A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Date: 2016 Dec 23, 03:21 -0800
You haven’t missed anything. But I did. I use “centre coincidence ” when taking AH sun sights and had forgotten the other possibility, “limb touching”, though I now remember having read about it. I don’t know which to prefer. John Karl (Celestial Navigation in the GPS age) describes only the first method. Bowditch, 1958 and 1977, both.
Thanks to Brad and Stan for clarifying messages.