SEA MILE

unit of measurement used in boating

A nautical mile or sea mile is a unit of length. It is a non-SI unit used by special interest groups such as navigators in the shipping and aviation industries. It is commonly used in international law and treaties, especially regarding the limits of territorial waters. It developed from the geographical mile.
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Noun
1. a former British unit of length once used in navigation; equivalent to 1828.8 meters (6000 feet)
(synonym) mile
(hypernym) nautical linear unit

A geographical mile. See Mile.
  

sea mile /'si:mail/
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