The origin of the word knot to measure wind speed is thought to have come from the original technique of measuring the speed of a ship in "nautical" miles and then expanded to include the speed of any vessel relative to the substance in which it travels (such as a plane in the case of air speed or wind).
This morning while washing my hair in the shower it occurred to me that wind speed is definitely measured in knots because of the correlation between wind speed and the number of knots it puts in your hair!
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