A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2018 Nov 26, 07:07 -0800
The benefit of 3 or 4 LOPs that are seperated by 120° or 90° is that systematic errors are opposing thus systematic errors cancel on the plot no matter the size of the cocked hat or rectangle. Also the 3rd LOP serves as a check against a gross error on the other two.