Steven Callahan was sailing from the Canary Islands in 1982 when his boat sank after 6 days into the trip. Left adrift on a 5-ft life raft, he managed to survive on just 3 lbs of food and 8 pints of water for 1800 miles, enduring starvation, dehydration and even shark attacks.

After spending 76 days on the open ocean, he was finally rescued by fishermen in the Caribbean.