NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Link A-12 Bubble Sextant - Bubble chamber replenishment
From: Sean Miller
Date: 2026 Sep 21, 04:18 -0700
From: Sean Miller
Date: 2026 Sep 21, 04:18 -0700
Good afternoon
I am trying to find the correct Bristol spline key to service the bubble chamber for the A-12 Bubble Sextant. There are lots available in the United States, not so in the UK - do you have any suggestions please?
Apparently the set of keys is Bristol SS-508.
As regards using a bubble sextant in a light aircraft, we have had good results (3 statute miles in daylight) with a Piper Cub. It's much easier if there are two of you.
Thank you for your assistance.
Sean Miller
