In 1915 and 1916, Saufley's assignments were concerned with the technological development of naval aviation. Concentrating on "hydro-aeroplane" (seaplane) development, he set altitude and endurance records and was attempting to better his own record when he died in a plane crash on Santa Rosa Island on a flight out of the Naval Aeronautic Station at Pensacola, Florida on 9 June 1916. His Curtiss Model E hydroplane, AH-8, went down at the 8-hour-51-minute mark of the flight.[1] The Aeronautic Station's commandant, CommanderHenry C. Mustin, later faced accusations that his "wrong flying instruction methods" had caused the deaths of Saufley and another aviator, Lieutenant, junior grade, James V. Rockwell.
Saufley is buried at Stanford Cemetery in Stanford, Kentucky.