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    Re: GPS shortcomings.
    From: Jared Sherman
    Date: 2005 Jun 11, 11:22 -0400

    What I'd heard from many sources (which doesn't mean it is true) is that the
    Davis, and all plastic sextants, suffer more from thermal changes in the
    material than metal sextants. Supposedly taking it out from below decks and
    letting it heat up in the sun will throw the index error out more than it
    would with a metal sextant.
    
    But in theory a good navigator would allow a sextant to acclimate to
    heat/cold and then recheck the index error before using it. Perhaps it is
    bad habits that give it the bad rep?
    
    
    

       
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