NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Beginner
From: Espen S. Ore
Date: 2005 Sep 18, 15:17 +0200
From: Espen S. Ore
Date: 2005 Sep 18, 15:17 +0200
First a correction: I ment 1-2' and not 1-2". Yes, the Mark III has a vernier scale. But it is in certain places along the scale easier to do fine adjustments one way than another. Actually the most precice measurments are probably when the sextant is set a little to high or low (depending on the time) and then kept until the sun moves up or down to that height. Espen Herbert Prinz skrev 17.09.2005 04:00: > The Davis Mark 3 has a Vernier scale. I don't understand why it should > make a difference wich way you move the index arm before reading. This > is only a concern with micrometer drums. > > Herbert Prinz > > > > Espen S. Ore wrote: > >> Given the way the Davis Mk. III works I believe it is >> difficult to come any closer than 1-2", and that yes, one should move >> the arm in the same direction for all the shots. > >
