[GeoStL] Intermediate GPS lessons?

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Are there ever any events for learning more about the more technical things on 
a GPS or even about how PDAs work and how to use one for geocaching?
I haven't a clue about what all a PDA does and know that alot of cachers use 
them.  I am sure I am not the only one out here that knows nothing about a PDA. 
 I might want a PDA if I knew how it works.

Or how to project waypoints, or even on some caches it will say go so many 
degrees in a certain direction from a certain waypoint.  I would like to learn 
some of this or all that I can.

So are there ever any events that tells more than just very beginner lessons?  
I know the beginning basics, but not other more techinal things.

Thanks,
Jen

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