A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2016 Dec 8, 00:42 -0800
I realize that most off the time (now in the winter here in europe) I use both filters together on the A-12 sextant.
Then it is dark enough and still a sharp sun.
Perhaps I must compare the darkness off the A-12 filters with one other sextant?