High Quality Content by WIKIPEDIA articles! USS Indianapolis (CA-35) was a Portland-class cruiser of the United States Navy. She holds a place in history due to the circumstances of her sinking, which led to the greatest single loss of life at sea in the history of the U.S. Navy. After delivering critical parts for the first atomic bomb to the United States air base at Tinian on 26 July 1945, she was in the Philippine Sea when attacked at 0014 on 30 July 1945 by the Imperial Japanese Navy submarine I-58. The ship sank in 12 minutes. Of 1,196 crew aboard, approximately 300 went down with the ship. The remaining crew of about 900 faced exposure, dehydration and shark attacks as they waited for assistance while floating in shark-infested waters with no lifeboats and almost no food or water. The ship was not listed overdue and the survivors were spotted by accident four days later. There were only 316 survivors.[2] Indianapolis was one of the last US Navy ships sunk by enemy action in World War II. (USS Bullhead was attacked by Japanese aircraft with depth charges and probably sunk on 6 August 1945.)