HMS H10 was lost in the North Sea on 19 January 1918.
Design
She had a displacement of 364 long tons (370t) at the surface and 434 long tons (441t) while submerged. Her total length was 150feet 3inches (45.8m), with a beam of 15feet 4inches (4.7m) and a draught of 12 feet (3.7m).
Her two diesel engines provided a total power of 480 horsepower (360kW) and her two electric motors provided 320 horsepower (240kW) power which gave the submarine a maximum surface speed of 13 knots (24km/h; 15mph) and a submerged speed of 11 knots (20km/h; 13mph). She would normally carry 16.4 long tons (16.7t) of fuel and had a maximum capacity of 18 long tons (18t)[1] and a range of 1,600 nautical miles (2,963km; 1,841mi). The boat was armed with a 6-pounder (2.7kg)Hotchkissquick-firing gun and four 18-inch (457mm) bow torpedo tubes with six 18-inch (457mm) torpedoes carried. The complement was twenty-two crew members.