 The two prototype aircraft were embarked upon , which sailed for the Aegean on 21 March 1915 to take part in the Gallipoli campaign.On 12 August 1915 one of these, piloted by Flight Commander Charles Edmonds, was the first aircraft in the world to attack an enemy ship with an air-launched torpedo.On 17 August 1915 Flight Commander Edmonds torpedoed and sank an Ottoman transport ship a few miles north of the Dardanelles.