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    Re: Another Davis Instruments Mark 15 Question
    From: Ken Gebhart
    Date: 2003 Mar 1, 15:38 -0600

    Davis has always stated that no specific accuracy is implied (as compared to
    metal sextants). I suppose this means that if the sextant is put on a testing
    machine, results will differ with temperature, and maybe even time.  The
    consensus among many people is that  observations will fall within 3 minutes
    of true if the operator is experienced and checks the IC before and after
    every shot.  Among inexperienced and/or careless operators, errors around 5
    min. are reported, and in some extreme cases 10 - 13 mi nutes.
    Ken Gebhart
    George Istok wrote:
    > I have been corresponding with someone at Davis Instruments who has just
    > informed me that the accuracy rate of the Mark 15 sextant is +/- 5 degrees.
    > I am hoping there is a typo somewhere in his message.  Also, I am not sure
    > what accuracy rate means.  Even though the sextant is plastic, low cost,
    > etc., surely it has better accuracy than 5 degrees.  Any thoughts?
    > George Istok
    > Senior Consultant
    > Signal Hill Consultants, Inc.

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