HMS K11

HMS K11 was a K-class steam submarine built by Armstrong Whitworth at Newcastle upon Tyne, laid down in October 1915 and commissioned in February 1917 with a complement of 59. The K class combined two oil-fired boilers and a geared steam turbine for surface running with electric motors for diving and a small diesel engine, and reached about 24 knots on the surface. In 1917 K11 was damaged by fire on a North Sea patrol and had to be towed by a destroyer. She took part in the disastrous Battle of May Island exercise, in which she took avoiding action against K14 and survived. She was sold for scrap with HMS K10 on 4 November 1921, and both boats sank while under tow in the North Sea.