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    Re: Graphically solving haversine calculation
    From: Francis Upchurch
    Date: 2015 Nov 13, 00:19 -0800

    Jaap,

    I think I was just confusing things with the RBA cos equation. With the BN, I can find unknown LHA, with known dec, lat and Hc by going "backwards." So the question is, can we do that with the de Man graphical cosine method to find unknown LHA?

    Thanks.

    Francis

       
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