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    Re: Artificial Horizon
    From: Bill B
    Date: 2013 Jul 04, 15:54 -0400

    On 7/4/2013 12:56 PM, David Fleming wrote:
    
    > Then correct for refraction etc as appropriate.
    
    Sam
    
    If you superimpose the sun images, use the star refraction table.
    
    If you make the two images tangent to one another, a lower-limb sight is
    when the glass image is below the index mirror image, so use lower-limb
    refraction and vice versa.
    
    

       
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