HMS Ace (P414)

History
United Kingdom
Name	Ace
Builder	Devonport Dockyard
Laid down	3 November 1943
Launched	14 March 1945
Identification	Pennant number: P414
Fate	Broken up, June 1950
General characteristics if completed
Class and type	Amphion-class submarine
Displacement	1,360/1,590 tons (surface/submerged)
Length	293 ft 6 in (89.46 m)
Beam	22 ft 4 in (6.81 m)
Draught	18 ft 1 in (5.51 m)
Propulsion	2 × 2,150 hp (1,600 kW) Admiralty ML 8-cylinder diesel engine, 2 × 625 hp (466 kW) electric motors for submergence driving two shafts
Speed	18.5 kn (34.3 km/h) surface, 8 kn (15 km/h) submerged 10,500 nmi (19,400 km) at 11 kn (20 km/h) surfaced 16 nmi (30 km) at 8 kn (15 km/h) or 90 nmi (170 km) at 3 kn (5.6 km/h) submerged
Test depth	350 ft (110 m)
Complement	60
Armament	6 × 21 inch (533 mm) (2 external) bow torpedo tubes, 4 × 21 in (2 external) stern torpedo tubes, containing a total of 20 torpedoes Mines: 26 1 × 4 in (102 mm) main deck gun, 3 × 0.303 machine gun, 1 × 20 mm AA Oerlikon 20 mm gun

HMS Ace (P414) was the name allocated to an Amphion-class submarine of the Royal Navy which was laid down on 3 December 1943 and launched at Devonport Dockyard on 14 March 1945 during the Second World War.

She was not completed because of the end of the war, however the hull was used for explosives testing before arrival in June 1950 to Messrs. Smith & Houston of Port Glasgow, Scotland to be broken up.