NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Eclipse of August 21st, 2017
From: Don Seltzer
Date: 2017 Aug 22, 15:19 -0400
From: Don Seltzer
Date: 2017 Aug 22, 15:19 -0400
With all the warnings about using only ISO approved glasses to view the sun, I wonder how they made filters for sextants 200 years ago. I assume that they provided sufficient protection or historical records would show an extremely high rate of blindness among young naval officers. Don Seltzer
