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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Buying a sextant- a cautionary tale.
From: Alexandre Eremenko
Date: 2006 Apr 30, 18:08 -0400
From: Alexandre Eremenko
Date: 2006 Apr 30, 18:08 -0400
George, In a previous message I suggested some alternative to displacing the index method. How large is the area on the arc that you cannot read? Alex On Sun, 30 Apr 2006, George Huxtable wrote: > > Frank wrote- > > | By the way, as a hypothetical, how could you use a sextant with a dead > | section, from whatever cause, close to zero degrees? The sextant would certainly > | be a nuisance, but it would still work. > > I'm not sure. I can see that displacing the zero position of the sextant to be on the working part of the arc, by misaligning the > adjustments of the mirrors, might work, depending on the range of adjustment that was available. I doubt that would work, with the > instrument that I tried, because its blank-area was so wide. Does Frank have a cleverer method, that would work with a Vernier > instrument? > > George. > > ============ > > contact George Huxtable at george@huxtable.u-net.com > or at +44 1865 820222 (from UK, 01865 820222) > or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. >
