In 1919, the United States Navy decided to plan a mission to complete the first trans-Atlantic crossing by aircraft. This mission would demonstrate the capabilities of the Navy Curtis seaplane. The mission began with three identical aircraft, NC-1, NC-3, and NC-4 departing from Naval Air Station Rockaway on May 8, 1919. On May 15 the aircraft arrived at Trepassey, Newfoundland, having made intermediate stops along the way. There they met their "base ship" the , recently converted from minelayer to seaplane tender.