The knot is a unit of measurement for the speed of ships and is used in maritime navigation. It means that the ship travels one nautical mile per hour. The origins of using the knot date back to ancient times when ships used ropes with knots tied in them to measure speed. When the ropes or multiple ropes were let out for a certain period of time, the knots that passed through the sailors' hands were counted, thus measuring the speed of the ship in knots. This traditional unit of measurement has continued to be used in maritime navigation to this day.
The knot is a unit of speed used for ships, equivalent to one nautical mile per hour or 1.852 kilometers per hour. So, a ship with a speed of 20 knots can travel at a speed of 20 nautical miles, which is approximately 37 kilometers per hour.
The usage of the term "knot" dates back to the early eras of maritime navigation when ships carried a device called a "chip log" or "log line." It consisted of a wooden board known as a "chip" and a rope that was wound around a reel.
Indeed, the wooden board would be thrown into the water behind the ship, and as the ship moved, the rope would freely unwind, while the wooden board remained stationary. The rope would have knots tied at specific intervals, with each interval measuring 47 feet and 3 inches (14.4 meters) in length.
Correct, the first knot represented the end of the first interval, and after two knots, two intervals would be completed, and so on.
By calculating the number of knots, their corresponding distances, and dividing them by the elapsed time, the speed is determined in the unit of knots per hour (knots/hour).
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