[Proj] Terminology: what should I call 60 nautical miles?

Christopher Barker Chris.Barker at noaa.gov
Mon Apr 27 11:28:48 EST 2009

Gerald I. Evenden wrote:
> Its purpose was probably for the navigator to always 
> have a handy scale at the left or right edge of the chart for measuring 
> his/her course.
> For some unknown reason it is still used by sea/air navigators.  Must be 
> retained as a link to the romantic history of travel.  Certainly has no other 
> legitimate usage.

I use it all the time: is that "handy scale at the left or right edge of 
the chart" no longer a legitimate usage?

It's certainly more useful that the statute mile!

I agree that there really is no need for a special name for 60nm -- If I 
want nm, I use nm, if I want degrees of latitude, I use degrees of latitude.

Having said that, I do have an entry in my personal unit converter for 
degrees of latitude as a distance (defined, for that purpose as 60nm)



Christopher Barker, Ph.D.

Emergency Response Division
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Chris.Barker at noaa.gov

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