The Seventh Fleet is a numbered fleet of the United States Navy. It is headquartered at U.S. Fleet Activities Yokosuka, in Yokosuka, Kanagawa Prefecture, Japan. It is part of the United States Pacific Fleet. At present, it is the largest of the forward-deployed U.S. fleets, with 60 to 70 ships, 300 aircraft and 40,000 Navy, Marine Corps personnel, and Coast Guard support personnel.[1] Its principal responsibilities are to provide joint command in natural disaster or military operations and operational command of all US naval forces in the region.