NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2009 Feb 27, 09:22 -0500
Hi Bill
Bygraves (and their cousins) appear from time to time on eBay.
You will be competing with slide rule collectors, militaria
collectors and celnav aficionados. Be prepared to spend a lot of
cash.
Slide rule collectors like this, the Fuller and other
cylindrical rules like the Otis King. Cylindrical rules command high prices
but come with the advantage of increased accuracy, due to the length of the
scales.
Militaria collectors, like http://www.atlantik-pirat.com/Der%20Atlantik-Pirat.htm
, treasure these high end instruments for the history involved. They
are spectacular.
Of course, celnav aficionados want it to reduce the drudgery of
hand computation or for the backup celnav system. They un-questionably
provide the solution to the navigational triangle, providing an answer in very
rapid time. When you compare HO229 with the Bygrave, you save time and space
(a complete set of HO229 is massive compared to a Bygrave). What you lose
is some accuracy and some resolution, something not particularly relevant for a
backup navigational system.
The LaPook-Bygrave is considerably cheaper, there is no
comparison whatsoever. An antique Bygrave will cost you a fortune, the LaPook-Bygrave
almost nothing!
Best Regards
Brad
From:
NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of William
Sellar
Sent: Friday, February 27, 2009 8:47 AM
To: NavList@fer3.com
Subject: [NavList 7452] Re: New compact backup CELNAV system
I am mostly a lurker on this list. I am a beginning
cel navigator and may be the person that Gary created this for - a voyaging
sailor who is interested in Celnav primarily for backup to electronic
navigation. While I cant say that I have figured it out, I have printed
out the material that Gary provided and I feel that I will be able to use
it. Well done Bravo.
Are there Bygraves on the market? I have not found
any.
Bill
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