The US Navy pre-dreadnought battleship USS Kearsarge BB-5 was decommissioned in May 1920, Kearsarge and converted into a crane ship. Originally given hull classification IX-16 on 17 July 1920, this was changed to AB-1 on 5 August. Her turrets, superstructure, and armor were removed, and replaced by a large revolving crane with a lifting capacity of 250 tons (230 tonnes), as well as 10-foot (3.0 m) blisters, which improved her stability.
On 6 November 1941, Kearsarge was renamed Crane Ship No. 1, allowing her name to be reused (originally for CV-12, which was later changed to Hornet and then for Kearsarge CV-33). During the Second World War, she was used to facilitate the movement and placement of heavy equipment such as guns, turrets, and armor for ships including the Indiana, Alabama, Savannah, Chicago, and Pennsylvania.
In 1945, after being towed to the Hunters Point Naval Shipyard, San Francisco, she worked on the Essex-Class carriers Hornet and Boxer, as well as the Saratoga.