A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2018 Feb 20, 01:01 -0800
Thanks for all the comments!
As I'm creating the FB2 version of that book - I'll just use the proper "absolute value" operator (|x-y|) where necessary so that the text would be sensible/meaningful for everybody.
So far I find this book rather interesting, especially on the history side of the events.