Knot Unit | All you need to know

A knot is a unit of speed equal to one nautical mile per hour. Maritime navigation, aviation, and oceanography use knots as the standard speed measurement. Ship speedometers display knots. Aircraft airspeed is measured in knots. Wind speeds at sea are expressed in knots. The knot developed from nautical traditions and remains internationally standardized for water and air navigation because the nautical mile relates directly to Earth's circumference and latitude/longitude systems. Learn more about knot.