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→Statute Mile: ref
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 '''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. The US survey mile is therefore 3 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.
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 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==
==Nautical Mile==