nautical mile

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nautical mile

1. a unit of length, used esp in navigation, equivalent to the average length of a minute of latitude, and corresponding to a latitude of 45?, i.e. 1852 m (6076.12 ft.)
2. a former British unit of length equal to 1853.18 m (6080 ft.), which was replaced by the international nautical mile in 1970

nautical mile

[′nȯd·ə·kəl ′mīl]
(navigation)
A unit of distance used principally in navigation; for practical consideration it is usually considered the length of 1 minute of any great circle of the earth, the meridian being the great circle most commonly used; the International Hydrographic Bureau in 1929 proposed a standard length of 1852 meters, which is known as the international nautical mile.

nautical mile

nautical mileclick for a larger image
Nautical mile.
A common unit for measuring distance. For most practical navigation purposes, all of the following units are used interchangeably as the equivalent of one nautical mile: (a) 6076.11549 ft or 1852 m; (b) one minute of arc of a great circle on a sphere having an area equal to that of the earth; (c) one minute of arc on the earth's equator, or 6076.10 ft (1851.9952 m); (d) one minute of arc of the meridian or one minute of latitude. This, however, varies between 1843 m (6046.58793 ft) at the equator, 1853 m (6079.3963 ft) at 45°N and S latitude, and 1862 m (6108.9238 ft) at the poles because the earth is an oblate spheroid. However, for the purpose of navigation, the International Nautical Mile of 1852 m (6076.1033 ft) has been adapted as the standard for air navigation.
References in periodicals archive ?
The island is located in the East China Sea and lies about 160 nautical miles south of the Japan-controlled Senkaku Islands, which are claimed by China and Taiwan, and called Diaoyu and Tiaoyutai, respectively.
This year, the Philippine armed forces is again keeping vigilant on Second Thomas Shoal, about 105 nautical miles off the coast of Palawan, where China has maintained a constant presence of at least two or three marine surveillance ships and a frigate.
The trawler named "Shadishna" was intercepted by a Fast Naval Patrol Craft attached to the Southern Naval Command, 06 nautical miles off Mirissa.
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Iker Martinez's crew started their fourth day of comeback more than a knot quicker than their rivals as they rode at the head of a weather front around 150 nautical miles south east of the frontrunners.
Under the Territorial Waters Act that took effect in 1977, Japan expanded its territorial sea limits to 12 nautical miles from the previously set 3 nautical miles (5.
Elies fractured his thigh bone and ribs when a large wave hit his yacht, the Generali, 850 nautical miles south of Western Australia.
Of particular interest is the Louisiana Offshore Oil Port, internationally known as the LOOP, located about 18 nautical miles south of Grand Isle.
The old Raider craft could travel 75 nautical miles whereas the SURC can travel for 250 nautical miles," said Staff Sgt James A.
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