A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David C
Date: 2021 Feb 20, 13:57 -0800
I'm looking for a formula, for an All-Haversine one, which I enter with the Lat, Dec (or LatDest) and dLon to obtain - in one go, no matter how long or complicated, - the initial azimuth.
In another thread I boasted that I had all three volumes of the Amiralty Manual of Navigation 1938 so I decided to check the ADM. Here are five pages from 1938 volume 2. This is the volume that reached me despite covid. I have not checked the maths but it may be what you want. The equation is not All Haversine - is there such a thing?