A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Francis Upchurch
Date: 2015 Nov 13, 00:19 -0800
I think I was just confusing things with the RBA cos equation. With the BN, I can find unknown LHA, with known dec, lat and Hc by going "backwards." So the question is, can we do that with the de Man graphical cosine method to find unknown LHA?