In 1954, Electric Boat launched , the world's first nuclear-powered submarine. Presently, "Nautilus" is decommissioned and open for visitors, permanently berthed at the U.S. Navy Submarine Force Library and Museum. Groton is sometimes referred to as the "Submarine Capital of the World," due to the long-standing history of submarines in the town, and the fact that Groton has one of the largest submarine bases in the world. The National World War II Submarine Memorial East is located in Groton, including parts of .