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.

Related Topics:
Nautical - Ship - Boat - Riverboat - Sandbar

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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.

Related Topics:
Sail - Curvature - Wind - Airfoil

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

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