SMS S115

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).

Four torpedo-boats of the 7th Half-Flotilla (S119 (leader), S115, S117 and S118) set out from the Ems on 17 October 1914, with these elderly ships selected for this mission because they were unfit for other duties and considered disposable.

The British patrol, the light cruiser Undaunted and four destroyers Lance, Legion, Lennox and Loyal of the Harwich Force, engaged the four German torpedo boats in the Battle off Texel.

The British rescued 34 officers and men from the four German ships, with two more picked up the next day by a neutral fishing vessel.