A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Feb 12, 18:07 -0800
A sextant ghost ring aperature will be the quickest way to get a scopeless sextant observation ready. Fabricate out of white or black plastic. My dock neighbor made one that worked very well on his Freiberger. See diagram. A short plastic tube can also be fitted to make a sight tube if desired. After market sight tubes fit the Plath and Tamaya but may not fit the Freiberger because the V slot is different.
P.S. Be careful when adjusting out index error. Check Bill Morris' blog on this.