http://en.wikipedia.org/wiki/Short_Type_184Quote:
In August 1915, a Short 184 of piloted by Flight Commander Charles H. K. Edmonds from HMS Ben-my-Chree operating in the Aegean became the first aircraft in the world to attack an enemy ship with an air-launched torpedo.
However, on 17 August 1915, another Turkish ship was sunk by a torpedo of whose origin there can be no doubt. On this occasion Flight Commander C H Edmonds, flying a Short 184, torpedoed a Turkish steamer a few miles north of the Dardanelles. His formation colleague, Flt Lt G B Dacre, was forced to land on the water owing to engine trouble but, seeing an enemy tug close by, taxied up to it and released his torpedo. The tug blew up and sank. Thereafter Dacre was able to take off and return to the Ben-My-Chree.