Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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bell buoy a buoy having a warning bell that rings whenever the buoy is rocked by waves.
breeches buoy a nautical rescue device consisting of a canvas sling with leg holes that is suspended from a life preserver, used to transfer the rescued person up a rope to a ship.
life buoy a buoyant ring-shaped device usu. kept on boats, used to keep a person afloat until he or she can be rescued.