NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bubble sextant intervention needed.
From: Brad Morris
Date: 2012 Oct 19, 11:56 -0400
From: Brad Morris
Date: 2012 Oct 19, 11:56 -0400
Agreed Geoffrey. The navigator is urged to permit the sextant to reach thermal equilibrium prior to observations, but I never recall seeing advice urging the navigator to do that by leaving the device out in the sun!
Best Regards
Brad
On Oct 19, 2012 11:51 AM, "Geoffrey Kolbe" <geoffreykolbe@compuserve.com> wrote:
At 07:23 19/10/2012, you wrote:
Geoffrey-
Well I'm not, really - but I was always taught that you need to leave a
sextant out to equilibrate with the outside temp before taking a sighting.
With respect Paul, I don't think you were ever taught to leave a sextant out in the sun! The great danger of that is that the silver scale jumps out of the frame and renders the sextant instantly and totally useless. X;{
Regards
Geoffrey