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    Using sun compass for calibrating boat compass
    From: Bill B
    Date: 2014 May 7, 10:34 -0700

    When reducing a sight one would traditionally compute the Hc, then the azimuth from the Hc (although the azimuth can be computed directly without the Hc).

    This is fine for plotting an LOP, but it raised a concern for me. Is the azimuth I obtain for the celestial object tied to its Hc, rather than its observed position with refraction?

    Perhaps the accuracy of a shadow sun compass (as opposed to a William Burt solar compass )on a light to medium displacement sail craft is such that it is a moot point?
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