knot is measure of
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knot is the unit of speed equal to one nautical mile per hour
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The term knot derives from its former use as a length measure on ships' log lines, which were used to measure the speed of a ship through the water. Such a line was marked off at intervals by knots tied in the rope. Each interval, or knot, was about 47 feet (14.3 metres) long.A knot is a unit of speed. It is abbreviated kt or kn. It is a non-SI unit accepted for use with the SI. It is used around the world in meteorology and for maritime and aviation purposes.
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