On 16 December 2012 12:06, Mark Wendt <wendt.m...@gmail.com> wrote:

> Hmmm, back when I was flying F-4's for Uncle Sam, our charts were all
> done in nautical miles.

Well, the Nautical Mile is a rational unit, so seems likely to stay.
All the charts I have used have had distances in nautical miles and
depths/heights in metres.

Nautical Miles correlate directly to latitude and longitude positions,
so are probably here to stay.
(a switch to decimal units of angular measure would probably mean that
the km became the rational choice)

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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