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JETTISON, or JETSAM. The casting out of a vessel, from necessity, a part of the lading; the thing cast out also bears the same name; it differs from flotsam in this, that in the latter the goods float, while in the former they sink, and remain under water; it differ; also from ligan. (q.v.)
     2. The jettison must be made for sufficient cause, and not from groundless timidity. In must be made in a case of extremity, when the ship is in danger of perishing by the fury of a storm, or is laboring upon rocks or shallows, or is closely pursued by pirates or enemies.
     3. If the residue of the cargo be saved by such sacrifice, the property saved is bound to pay a: proportion of, the loss. In ascertaining such average. loss, the goods lost and saved are both to be valued at the price they would have brought at the place of delivery, on the ship's arrival there, freight, duties and other charges being deducted. Marsh. Ins. 246; 3 Kent, Com. 185 to 187; Park. Ins., 123; Poth. Chartepartie, n. 108, et suiv; Boulay-Paty, Dr. Com. tit. 13; Pardessus, Dr. Com. n. 734; 1 Ware's R. 9.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Specifically, the collective has eight switches with the radio transmit and emergency jettison next to each other.
Simply discussing the placement of the emergency-jettison switch, feeling the switches around it, and moving your thumb left and right across the switches to identify vice mashing straight down could have helped prevent this jettison. Preflight blindfolded cockpit drills and systems discussions are tools that can be used and refined before ever strapping in to the cockpit.
Our jettison occurred in a restricted area, on a range, over a swamp.