Some Rolls-Royce products ride as if they ve gone airborne. That s because they are. The United States is the global headquarters for Rolls-Royce Naval Marine helicopters, corporate and regional aircraft and energy businesses. Rolls-Royce Naval Marine is one of the largest propeller manufacturers in the United States, with sites in Walpole, Mass.; Pascagoula, Miss.; Annapolis, Md.; and Seattle. The company s Walpole site manufactures variable pitch propellers for naval and commercial ships. It also has the capability to design and manufacture controllable pitch and fixed-pitch propeller systems. In Pascagoula, the company manufactures marine propellers for the United States Navy as well as the commercial marine market. The Naval Marine PDI division in Annapolis provides systems engineering, dynamics and control, computer applications and software and control system design and analysis.