PBS Documentary - USS Indianapolis: The Final Chapter

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In July 1945, the USS Indianapolis has just delivered “Little Boy” – the atomic bomb destined for Hiroshima – when she is sunk by a Japanese sub. 300 sailors go down with her, and the 900 survivors drift for four and a half days, battling the sun, thirst, sharks, and their own fear. Ultimately, only 316 of them are pulled from the sea alive.

Wiki

In 1945, the sinking of Indianapolis led to the greatest single loss of life at sea, from a single ship, in the history of the US Navy. The ship had just finished a high-speed trip to United States Army Air Force Base at Tinian to deliver parts of Little Boy, the first nuclear weapon ever used in combat, and was on her way to the Philippines on training duty. At 0015 on 30 July 1945 the ship was torpedoed by the Imperial Japanese Navy submarine I-58, and sank in 12 minutes. Of 1,195 crewmen aboard, approximately 300 went down with the ship.[4] The remaining 890 faced exposure, dehydration, saltwater poisoning, and shark attacks while floating with few lifeboats and almost no food or water. The Navy learned of the sinking when survivors were spotted four days later by the crew of a PV-1 Ventura on routine patrol. Only 316 survived.[4]

On 19 August 2017, a search team financed by Paul Allen located the wreckage of the sunken cruiser in the Philippine Sea lying at a depth of approximately 18,000 ft (5,500 m).[5] On December 20, 2018, the crew of the Indianapolis was collectively awarded a Congressional Gold Medal.[6]