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A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).
Legua nautica (nautical league): Between 1400 and 1600 the Spanish nautical league was equal to four Roman miles of 4,842 feet, making it 19,368 feet (5,903 metres or 3.1876 modern nautical miles). However, the accepted number of Spanish nautical leagues to a degree varied between 14 1/6 to 16 2/3, so in actual practice the length of a Spanish ...
1 nautical mile per hour (by definition), 1 852.000 metres per hour (exactly), [5] 0.51444 metres per second (approximately), 1.15078 miles per hour (approximately), 20.25372 inches per second (approximately) 1.68781 feet per second (approximately). The length of the internationally agreed nautical mile is 1 852 m.
kilometre (km) or kilometer is a metric unit used, outside the US, to measure the length of a journey; the international statute mile (mi) is used in the US; 1 mi = 1.609344 km; nautical mile is rarely used to derive units of transportation quantity.
The outer limit of a country's continental shelf cannot stretch beyond 350 nautical miles (650 km; 400 mi) of the baseline or beyond 100 nautical miles (190 km; 120 mi) from the 2,500 metres (8,200 ft) isobath, which is a line connecting the depths of the seabed at 2,500 meters.
In March 2009, the CLCS accepted Mexico's arguments for extending its continental shelf up to 350 nautical miles (650 km; 400 mi) into the Western Polygon. Since this would extend Mexico's continental shelf well into territory claimed by the United States, Mexico and the United States would need to enter a bilateral agreement based on ...
[6]: 3 Docking occurred about 216 nautical miles (400 kilometers (250 mi)) above Lake Baikal region of the Russian Federation. The Orbiter Docking System (ODS) with Androgynous Peripheral Docking System served as the actual connection point to a similar interface on the docking port on Mir's Kristall module.
Vietnam claims an exclusive economic zone (EEZ) of 1,395,096 km 2 (538,650 sq mi) with 200 nautical miles from its shores. [90] [91] These figures do not include the claimed EEZ areas of the Paracel Islands and the Spratly Islands. Vietnam has disputes mainly with the People's Republic of China due to the nine-dash line.