A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2015 Dec 28, 11:48 -0800
Any idea how long the A-12 bubble chamber keeps the xylene in, if it is properly sealed?
I have one A-12 bubble chamber with een small screw that has a beveled point in the
bubble chamber there is a beveled drilling that fits the point. It has a normal head for
flat screwdriver. The other bubblechamber has the standard screw with ball.
One other question about the A-12.
There are two filters for the sun, a light and a darker filter.
The problem I have is, that the first filter that can be used, is the darkest filter then the lighter
filter. I think they are mounted reverse?
The former owner must have fiddeled with the sextant, because it is about 13 degrees to low on the scale.
I think I have to disassemble the sextant to solve this problem?