A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2018 Nov 2, 15:25 -0700
Bill Lionheart You wrote: Can NavList members give a practical example where you might take sights for three or four bodies (average of several sights for each) and suspect that one of them is say half (or some other fraction) as accurate as the others?
How about every navigator’s dream, a Sun, Moon, Venus fix? It’s not available very often, but when it is, you’d have time to get the shots in. The Sun would probably be low, so atmospheric refraction might be difficult to calculate precisely, which would affect the band of error. Also, some navigators never seem to get on very well with the Moon, so that might have an effect. Of course, confusing Venus with a police helicopter hovering or an aircraft on very long finals would really upset the applecart. DaveP