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    Re: Plastic sextants. was: GPS shortcomings.
    From: Carl Herzog
    Date: 2005 Jun 9, 16:26 -0400

    George Huxtable wrote:
    >I'm rather surprised that John Kabel experienced such large errors, when
    >using his Astra from a beach (about 50 % within 3 miles). Was this
    >shot-to-shot scatter? How repeatable was a series of repeated shots at
    >close intervals? It could be explained by days of anomalous dip, but a 50%
    >frequency seems absurdly high. Does John have an explanation?
    I'm curious too. Results like that do not reflect the inherent
    capability of the sextants. I've never had results that bad with either
    a plastic Davis or a metal Astra underway on any size vessel. I've never
    tried shooting anything from the shore, so I don't know what other
    factors may confound accuracy there, but it seems like something else is
    wrong in this case.

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