A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: John Brown
Date: 2016 Dec 5, 03:00 -0800
Gary wrote: OK, I understand the MX gauge point but what are the S1 and the P scales used for?
The S1 scale is a scale of sines reading from 0 to 90 degrees from left to right and, in brackets, from 90 to 180 degrees reading from right to left.
The P scale is for values of SQRT (1-x^2) - a trig identity I would need to look up, but possibly used in the integral calculus.