The AD Flying Boat was designed by the British Admiralty's Air Department to serve as a patrol aircraft that could operate in conjunction with Royal Navy warships. Intended for use during World War I production of the aircraft was terminated as the end of the war came into sight and the type saw little operational use. A number were re-purchased after the end of the War by Supermarine Aviation and rebuilt as civil Transports becoming known as the Supermarine Channel.
Made by Pemberton-Billing Ltd..