How long is one nautical mile in kilometers?

One nautical mile is defined as exactly 1.852 kilometers. This measurement is based on the circumference of the Earth and is used in maritime and air navigation as a standard unit of distance. The nautical mile is particularly useful because it corresponds directly to one minute of latitude, making it easier for navigators to calculate distances on charts that use latitude and longitude.

The choice that states "1.85 kilometers" is the closest approximation to the correct measurement but does not represent the standard definition accurately. The precise conversion indicates that a nautical mile is slightly more than 1.85 kilometers, at 1.852 kilometers. The other options provide values that are either significantly higher or lower than the actual measurement, making them less relevant for navigational purposes. Understanding this conversion is crucial for anyone involved in boating and navigation, as it helps ensure accurate distance calculations on the water.