How long is a nautical mile?
A nautical mile equals exactly 1.852 meters (about 6,076 feet) by an international agreement. First the nautical mile was the distance spanned by one minute of arc along a meridian of the Earth (north-south). This unit of distance origins from geographical mile. The nautical mile is usually applied in international treaties, concerning the borders of territorial water, and in numerous cases of official international communication and cooperation.