USS Rotanin (AK-108) was a Crater-class cargo ship commissioned for the Merchant Marines for service in World War II. She was responsible for delivering troops, goods and equipment to locations in the war zone. Rotanin (AK-108), originally named SS William Kelly, was laid down 24 July 1943 under Maritime Commission contract (MCE-1872) by the California Shipbuilding Co., Terminal Island, California; launched 18 August 1943, sponsored by Mrs. Andrew R. Bone; and commissioned 23 November 1943, Lt. William L. Howard, USNR, in command.