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The real ship was the Essex, a Nantucket whaler sunk near the Galapagos in 1820 by an unruly white sperm whale. It made national news and inspired Melville to write Moby Dick but the real event was even more remarkable than what's in the John Huston film.
Huston co-wrote the script with -- of all people -- Ray Bradbury.
https://en.wikipedia.org/wiki/Essex_(whaleship)