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    Re: Finding IC for A-12 bubble sextants
    From: Geoffrey Kolbe
    Date: 2021 Oct 9, 00:56 -0700

    Art Leung said: "I am still learning how to best manage the centering of the object in the bubble. "

    It takes practice. Do not try to to invent sophisticated strategies to improve your results, it is a skill that requires repetitive training.

    Years ago, I was a competitive target shooter at international level, so centering one circle inside another circle was something I spent a lot of time practicing. It is a skill that is useful in using the A-12 sextant. I am sure you will find that the more you try it, the better you will get. 

       
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