SAN MARCOS PUBLIC LIBRARY 625 E. HOPKINS ST. 512-393-8200
Q. What is the origin of the word knot as used to describe speed at sea? How do knots compare to miles per hour?
A. According to the “World Book Encyclopedia,” a knot is a unit of speed used for ships and aircraft. It equals one nautical mile an hour. A ship with a 20- knot speed can travel 20 nautical miles in an hour.”
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