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    Re: GPS shortcomings.
    From: Peter Fogg
    Date: 2005 Jun 9, 17:00 +1000

    > >>On Behalf Of Lu Abel
    >
    > Do you speak from experience or just theory about "plastic?"
    >
    When I've had the chance to examine them I've found them disconcerting to
    use - for example, the index error was different each time I checked on one
    instrument, before and after taking a sight. It didn't inspire confidance. I
    know and accept that they have been used to cross oceans with, and possibly
    they are ideal for the task of teaching students.
    
    
    

       
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