A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2018 Jan 24, 01:29 -0800
Dear Paul, and everybody commented,
Thank you very much!
Now my opinion on the "reasonable sufficiency" has a solid base - the table gives good credibility the the simple formulas from the Umland's book. They are certainly "good enough" in case of emergency/disaster.
PS: Downloaded most of the referenced books - reading and learning now. Thanks!