What does the term 'knot' refer to in nautical terms?

The term 'knot' in nautical terms refers specifically to the velocity of one nautical mile per hour. This unit of measurement is standard in maritime contexts and is used to express the speed of ships and other vessels. One nautical mile, which is approximately 1.15 statute miles, is defined based on the circumference of the Earth, making it particularly useful for navigation over large distances on water.

Understanding the significance of nautical miles and knots is crucial for navigation because it allows mariners to accurately chart their courses and estimate travel times based on their speed. This unit is deeply ingrained in maritime practices, thus making it an essential concept for anyone involved in ocean navigation and sailing.