Re: Bubble horizon
Subject: Re: Bubble horizon
From: Paul Hirose (paulhirose@XXX.XXX)
Date: Wed Dec 18 2002 - 16:18:42 EST
"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.
