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    Re: Breed's Graphical Navigation
    From: Hanno Ix
    Date: 2015 Feb 26, 21:34 -0800
    Kermit,

    Breed's idea is to construct a tetrahedron T(pole, GP,  AP,  Earth's center ),
    then to unfold it . With that, all sides may be spread into one plane, and all components can be measured.

    If you were to cut the drawing out of the page and fold / glue it back together again you could actually hold it in your hands. It would be an impressive show to model this process with a precision CAD, wouldn't it?

    H

    On Thu, Feb 26, 2015 at 8:51 PM, Antoine Couëtte <NoReply_Couette@fer3.com> wrote:

    RE: g30482

    Hello Hanno,

    "Navigation without Numbers" seems a very interesting book.

    The quoted example is very interesting: with L=41°, D=39° & T=105°, compute H=15°08.0' (with Z=309°), while the "hand drawn" value for A shows 75°, which would translate into H=15°, I would assume.

    This drawing is fascinating. I need to study it in more detail.

    Kermit


       
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