Changes

==Statute Milemile==In the reign of Queen [[Elizabeth I]] of [[England]], the mile was decreed by a Statute of Parliament to be 5280 feet long or 320 rods and is therefore known as a '''statute mile'''.<ref>http://www.unc.edu/~rowlett/units/custom.html</ref> This measure is still used mainly in the [[USA ]] and [[UK]]. There has been widespread resistance in [[America]] and [[Britain]] to use the metric system, which continues to this day.

The '''international statute mile''' was defined in 1960 as being 1760 yards (or 1,609.344 metres<ref>http://ts.nist.gov/WeightsAndMeasures/Publications/appxc.cfm#4b</ref>) long with one inch (1/36 yard) being set at exactly 25.4 millimetres. This means that 1 metre is 39.3700787 inches.

The '''US survey mile''' is defined in reverse, with 1 metre being equal to 39.37 inches exactly. <ref>http://ts.nist.gov/WeightsAndMeasures/Publications/appxc.cfm#footnote8</ref> The US survey mile is therefore 3 &nbsp;mm longer than the international mile at 1,609.347 metres. <ref>http://ts.nist.gov/WeightsAndMeasures/Publications/appxc.cfm#footnote11</ref> This unit of measurement is used by US Public Land Survey System.

==Nautical Mile==The '''nautical 1759 yards are one yard short of one mile''' is a geodetic measurement originally defined as 1 minute of arc measured along a meridian or great circle, or 1 minute of latitude. However, as we now know that the earth is not a perfect sphere the distance varies between 6067 and 6087 feet using the [[WGS84]] ellipsoid model, with an average of 6076 feet.

In Britain the ==Nautical mile==The '''Admiralty nautical mile''' was is a geodetic measurement originally defined as 61 minute of arc measured along a meridian or great circle,080 feet (or 1,853.184 m) which is approximately one minute of latitude in the latitudes of the south of the UK. In the United States, the nautical mile was defined in the nineteenth century as 6,080<ref>http://www.2 feet (1,853onlineconversion.249 m)com/faq_07. Some other countries had their own definitions of the nautical milehtm</ref> However, but it is as we now internationally agreed to be exactly 1,852 metres or approximately 6,076.12 feet. The international standard was adopted by know that the US in 1954 earth is not a perfect sphere the distance varies between 6067 and by 6087 feet using the UK in 1970[[WGS84]] ellipsoid model, with an average of 6076 feet.

The nautical mile is used mainly for maritime and aviation purposes because of its relation to In Britain the degrees of latitude. A '''knotAdmiralty nautical mile''' is used to describe speed in nautical miles per hourwas defined as 6,080 feet<ref>http://www. The term knot wordwebonline.com/en/ADMIRALTYMILE</ref> (1,853.184 m) which is sometimes erroneously used instead approximately one minute of latitude in the southern latitudes of the UK. In the United States, the nautical mile was defined in the nineteenth century as 6,080.2 feet (knot being thought a diminutive of nautical1,853.249 m). However, the name derives from the ancient practice Some other countries had their own definitions of throwing a log overboard with a knotted rope attachedthe nautical mile, but it is now internationally agreed to be exactly 1,852 metres or approximately 6,076.12 feet. The knots were made at fixed intervals and as the rope international standard was paid out adopted by the number of knots that passed through a sailor's hands US in a fixed time were counted to give a measure of 1954<ref>http://ts.nist.gov/WeightsAndMeasures/Publications/appxc.cfm#footnote12</ref> and by the speedUK in 1970. <ref>http://www.onlineconversionhemyockcastle.comco.uk/faq_07nautical.htm</ref>

As ships The nautical mile is used mainly for maritime and aircraft travel through a fluid medium their speed is relative aviation purposes because of its relation to the speed degrees of the water or air and may be referred to as "boatspeed" or "airspeed"latitude. Consequently there are several additional definitions of speed which are given in knots: A '''speed of a vessel over the groundknot''' is used to describe speed in nautical miles per hour. The term knot is sometimes erroneously used instead of nautical mile (SOGknot being thought a diminutive of nautical) describes . However, the speed name derives from the ancient practice of throwing a log overboard with reference to geographical location and '''velocity a knotted rope attached. The knots were made good''' (VMG) describes its rate at fixed intervals and as the rope was paid out the number of progress toward knots that passed through a distant pointsailor's hands in a fixed time were counted to give a measure of the speed.<ref>http://www.onlineconversion.com/faq_07.htm</ref>

==Metric Mile==A As ships and aircraft travel through a fluid medium their speed is relative to the speed of the water or air and may be referred to as "boatspeed" or "airspeed". Consequently, there are several additional definitions of speed which are given in knots: '''metric milespeed of a vessel over the ground''' is often used in international sports (athletics, swimming, speedskatingSOG) <ref>http://www.lowrance.com/Support/Glossary/glossary.asp#Speed-Over-Ground</ref> describes the speed with reference to denote geographical location and '''velocity made good''' (VMG) describes its rate of progress toward a 1500 metre eventdistant point.<ref>http://www.lowrance.com/Support/Glossary/glossary.asp#Velocity%20Made%20Good</ref>

==Metric mile==A '''metric mile''' is often used in international sports (athletics, swimming, speedskating) to denote a 1500-metre event.<ref>http://www.yourdictionary.com/ahd/m/m0258850.html</ref> ==Other Milesmiles==Other variations on the mile have been used by the Danish, Dutch, Finnish German, Irish, Italian, Norwegian Polish, Scottish and Swedish and could be from about 1 kilometre up to 12 kilometres in length.<ref>http://thelongestlistofthelongeststuffatthelongestdomainnameatlonglast.com/long265.html</ref>

<references/>{{Reflist}} [[Category:Units of Measurement]]