NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Astra IIIB
From: John Simmonds
Date: 2001 Apr 24, 8:35 AM
From: John Simmonds
Date: 2001 Apr 24, 8:35 AM
a shallow pan of mercury is perfectcheers, John At 21:34 23/04/2001 -0700, Yves Arrouye wrote: > > The practice bubble horizon is difficult to use. There is no > > magnification. > > The slit aperture makes me see double of the reference line > > in the sight. > > Combine that with trying to hold the sextant steady so the bubble is > > centered while adjusting the sight ... it can be frustrating. > >I know, I tried it. What's very frustrating is how any small movement makes >the bubble go away. But then, I didn't seem to have much success with a pan >of water in my garden either. Maybe oil would be better? Anyway, the bubble >horizon is on order, and I'll see what my first sights will be. Not good I >imagine... > >YA