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    Re: Correct way to calculate time of LAN?
    From: David Fleming
    Date: 2017 Feb 6, 20:25 -0800

    You are having trouble with E and W longitude.  Simplest would be to figure GHA for your DR.

    ie  If DR is 175d 5.2m E then you are at 180d + (180d -175d 5.2m) of GHA

    or 180d + 4d 54.8m = GHA ( 184d 54.2m)

    Look for largest GHA less than that in Almanac and use increments to find time past amanac entry required to make up the differenc in GHA from almanac to where you are.

       
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