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(Russian lavirovanie). (1) The movement of a vessel with frequent changes in the course to evade certain obstacles (ice floes, underwater hazards, and so on).
(2) The maneuvering of a sailing vessel that permits it to advance against the wind; it is accomplished by setting the sails close-hauled alternately on starboard and port tacks.
the process of bringing a sailing vessel onto a different tack by turning the bow of the vessel into the wind. The tacking maneuver is usually executed when the vessel is sailing close-hauled. Tacking is easier to execute for fore-and-aft rigged vessels than for square-rigged vessels.