A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Benjamin Bergmann
Date: 2017 Apr 11, 10:46 -0700
that is true. In practice that is not a problem.
I just thought that there might be some if (x>180) and (y<90) etc rule which would make the method 100% fool prufe.
Evan if you have a compas it is not allways 100% clear if you have to subtract z from 180 or add it to 90.