The USS Indianapolis was huge warship used by the United States during World War II. This baby had a couple years of heavy service under heavy fire and important missions.
Well until it was sunk by a Japanese submarine in 1945.
Despite sinking about 900 men survived the torpedo bombings. However they were stuck in the water most of them without life boats, food, or water. They also had to survive the conditions of the sea, thoughts of suicide (which some committed), and one more thing.
Sharks. Yeah there was apparently a lot of shark attacks going on here. I guess they smelt all the blood from miles away.
The men were stuck out to sea for about 4 days. 5 men they rescued died soon after reaching land. Only 316 sailor survived the whole ordeal.