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    Re: Azimith forumula for Great Circle sailings- having problems
    From: David Pike
    Date: 2014 Dec 24, 15:10 -0800

     

    Sam.  I understand your frustration, but this is a seeing the wood from the trees situation.  Just stop for a breather for the moment, forget formulas, and start afresh.  The important thing is LHA has a direction to it; + is from east to west.  So if start is 39.58N 100.00W and finish is 41.44N 099.50W, Chlong is 10’E and LHA, if you want to use the term, is not +10’; it’s 359.50 or -10’.  Therefore, please post the actual longitudes.  Below are a couple of diagrams to show how formulas for solving the PZX triangle can also be used to solve spherical Earth problems. Dave

     



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