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    Re: Angles without a protractor
    From: Lu Abel
    Date: 2012 Oct 12, 14:39 -0700
    Question:   Why use 3" and then multiply by 20?   Why not 6"  (or cm or whatever).   Then you'd only have to multiply by 10, also known as a simple decimal point shift.

    From: Robert Bernecky <bernecky@sbcglobal.net>
    To: NavList@fer3.com
    Sent: Friday, October 12, 2012 12:23 PM
    Subject: [NavList] Re: Angles without a protractor

    You said …drew an angle of 35°… I found it to be 34°…
    Out of curiosity, I was interested in the error in this simple approach. As you can see from the curve given in the attachment, you found exactly what you should have.
    Attached is a curve giving the correction to be applied to your calculated angle.
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