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    Asymmetry in i.c.
    From: Igor S.
    Date: 2019 Jun 7, 18:30 -0700
    A few days ago I was determining index correction (i.c.) of my sextant (ASTRA IIIB) with the sun disc. I attached the flowing chart as a compilation of several Russian books on celestial navigation which I followed.
    I've done it several times and the results were the following:
    Turning drum in one direction gave me i.c. = +0.7' and in opposite direction i.c. = -0.3'. The difference is 1'  is quite big. I would expect a smaller difference.
    Should I worry about these results or just keep it in mind while taking sun sights?
    kind regards,
    Igor
    File:
    Flowchart_IC.pdf
       
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