A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2021 Jul 5, 07:33 -0700
Here is what Bowditch has to say about twilights and horizon. I will add that a bright star or planet should be observed first after sunset and last before sunrise. Precalculating a round of stars will help maximize observational opportunities.