HMS Tiara (P351)

History
United Kingdom
Builder:	Portsmouth Dockyard
Laid down:	8 April 1943
Launched:	18 April 1944
Fate:	Scrapped June 1947
General characteristics
Class & 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 (4.44 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 9 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:	6 internal forward-facing torpedo tubes 2 external forward-facing torpedo tubes 2 external amidships rear-facing torpedo tubes 1 external rear-facing torpedo tubes 6 reload torpedoes 4 inch (100 mm) deck gun 3 anti aircraft machine guns

HMS Tiara (P351) was a Royal Navy Group Three T-class submarine laid down at Portsmouth Dockyard on 8 April 1943 and launched on 18 April 1944. However the war ended before she was completed and she arrived at Dover Industries for scrapping in June 1947 . Her sister vessel Thor was launched on the same day at Portsmouth dockyard and not completed either. She would have been the only ship of the Royal Navy to bear the name Tiara.