NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
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.
https://gregrudzinski.blogspot.com/2014/06/longhand-sight-reduction.html
Greg Rudzinski
From: Samuel L
Date: 2015 May 18, 17:36 -0700Hanno,
I tried a reduction using the Haversine method Greg lists (for Deneb) on his s/v Nightcap site (https://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.
