A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Randall Morrow
Date: 2014 Nov 15, 15:40 -0800
I have used my phone GPS coordinates and I'm pretty sure I read them correctly. Almost all the sights were made with a mirror artificial horizon and a pair of 10 second spirit levels. I do tend to use each in the same orientation night after night, but the pattern holds even with sights only a few tenths of a minute off the USNO data. I do not reverse the level direction because the calibration is so close it doesn't seem to matter. Azimuths vary since my AH Does not limitthe direction I can shoot.