 Other changes included a change to a single pontoon with outrigger floats, an enlarged vertical tail, and a change of powerplant to the Curtiss OXX.On October 26, 1922 Godfrey DeCourcelles Chevalier landed a 39B on a moving ship, USS "Langley", the first time this had been achieved on an American aircraft carrier.Trials of underway carrier takeoffs and landings continued through 1922 and 1923.