 An order for ten aircraft was placed, and 936 aircraft were built by ten different British aircraft companies during the First World War.The two prototype aircraft were embarked upon HMS "Ben-my Chree", which sailed for the Aegean on 21 March 1915 to take part in the Gallipoli campaign.Around the same time of the Royal Navy experiments, in Italy Captain Alessandro Guidoni of the Regia Marina was conducting similar trials since 1913, with the help of inventor Raúl Pateras Pescara, and in February 1914 successfully dropped an 800 lb torpedo, leading to disputes over which country first used an aerial torpedo.