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    Re: Haversine- how to derive it?
    From: Greg Rudzinski
    Date: 2015 May 18, 19:05 -0700

    Sam,

    There are several ways to get azimuth. Direct with hand bearing compass corrected to true, Rust diagram, Hanno Ix diagram (attached), slide rule, or Doniol haversine azimuth formula. I use a direct bearing by compass as a check on the Ix diagram and or slide rule calculation. 

    http://gregrudzinski.blogspot.com/2014/06/longhand-sight-reduction.html

    Greg Rudzinski

    From: Samuel L
    Date: 2015 May 18, 17:36 -0700

    Hanno,

    I tried a reduction using the Haversine method Greg lists (for Deneb) on his s/v Nightcap site  (http://gregrudzinski.blogspot.com/)

    I deteremined Hc with not too much trouble but can't figure out how to calculate Zn. He shows 360d - 16d= 344

    Would you, or Greg, please explain how to determine Zn....in very simple terms?

    Thank you,

    Sam L.

     

     



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