Career
Ordered:
Laid down:	February 19 1902
Launched:	March 1904
Commissioned:	February 11 1905
Decommissioned:	December 1915
Fate:	Scrapped in 1920 at Portsmouth Dockyard
Struck:
General Characteristics
Displacement:	190 tons surfaced, 207 tons submerged
Length:	105.25 feet (32 m)
Beam:	12.75 feet (3.9 m)
Draught:	10.5 feet (3.2 m)
Propulsion:	550 HP petrol engine 150 HP electric engine
Speed:	11 knots maximum surfaced 8 knots maximum submerged
Range:	325 miles at 11 knots surfaced 20 miles at 6 knots submerged
Complement:	13 (2 officers and 9 ratings)
Armament:	Two 18 inch (457 mm) torpedo tubes, plus two reloads

HMS A5 was an early Royal Navy submarine.

She was a member of Group Two of the first British A-class of submarines (a second, much different A-class submarine appeared towards the end of the Second World War). Like Like all members of her class, she was built at Vickers Barrow-in-Furness.

Immidealty after commissioning she and her tender HMS Hazzard travelled to Queenstown, Ireland (now Cobh, Eire). On February 16 1905 whilst tied up alongside Hazzard an explosion occurred onboard her. It was later established that it was caused by petrol fumes being ignited by sparks produced by the electric motor brushes. This was followed by another larger explosion half an hour later triggered by smouldering material from the first one. Six of her crew were killed.

She was returned to Barrow-in-Furness the following month for repairs and returned to service in October. She was used for training until paid off for disposal in December 1915 although she was not broken up until 1920.