The U.S. Navy hull number of USS Missouri, the ship used for Japan's surrender ceremony, was BB-63.
Missouri was an Iowa-class battleship and the fourth ship of the United States Navy to bear the name. Its designation, BB-63, identified it as a battleship in the Navy's hull classification system and as the 63rd battleship number assigned in that sequence.
The ship was commissioned in June 1944 and joined the Pacific Fleet in 1945. It participated in operations against Japan before becoming the setting for the formal surrender on September 2, 1945. The signed document and the deck location remain central parts of the ship's historical identity.
Missouri later served in the Korean War and was recommissioned for service in the 1980s. It is now preserved as a museum ship at Pearl Harbor in Hawaii. Its hull number is often used to distinguish it from other famous U.S. battleships, especially USS Iowa, BB-61.