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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Reeds versine formulas
From: David McN
Date: 2021 Nov 12, 10:51 -0800
From: David McN
Date: 2021 Nov 12, 10:51 -0800
Zenith distance = cos(Lat)*cos(Dec)*ver(LHA) + ver(Lat+/-Dec)
[For the 2nd term above, remember ADD - that is, add if different, subtract if same name]
Hc is 90 - ZD.
Reeds give tables of log cos and log ver to facilitate the calcs. It is very simple and easy to use. Plus the book is small - an alamnac and sight reduction table all in one slim volume. Brilliant.
