SMS S116[a][b] was a S90-class torpedo boat of the Imperial German Navy that served during the First World War.

Three coal-fired Thornycroft three-drum water-tube boilers fed steam to 2 sets of 3-cylinder triple expansion steam engines rated at 5,900 PS (5,800 ihp; 4,300 kW), giving a design speed of 27 knots (50 km/h; 31 mph), with speeds of 28 knots (52 km/h; 32 mph) reached during sea trials.

102 tonnes (100 long tons) of coal was carried, giving a range of 980 nautical miles (1,810 km; 1,130 mi) at 17 knots (31 km/h; 20 mph).

[7] S116 had a gun armament of three 5 cm SK L/40 guns in single mounts, while torpedo armament consisted of three single 450 mm torpedo tubes (one in a well deck between the raised forecastle and the bridge, with the remaining two tubes aft of the bridge.

[17][18] On 6 October 1914, S116 was on patrol off the western entrance to the river Ems with S117, when she was spotted by the British submarine E9, commanded by Max Horton, one of three submarines[c] that had been deployed as part of an abortive operation by the Harwich Force against the German patrols off the Ems estuary.