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    Re: Noonsite using artificial horizon? Did I do it correctly?
    From: Greg Rudzinski
    Date: 2014 Aug 25, 09:55 -0700

    Sam,

    1. Was the index error on the arc or off the arc?

    2. What was your Longitude ?

    3. How did you determine the time of LAN ? 

    No need to correct for semi diameter of the Sun when superimposing. Index error is applied to the artificial horizon sextant reading before dividing by 2 (not Hs). Refraction is subtracted from Hs not added.

    Greg Rudzinski

       
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