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    Re: Calculator v. Slide Rule for Ex-Meridian Correction
    From: Brad Morris
    Date: 2016 Jan 3, 11:25 -0500

    Hello Alex

    Glad to see you!

    There has been some discussion of performing the lunar distance computation with a slide rule.  What is your estimate of the number of significant digits for the lunar distance computation?


    On Jan 2, 2016 4:42 PM, "Alexandre Eremenko" <NoReply_Eremenko@fer3.com> wrote:

    This kind of calculation requires few significant digits, and thus can be done with a slide rule. You can also time how much it takes by hand with pencil, as it was done in the old times, without a calculator and without a slide rule. However the main calculation which we do in CelNav, solving a spherical triangle, requires 5-6 digits, and this is not possible with a slide rule. Perhaps for this reason a slide rule is not in the list of standard equipment for a celestial navigator.

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