A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Lars Bergman
Date: 2021 Nov 2, 14:01 -0700
DaveP, yes, for practical navigation you do not need these formulas. What you need is the new initial course from your current position to your intended destination, and maybe it could be interesting to see the remaining distance.
you may find a slightly different view of great circle versus rhumb line sailing, which might amuse you.