Originally designed for land-based use, the Model 34C was virtually identical to the P-1 Hawk in United States Army Air Corps service. The United States Navy ordered nine, but as the sixth example was built it was strengthened for carrier-borne operations and redesignated as the Model 34D. Flown from the carriersLangley and Lexington from 1927–1930, most of the later variants passed to Marine fighter-bomber units, while a few were flown for a time as twin-float seaplanes.