NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant accuracy (was : Plumb-line horizon vs. geocentric horizon)
From: Alexandre Eremenko
Date: 2005 Feb 12, 10:36 -0500
From: Alexandre Eremenko
Date: 2005 Feb 12, 10:36 -0500
Frank, On Sat, 12 Feb 2005, Frank Reed wrote: > Alex, you wrote: > "after long practice I can achieve 0.2 to 0.3 accuracy most of the time, > with my 7x scope, both for lunar and star-to star distances." > > Interesting. I remember you were puzzled by the star-star distances a couple > of months ago. Are you saying that they have finally fallen in line to your > satisfaction? Well, I said "most of the time". It still happens that I get bigger errors of 0.5 or 0.6. So the satisfaction is not complete. On your earlier message today on the human eye resolution. I think it is more complicated than that. "Resolution" is the ability to see two point sources apart. But frequently I see two stars collided in one spot, (so I already cannot tell them apart) but still understand that this collision is not perfect. Then I try to make this "spot" as small as I can. I believe that a human eye can be trained to increase this ability. If you look at the marksmen results (with a rifle, with no optical sight) you can conclude that the human eye ability to aim a rifle is better than 1'. Alex.
