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Tacking or coming about is a sailing maneuver by which a sailing craft (sailing vessel, ice boat, or land yacht), whose next destination is into the wind, turns its bow toward and through the wind so that the direction from which the wind blows changes from one side of the boat to the other, allowing progress in the desired direction. [1]
A tack is the windward side of a sailing craft (side from which the wind is coming while under way)—the starboard or port tack. Generally, a craft is on a starboard tack if the wind is coming over the starboard (right) side with sails on port (left) side. Similarly, a craft is on a port tack if the wind is coming over the port (left).
However, under sail on a given tack, the corner to which the spinnaker sheet is attached is called the clew, and the corner attached to the spinnaker pole is referred to as the tack. [20] Tack – The tack is the corner on a fore-and-aft sail where the luff and foot connect [8] and, on a mainsail, is located where the boom and mast connect.
Sailing ships became longer and faster over time, with ship-rigged vessels carrying taller masts with more square sails. Other sail plans emerged, as well, that had just fore-and-aft sails ( schooners ), or a mixture of the two ( brigantines , barques and barquentines ).
In square rigged ships the staysails can help in tacking, overcoming the lumbering square sails' tendency to prevent bearing up to windward, especially in light winds. Where a ship attempts to tack but fails and has to bear away again on the original tack, she is said to have missed her stays.
While the aft sponsons act as trimaran sponsons do, the front sponsons do not touch the water normally; only if the ship rolls to one side do they provide added buoyancy to correct the roll. [25] [26] BMT Group, a shipbuilding and engineering company in the UK, has proposed a fast cargo ship and a yacht using this kind of hull. [27] [28]
A pitch motion is an up-or-down movement of the bow and stern of the ship. The longitudinal/X axis, or roll axis, is an imaginary line running horizontally through the length of the ship, through its centre of mass, and parallel to the waterline. A roll motion is a side-to-side or port-starboard tilting motion of the superstructure around this ...
Star Flyer, a 112 m (367 ft) sail cruise ship launched in 1991, in the Pacific. This is a list of large sailing vessels, past and present, including sailing mega yachts, tall ships, sailing cruise ships, and large sailing military ships. It is sorted by overall length.