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    Corrections for use of artificial horizon at 1,000' MSL?
    From: Scott Statz
    Date: 2012 Mar 12, 23:33 -0700

    I live in Madison, WI, at about 960' mean sea level. I am teaching myself with the help of CELESTIAL NAVIGATION BY H.O.249 by John E. Milligan and am still working my way through the book. When using an artificial horizon, do I need to be concerned with a special correction for refraction (anything else at this altitude or in my circumstance)? I understand its not necessary at sea level and there are concerns when taking a sight at low angles.

    Thanks

    Scott


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