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    Re: cheap Davis sextant
    From: Joe Shields
    Date: 1999 Jul 27, 1:44 PM

    Here is my 2 cents worth on the cheap Davis sextant (Mark 3,  $27-30):
    I bought one after being sorely disappointed with the contraption I
    built with copper tube, protractor, fishing line and sinker.  With the
    Davis Mark 3, I was able to teach myself Celestial Navigation well
    enough to greatly amuse myself for these past 11 years (and challenge
    the ASA Certification Celestial Nav. exam -- [passed with 92%]).  Every
    weekend morning when the sun is shining (and noon in wintertime when the
    sun is low enough), you will find me checking my position (Lat 40d34'
    Long 80d04') by shooting the sun using my sextant and artificial
    horizon.  I find that if I take 4 quick shots in a row - derive an
    average time and height from them and then reduce the average (using
    H.O. 211), I am consistently within 2 nm.  Individual readings however
    will typically vary +/-5 nm.   I want a metal sextant so bad I can taste
    it, however, if placed in a situation where I had to navigate
    celestially and only had my cheap plastic sextant to rely on,  I'd be
    all right with that.
    -- Joe Shields

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