Meters
1 m is equivalent to 1.0936 yards, or 39.370 inches.
Since 1983, the metre has been officially defined as the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second.
nl =
m * 0.00017999
Nautical Leagues
A nautical league was 6,080 yards - or three nautical miles (each league being 6,080 feet). Note that there also US Leagues, UK Leagues and UK Nautical Leagues which all differ.
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