NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brian Walton
Date: 2015 Jul 3, 01:17 -0700
Hello,
There is no need for electronics in generating a plotting sheet. Use the ruled paper you already have on board in your sight book, or log book, and construct your own. This is surely more appropriate to Haversine/Doniol followers. See attached images of 2 recent voyages, one close to Andres' Basque Country. Eminently suitable for low-tech yacht trips.
On the use of the Haversine/Doniol method, Admiral Doniol's formula is not obscure, but seems to be a development of the French "lunes" work used by d'Ocagne to produce his nomogram, also described in Bowditch. He must surely have been aware of d'Ocagne's brilliant simultaneous equations using Lat +/- Long. Perhaps Antoine, ( a la Chasse, bordel! BA314 Tours, M IVA) might comment. If you want minimum mathematics, the d'Ocagne diagram used in Long by Chrono mode is a good way to go. See attached image of a suitable nomogram on my boat,
Brian Walton
