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In the United States, the term statute mile formally refers to the survey mile, [3] but for most purposes, the difference of less than 1 ⁄ 8 inch (3.2 mm) between the survey mile and the international mile (1609.344 metres exactly) is insignificant—one international mile is 0.999 998 US survey miles—so statute mile can be used for either.
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).
The world record in the mile run is the fastest time set by a runner in the middle-distance track and field event. World Athletics is the official body which oversees the records. Hicham El Guerrouj is the current men's record holder with his time of 3:43.13, [1] while Faith Kipyegon has the women's record of 4:07.64. [2]
Middle-distance running events are track races longer than sprints, ranging from 500 metres up to two miles (3218.688 metres). The standard middle distances are the 800 metres , 1500 metres and mile run , although the 3000 metres may also be classified as a middle-distance event. [ 1 ]
Race courses are usually held on the streets of major cities and towns but can be on any road. World Athletics recognizes eleven common distances for road races that are eligible to be counted for records if they meet the eligibility criteria: 1 mile (1,609.3 m), 5 kilometres (3.1 mi), 10 kilometres (6.2 mi), 15 kilometres (9.3 mi), 10 miles (16.1 km), 20 kilometres (12.4 mi), half marathon ...
Although most contemporary accounts used an Arabic mile of 6 444 feet (1,964 metres), which gave a Spanish league of the degree of 25,776 feet (7,857 metres or 4.242 modern nautical miles) others defined an Arabic mile as just 6,000 feet making a Spanish league of the degree 24,000 feet (or 7,315 metres, almost exactly 3.95 modern nautical miles).
[1] [2] There are 10 chains in a furlong, and 80 chains in one statute mile. [2] In metric terms, it is 20.1168 m long. [2] By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer.
Under Marcus Vipsanius Agrippa, it was standardized as the distance of two steps (gradūs) or five Roman feet (pedes), about 1.48 meters or 4 feet 10 inches. One thousand paces were described simply as mille passus or passuum, now known as a Roman mile; this is the origin of the English term "mile".