Knot (nautical)

A knot isunitspeed equalone nautical mile per hour. It1852 metres per hour precisely (approx 1.15 mph).

The knotwidely usedairsea navigation.

In many sailing ships, speed was measured by castinglog fromstern. The log was relatively immobile,attached by line toreel. Knots placed atdistance47 feet 3 inches passed throughsailor's fingers, while another used28-second sandglasstimeoperation. The knot count would be reportedused insailing master's dead reckoningnavigation.

See also: Conversion CalculatorUnitsSPEED