I am forwarding this reply from a botanist on the staff here
          at the New York Botanical Garden who has been using GPS in
          his field work.
 
 
Hi Eric:  The GPS unit I've been using is a GARMIN GPS 75 and will capture
either lat./long. or UTM's depending on how you set it up.  Whether one set of
measurements is any better than the other, I don't know.  Some topo maps I've
been using in Costa Rica don't show UTM's, but they do have the lats/longs.  Is
this any help?
 
If you want to discuss it in more detail, email me off the list, and I
          will forward the email address of this botanist. I am
          reluctant to put this person's name on a public posting,
          since I'm not sure that he would welcome alot of inquiries.
 
                                         Eric Siegel
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