nautical mile

名词 nautical mile:

1. a British unit of length equivalent to 1,853.18 meters (6,082 feet)
   同义词：naut mi, mile, mi, geographical mile, Admiralty mile
2. a unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meters
   同义词：mile, mi, naut mi, knot, international nautical mile, air mile