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    Reeds versine formulas
    From: Örjan Sandström
    Date: 2019 Apr 15, 06:52 -0700

    Anyone know what formula is used in "Reeds Astro Navigation Tables"? Versines and ABC for azimuth* is all I have found out by web search.
    But versines are used in several formulas, and usually with sines or cosines...
    versines can be "forced" into in most formulas with a bit of math, not much help in other words.


    *I prefer the quick diagram by Hanno Ix

       
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