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Re: C&P bubble sextant - practical issues
From: Tony Oz
Date: 2022 Mar 22, 04:27 -0700
From: Tony Oz
Date: 2022 Mar 22, 04:27 -0700
Are we talking about exactly this device?
If yes, then it is possible to zero-out all errors. The diagonal mirror looks adjustable - just as the mirrors on a sextant itself.
I'd started without the bubble attachment - and completed the usual sextant adjustments (the index mirror perpendicularity, the side error on the horizon mirror, the index error). Then - setting the index to zero, I'd adjusted the diagonal mirror in the attachment so that the natural horizon (when the sextant's index is at the zero) cuts the bubble through the center.
Warm regards,
Tony
60°N 30°E
