A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Geoffrey Kolbe
Date: 2020 Feb 18, 08:56 -0800
I have been down this route of looking for the smallest bubble sextant. I suspect you will find the A-10 not as ergonomically friendly as the A-12. The A-10 has an awkward shape and (as far as I can see) the batteries are in an external tube, connected to the instrument by a cable and not shown in the picture, rather than having internal batteries as with the A-12. The A-12 seems to be about the thinnest of the bubble sextants, and for that reason is a lot easier to carry about than other bubble sextants.