The Advanced Aerial Refueling Boom (AARB) and additional fuel tanks located in the baggage compartments below the main deck increase the KC-10's fuel capacity to 356,000 lbs. The KC-10 has both a centerline refueling boom and a drogue-and-hose system (USMC and Navy aircraft) on the starboard side of the rear fuselage. The KC-10 boom operator is located in the rear of the aircraft with wide window for monitoring refueling. The operator controls refueling operations through a digital fly-by wire system.