A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Gary LaPook
Date: 2015 Jul 12, 00:26 -0700
The cotan scale on my flat Bygrave is only 10 inches long by 7 inches high and I get 2 minute or better accuracy. The cosine scale is smaller. They each fit on standard 8 1/2 by 11 inch paper and clear plastic sheets.