Duhaime's Law Dictionary Jetsam Definition: Things intentionally thrown overboard a ship in order to save the ship, and which things thrown over then sink. Related Terms: Flotsam, Ligan, Wreck Distinguished from flotsam and ligan and part of the maritime law principles of general average. William Blackstone, at paragraph 292 of his Commentaries on the Laws of England, Book I, wrote: "... in order to constitute a legal wreck, the goods must come to land. If they continue at sea, the law distinguishes them by the barbarous and uncouth appellations of jetsam, flotsam and ligan. "Jetsam is where goods are cast into the sea and there sink and remain under water. "Flotsam is where they continue swimming on the surface of the waves. "Ligan is where they are sunk in the sea, but tied to a cork or buoy in order to be found again." Jestam resembles but is not the same as things jettisoned overboard. Jetsam is by definition things jettisoned but things jettisoned do not become jetsam unless they are recovered from underwater. REFERENCES: Duhaime, Lloyd, Maritime Law Dictionary duhaime.org Maritime and Admiralty Law section at www.duhaime.org/LegalResources/MaritimeLaw.aspx Categories & Topics: Duhaime & Williams Maritime & Waterways Law Dictionary Always looking up definitions? Save time with our search provider (modern browsers only) If you find an error or omission in Duhaime's Law Dictionary, or if you have suggestion for a legal term, we'd love to hear from you!