HMS C12

HMS C12 was a British C class submarine built by Vickers, Barrow. She was laid down on 27 November 1906 and was commissioned on 19 January 1908.

C12 was sunk in a collision with a destroyer in the Humber Estuary on 6 October 1918. She was salvaged and recommissioned.

She was sold on 2 February 1920.