NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bubble horizon
From: Paul Hirose
Date: 2002 Dec 18, 13:18 -0800
From: Paul Hirose
Date: 2002 Dec 18, 13:18 -0800
"Dr. Geoffrey Kolbe" wrote: > > To answer George Huxtable's question on the sort of accuracy one should > expect from a bubble sextant. I have a Link A-12 aircraft sextant (still > available from Celestaire, last time I looked,) and I would expect an > altitude measurement to be within +/- one minute. I am disappointed if I am > two minutes out and I cannot remember the last time I was more than two > minutes out. That is impressive. I have never done a serious accuracy test with mine, but I doubt I could match your performance. What are you shooting? Sun? Stars? Are you able to get batteries to fit the night illuminator? The ones I've tried are a shade too fat to go into the nose cap that holds the bulb. It seems C cell diameter has increased slightly since the 1940s, when the sextant was made.