Another navigational detail...
Further to my last post... For anybody who is interested, if a navigator needs to measure a distance of less than one nautical mile it still does not matter whether you normally use metric or Imperial for other purposes. You just use decimals...
So for instance you would measure the distance on the chart to your next waypoint, and write down "1.2 NM." You would never use yards, feet or metres on the chart (except for water depth measurements, or elevation of features on land).
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