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    Re: The Great Circle Challenge
    From: Henry Halboth
    Date: 2014 Dec 26, 14:36 -0500
    Dave,

    The way we used to do it. Attached are a few pages ftom my olde notebook which demonstrate the mathematical method once employed in caculating the Great Circle initial course, equator crossing, distance, and points along the track.

    Have fun,

    Henry

    On Fri, Dec 26, 2014 at 11:21 AM, David Pike <NoReply_DavidPike@fer3.com> wrote:

     

    The Great Circle Challenge

     

     

     

    Clearly, from recent posts, we all have a favoured way of solving great circle sailings (which we’ll probably never use for real).  Let’s put them to the test by trying something a bit more complicated like a southern to northern hemisphere crossing combined with a crossing of 180degrees E/W.  How about emulating Captain Cook by travelling from Cook Strait (CS), New Zealand to Waimea Bay (WB), Kauai, Hawaii?  Cook followed the pretty route, but we’ll go direct by great circle.  The coordinates are CS 41d 30’S, 174d30’E to WB 21d57’N, 159d 40’W.  Use your favourite method and report back on your answer, the time it took you, and any difficulties encountered.

     

    I’ll stick with the diagram method, because at least I’ll know what I’m trying to prove, and I won’t have as many rules to remember and apply which might or might not work.  Dave

     

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