Sailing
Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the "water" (sailing ship, sailboat, windsurfer, or kitesurfer), on "ice" (iceboat) or on "land" (land yacht) over a chosen course, which is often part of a larger plan of navigation.

Until the middle of the 19th century, sailing ships were the primary means for marine exploration, commerce, and projection of military power; this period is known as the Age of Sail. In the 21st century, most sailing represents a form of recreation or sport. Recreational sailing or yachting can be divided into racing and cruising. Cruising can include extended offshore and ocean-crossing trips, coastal sailing within sight of land, and daysailing.

Sailing relies on the physics of sails as they derive power from the wind, generating both lift and drag. On a given course, the sails are set to an angle that optimizes the development of wind power, as determined by the apparent wind, which is the wind as sensed from a moving vessel. The course with respect to the true wind direction (as sensed from a stationary location) is called a point of sail. Conventional sailing craft cannot derive power from sails on a point of sail that is facing too close into the wind. The forces transmitted via the sails are resisted by forces from the hull, keel, and rudder of a sailing craft, by forces from skate runners of an iceboat, or by forces from wheels of a land sailing craft to allow steering the course.
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wind
Concept
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Concept
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wingsail
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kite
Concept
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sailing ship
Concept
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sailboat
Concept
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windsurfer
Concept
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kitesurfer
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iceboat
Concept
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land yacht
Concept
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Concept
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navigation
Concept
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Age of Sail
TIME
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21st century
Concept
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Concept
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Recreational sailing
Concept
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yachting
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cruising
Concept
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physics of sails
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Concept
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point of sail
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hull
Concept
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Concept
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rudder
Concept
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Sailing
Concept
Q192520
Sailing
Concept
+19^^http://www.w3.org/2001/XMLSchema#decimal
19
NUMBER
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21
NUMBER
used by
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