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The Dictionary of English Nautical Language Database: Search Results

  Your search returned 8 matches.
Term: displacement speed (n)
Definition: The maximum speed attainable by a displacement hull vessel, a function of its shape, waterline length, displacement and drag. Adding additional power beyond this speed may increase the speed by a small increment, but is not economical.
See Also: hull speed

Term: flank speed (n)
Definition: The fastest speed of which a ship is capable. The term is used exclusively aboard warships to describe an emergency speed which is employed only in special situations disregarding economy or wear of the vessel.

Term: hull speed (n)
Definition: The maximum speed attainable by a displacement hull vessel no matter how much power is applied; as in: “The hull speed of that cruiser is nine knots.”
See Also: displacement speed

Term: speed (n)
Definition: The rate of motion of a vessel over the water or over the bottom.

Term: speed curve (n)
Definition: A plotted scale showing the relationship between engine speed or shaft rotatation in revolutions per minute and the speed of the boat through the water.

Term: speedboat (n)
Definition: A light powerful motor launch capable of high speeds.

Term: wind speed indicator (n)
Definition: An electronic instrument which measures and displays the relative velocity of the wind. Usually there is a small propeller mounted aloft which spins in the wind. The speed of the turning propeller is gauged electrically and displayed on a readout at the helm.
See Also: anemometer

Term: cruising speed (n)
Definition: The optimal speed of a vessel taking into account hull form, engine and propeller functions and fuel economy.


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