A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Noell Wilson
Date: 2021 Jul 11, 06:53 -0700
It sounds like a ball recording sextant. I think balls were dropped onto a pressure sensitive paper that recorded a mark. The ball pattern was averaged to get a reading. From what I’ve read, it didn’t work well in practice and was not widely used.
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