 1944; she went on to sink the Japanese army cargo ships Amagi Maru and Hiyoshi Maru, the Japanese cargo ship Hachijin Maru, the Japanese coaster Palang Maru, the Japanese fishing vessel Taisei Maru No. 12, a Japanese tug and three barges, an unknown Japanese vessel, and a Siamese sailing vessel, whilst claiming to have damaged a second. Tantalus also damaged a tug and the Japanese submarine chaser Ch 1. She also attacked, but missed the Japanese submarine I-166, which was sunk later that day by HMS Telemachus.