HMS A3

HMS A3 was an early Royal Navy submarine.

She was a member of the first British A-class of submarines, although slightly bigger than the lead boat, HMS A1. She was built at Vickers, Barrow-in-Furness and was commissioned on 13 July 1904. She was accidentally rammed whilst surfacing by the submarine tender HMS Hazard (1894) off the Isle of Wight on 2 February 1912 and sank with the loss of all on board. The wreck was salvaged and subsequently sunk as a gunnery target near Portland Bill on 12 May 1912, where she remains today.