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( Nautical mile)
A nautical mile or sea mile is a unit of length. It corresponds approximately to one minute of latitude along any meridian. It is a non-SI unit used especially by navigators in the shipping and aviation industries.[1] It is commonly used in international law and treaties, especially regarding the limits of territorial waters. It developed from the geographical mile. The international standard definition is 1 nautical mile = 1,852 metres exactly.[1] There is no widely accepted international standard symbol for the unit nautical mile. The preferred abbreviation of the IEEE is nmi,[2] while M is used by the BIPM[1] and the maritime authorities of the USA[3] and Canada.[4] For aviation use, the preferred abbreviation of the ICAO is NM.[5] The abbreviation nm, though conflicting with the SI symbol for the nanometre, is also in widespread use. One nautical mile converts to
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