Torpedo Mk 10 was developed by the E.W. Bliss Co. and the Naval Torpedo Station, Newport, R.I., and produced in 1915 by the Torpedo Station, to be used as a fast, short-range, antisurface ship torpedo. The Mk 10 featured the largest payload (warhead of =500 pounds) of any torpedo developed up to that time. Used in R- and S-class submarines after World War I, this torpedo saw service in the early years of the second World War.