Based on the true story of the Essex, a whaling ship that was attacked and sunk by a sperm whale in the southern Pacific Ocean in 1820. The incident inspired Herman Melville's "Moby Dick".
According to Ron Howard and the commentary on the film, to prepare for the role of starving sailors, the cast were on a diet of 500-800 calories a day to lose weight.
While Owen Chase's career flourished after the Essex ordeal, his personal life included several tragedies. His wife, Peggy, had two additional children: Lydia and William. She died shortly after William's birth, while Chase was at sea. He then married Nancy Joy, widow of his friend and Essex second mate Matthew Joy. Nancy gave birth to a daughter, Adaline, then died a few weeks later, while Chase was at sea. His third wife, Eunice Chadwick, apparently had an affair that resulted in a son, Charles, who was born when Chase had been at sea for 16 months. Chase filed for divorce upon his return, and raised Charles as his own. In 1840, soon after his divorce was settled, he married Susan Coffin Gwinn, widow of fellow Nantucket whaler captain James Gwinn. Chase suffered from nightmares and migraines, and spent several years in an institution after he started hoarding food in his attic. He died in 1859, at age 62.
Although supposedly the inspiration for what would be the "America's epic", written by an American, about Whalers from America, and with the story starting & ending in America, among the first 25+ actors listed in the credits, only ONE is an American.
The trivia item below may give away important plot points.
The Essex crew attempts to reach Mas a Tierra island, in the Juan Fernandez Archipelago (Chile). Over 100 years earlier, Scotsman Alexander Selkirk had his own ordeal stranded on that island. His story was the basis for Daniel Defoe's "Robinson Crusoe".