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    Re: When did "time sights" fade away?
    From: Gary LaPook
    Date: 2011 Jul 19, 00:19 -0700
    Back in 1981 I programed my Texas Instruments SR-52 programable calculator to use the Sumner method for plotting an LOP. I input two latitudes, an approximate longitude, up to three sets of GHA, declination and Ho's and it returned the longitudes where the LOPs crossed the two latitudes. I liked plotting the LOPs this way since the charts I was using had the longitude tic marks along each parallel which made it easy to plot these points and no necessity of measuring an azimuth.

    gl

    --- On Mon, 7/18/11, Gary LaPook <glapook---.net> wrote:

    From: Gary LaPook <glapook---.net>
    Subject: [NavList] Re: When did "time sights" fade away?
    To: NavList@fer3.com
    Date: Monday, July 18, 2011, 11:40 PM

    We discussed this quite a bit in 2007. Go to:

    http://www.fer3.com/arc/sort2.aspx?y=200710su

    and look for Marc St. Hilaire.

    gl
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