Millimeters
The millimetre is a unit of length in the metric system, equivalent to one thousandth of a metre (the SI base unit of length).
nl =
mm *
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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