what is a nautical mile

A nautical mile is a unit of distance used mainly in sea and air navigation. It is defined as exactly 1,852 meters , which is about 1.15 statute miles.

Quick Scoop

A nautical mile is based on the Earth’s geometry, roughly matching one minute of arc of latitude on a chart, which makes it especially useful for navigation.

Why it matters

• Maritime use: Ships use nautical miles to measure voyage distances and chart routes.

• Aviation use: Pilots use nautical miles for distances between airports and navigation points.

• Speed connection: 1 knot = 1 nautical mile per hour.

Simple example

If a boat travels 10 nautical miles , it has gone about 18.52 kilometers or about 11.5 statute miles.

If you want, I can also explain the difference between a nautical mile, statute mile, and knot in one quick table.