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In radar -related subjects and in JTIDS, a data mile is a unit of distance equal to 6000 feet (1.8288 kilometres or 0.987 nautical miles ). An international mile is exactly 0.88 of a data mile. The speed of light is 983571056 ft/s, or about one foot per nanosecond. If it were exactly one foot per nanosecond, and a target was one data mile away ...
League (unit) A league is a unit of length. It was common in Europe and Latin America, but is no longer an official unit in any nation. Derived from an ancient Celtic unit and adopted by the Romans as the leuga, the league became a common unit of measurement throughout western Europe. Since the Middle Ages, many values have been specified in ...
Li. (unit) Map of the eastern South China Sea from 1588; each grid square is 400 li (about 133 km or 80 miles). Li ( Chinese: 里, lǐ, or 市里, shìlǐ ), also known as the Chinese mile, [citation needed] is a traditional Chinese unit of distance. The li has varied considerably over time but was usually about one third of an English mile and ...
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 entire yellow square is one square mile. The hectare ( / ˈhɛktɛər, - tɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100- metre sides (1 hm 2 ), that is, 10,000 square meters (10,000 m 2 ), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre.
The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised between the Commonwealth of Nations and the United ...
The square kilometre ( square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area . 1 km 2 is equal to: 1,000,000 square metres (m 2) 100 hectares (ha) It is also approximately equal to: 0.3861 square miles [2] 247.1 acres [3] Conversely:
A length of 100 kilometres (about 62 miles), as a rough amount, is relatively common in measurements on Earth and for some astronomical objects. It is the altitude at which the FAI defines spaceflight to begin. To help compare orders of magnitude, this section lists lengths between 100 and 1,000 kilometres (10 5 and 10 6 metres).