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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Visiting local museum and CN-items
From: Igor S.
Date: 2019 Dec 19, 00:53 -0800
From: Igor S.
Date: 2019 Dec 19, 00:53 -0800
Thank you Alex! I found a photo on internet of a complete device (see the photo attached).
The old sextant (Fig 3) might be one from J.D. Potter instrument maker https://www.bidsquare.com/online-auctions/skinner/j-d-potter-anodized-brass-sextant-784263 which is very similar.
Igor.
Re: Visiting local museum and CN-items
From: Alexandre Eremenko
Date: 2019 Dec 18, 09:09 +0000Fig 1 seems to be a part of a dead reckoning calculator (you enter the course, drift speed and time and it gives your position with respect to departure point. The device seems to be incomplete. Fig 2. is an "altitude and azimuth instrument", also called "universal instrument". It is used in geodesy, but cannot be used from a ship at sea. It is similar to theodolite but the mounting permits to point it at zenith. Fig 3. is an old sextant, probably 2-nd half of 19th century Alex.
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