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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Drum Sextants
From: Alexandre Eremenko
Date: 2005 Jun 17, 11:08 -0500
From: Alexandre Eremenko
Date: 2005 Jun 17, 11:08 -0500
I have an SNO-T (which may be or may not to be super-quality). The drum is divided into whole minutes, and has no vernier (nonius). I have no difficulty in reading it to 0.1' precision. When I compared it with Bills Astra 3 (which has a nonius divided to 0.2') I did not find Astra easier to read. My impression is that reading the drum without nonius is quicker and more convenient than the one with a nonius. This might answer your question. P.S. Unlike all other modern sextants, SNO-T has a magnifying glass helping to read the drum. But no nonius. On Wed, 15 Jun 2005, Mike Burkes wrote: > I have always wondered why super quality sextants like some Plaths and others > do not have their minute scales further divided into tenths. > I would appreciate any feedback regarding that and thanks much! > Mike Burkes
