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Encyclopedia > Draft (nautical)

In nautical parlance, draft is the depth below water's surface of the lowest part of a ship or boat. Draft is usually determined for a fully-laden vessel. It determines the minimum depth of water that the vessel may pass through. Riverboats are often purposely designed with a shallow draft to avoid sandbars and other obstacles. This article is in need of attention. ... Italian ship-rigged vessel Amerigo Vespucci in New York Harbor, 1976 A ship is a large, sea-going watercraft, sometimes with multiple decks. ... Lobster boat A boat is a watercraft, usually smaller than most ships. ... A first class tourist riverboat High speed planing riverboat High speed hydrofoil riverboat Local passenger transport craft Riverboat specialized for cargo truck transport Self propelled gravel barge M.V. Splendid China layout A riverboat is a specialized watercraft (vessel) designed for operating on inland waterways. ... In geography, a bar is a linear shoaling landform feature within a body of water. ...

Also in nautical parlance, the draft of a sail is a degree of curvature in a horizontal cross-section. Any sail experiences a force from the prevailing wind just because it impedes the air's passage. A sail with draft also functions as an airfoil when set at an angle slightly greater than the angle of the wind, producing lift which then propels. A sail is any type of surface intended to generate thrust by being placed in a wind —in essence a vertically-oriented wing. ... Curvature is the amount by which a geometric object deviates from being flat. ... Wind is the quasi-horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earths surface. ... An airfoil (in American English, or aerofoil in British English) is the shape of a wing or blade (of a propeller or ships screw) as seen in cross-section. ...

It is also spelt Draught, with the pronunciation of draft.

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