Owen Chase was first mate of the whaler Essex, which sank in the Pacific Ocean on November 20, 1820, after being rammed by a sperm whale. Soon after his return to Nantucket, Chase wrote an account of the shipwreck and the attempts of the crew to reach land in small boats. The book, Narrative of the Most Extraordinary and Distressing Shipwreck of the Whale-Ship Essex, was published in 1821 and would inspire Herman Melville to write Moby-Dick.

A chief mate (C/M) or chief officer, usually also synonymous with the first mate or first officer, is a licensed mariner and head of the deck department of a merchant ship. The chief mate is customarily a watchstander and is in charge of the ship's cargo and deck crew. The actual title used will vary by ship's employment, by type of ship, by nationality, and by trade: for instance, chief mate is not usually used in the Commonwealth, although chief officer and first mate are; on passenger ships, the first officer may be a separate position from that of the chief officer that is junior to the latter.