A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ed Popko
Date: 2019 Feb 18, 11:51 -0800
Thanks for finding an image. The CPU50A/P is certainly more sophisticated than the CP-300/U.
My first reaction to the green plate (not a part of the CP-300/U) is it might be related to the Equation of Time? It has that sort of lazy 8 spread out look to it. Just a wild guess.