A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: John D. Howard
Date: 2015 Aug 18, 17:18 -0700
Why is the "true" prime merideian any more true the the "real" prime meriderian? In the past the zero point was whereever you made it. If the UK passed a law that the line at Greenwitch is zero than it would be. Why cannot the GPS be adjusted 100 m to aline with Greenwitch
How would the local gravity, geiod, et-all change if everything was shifted to make Greenwitch zero?