 It remained in use with the US Navy until 1928, and was also widely used as a civil passenger and utility aircraft.In late 1916, the Curtiss Aeroplane Company produced a new twin-engined flying boat, which was smaller than both the current Curtiss H-12 being built for Britain's Royal Naval Air Service and the earlier Curtiss H-4, with the new design given the factory designation Model H-14, although its design was unrelated to earlier Model H variants.The H-14 was a conventional unequal-span, unstaggered biplane, powered by two 100 hp (75 kW) pusher Curtiss OXX engines mounted between the wings.