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    Re: body not aligned with reflection in artificial horizon
    From: Alexandre Eremenko
    Date: 2007 Nov 26, 20:17 -0500

    
    David,
    
    > On Nov 23, 2007, at 3:52 PM, landlocked wrote:
    
    > > Have I not corrected enough for perpendicularity?  What
    > > other error might this be?
    
    In the list of the errors you corrected, you did not
    mention collimation error. On many modern sextants
    it cannot be corrected (except by hummering the fork:-)
    but still it is recommended to check it.
    
    Alex.
    
    
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