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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: When did "time sights" fade away?
From: Gary LaPook
Date: 2011 Jul 19, 00:19 -0700
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@pacbell.net> wrote:
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