What is a knot?

What is a knot?

• A. Nautical mile per hour
• B. Miles per hour
• C. Kilometers per hour
• D. Feet per second

Answer: (A)

A knot is a unit of speed defined as one nautical mile per hour. This ties directly to navigation, because nautical miles fit the geometry of Earth and are used on charts for ships and aircraft. A nautical mile is exactly 1,852 meters, so one knot equals about 1.1508 statute miles per hour, or roughly 0.5144 meters per second, and about 1.852 kilometers per hour. In practice, sailors and pilots use knots because they relate to distance on nautical charts and to the continuous, time-based measurement of speed over water or through air. The other units listed are different standards: miles per hour uses statute miles, kilometers per hour uses kilometers, and feet per second uses feet. Since a knot is defined specifically as a nautical mile per hour, those options describe other speed units and not the knot. If you remember the relationship between nautical miles and meters, you can quickly recall that one knot is one nautical mile per hour.

A knot is a unit of speed defined as one nautical mile per hour. This ties directly to navigation, because nautical miles fit the geometry of Earth and are used on charts for ships and aircraft. A nautical mile is exactly 1,852 meters, so one knot equals about 1.1508 statute miles per hour, or roughly 0.5144 meters per second, and about 1.852 kilometers per hour. In practice, sailors and pilots use knots because they relate to distance on nautical charts and to the continuous, time-based measurement of speed over water or through air.

The other units listed are different standards: miles per hour uses statute miles, kilometers per hour uses kilometers, and feet per second uses feet. Since a knot is defined specifically as a nautical mile per hour, those options describe other speed units and not the knot. If you remember the relationship between nautical miles and meters, you can quickly recall that one knot is one nautical mile per hour.