A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gord Cudlipp
Date: 2018 Oct 26, 11:05 -0700
I recently acquired a Davis Mark 15 sextant but this sextants is a little different than other Mark 15s that l have used. It has a small lens that folds over the clear portion of the horizon lens. I have attached a picture of the sextant. Can anyone tell what this lens is for?