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heaving to
In sailing, heaving to (to heave to and to be hove to) is a way of slowing a sailboat's forward progress, as well as fixing the helm and sail positions so that the boat does not actively have to be steered. It is commonly used for a "break"; this may be to wait for the tide before proceeding, to wait out a strong or contrary wind. For a solo or shorthanded sailor it can provide time to go below deck, to attend to issues elsewhere on the boat, or for example to take a lunch break.〔(www.sailingusa.info/points_of_sail.htm )〕〔(【引用サイトリンク】title=Heavy weather conditions at sea (pictures and further explanation) )〕
The term is also used in the context of vessels under power and refers to bringing the vessel to a complete stop. For example, in waters over which the United States has jurisdiction the Coast Guard may, under , demand that a boat "heave to" in order to enforce federal laws.
==Hove to==
A sailing vessel is hove to when it is at or nearly at rest because the driving action from one or more sails is approximately balanced by the drive from the other(s). This always involves 'backing' one or more sails, so that the wind is pressing against the forward side of the cloth, rather than the aft side as it normally would for the sail to drive the vessel forwards. On large square rigged, multi-masted vessels the procedures can be quite complex and varied, but on a modern two-sailed sloop, there is only the jib and the mainsail. A cutter may have more than one headsail, and a ketch, yawl or schooner may have more than one sail on a boom. In what follows, the jibs and boomed sails on such craft can either be treated as one of each, or lowered for the purposes of reduced windage, heel or complexity when heaving to for any length of time.
When a sloop is hove to, the jib is backed. This means that its windward sheet is tight holding the sail to windward. The mainsail sheet is often eased, or the mainsail reefed, to reduce forward movement, or 'fore-reaching'. The rudder is placed so that, should the boat make any forward movement, it will be turned ''into'' the wind, so as to prevent forward momentum building up. In a centerboard boat the centerboard will be partially raised and the tiller held down hard.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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