HMS A3

	HMS A3
History
United Kingdom
Name	HMS A3
Builder	Vickers, Sons & Maxim, Barrow-in-Furness
Yard number	295
Laid down	6 November 1902
Launched	9 May 1903
Commissioned	13 July 1904
Fate	Sunk in collision 2 February 1912; Refloated; Sunk as target 17 May 1912;
General characteristics
Class & type	A-class submarine
Displacement	190 long tons (193 t) surfaced; 206 long tons (209 t) submerged;
Length	105 ft (32.0 m)
Beam	12 ft 9 in (3.9 m)
Draught	10 ft 8 in (3.3 m)
Installed power	450 bhp (340 kW) (petrol engine); 150 hp (110 kW) (electric motor);
Propulsion	1 × 16-cylinder Wolseley petrol engine; 1 × electric motor;
Speed	10 knots (19 km/h; 12 mph) surfaced; 7 knots (13 km/h; 8.1 mph) submerged;
Range	320 nautical miles (590 km; 370 mi) at 10 kn (19 km/h; 12 mph) surfaced
Complement	2 officers and 9 ratings
Armament	2 × 18-inch (45 cm) torpedo tubes

HMS A3 was an A-class submarine built for the Royal Navy in the first decade of the 20th century. She sank in 1912. The wreck is a Protected Wreck managed by Historic England.