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Dan Allen wrote:

> nm is common but unfortunately also means nanometer, so I like using
> nmi as it cannot be mistaken for another unit.
>
> Dan
>
I had to look up the definition of a nanometer, a billionth of a meter.
 From a practical standpoint, it occurs to me that anyone likely to
mistake the two in a given context probably shouldn't be on the water in
the first place.

Carl

   

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