NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bowditch sightreduction table (Ageton?)
From: Paul Hirose
Date: 2012 Apr 08, 13:11 -0700
From: Paul Hirose
Date: 2012 Apr 08, 13:11 -0700
Örjan Sandström wrote:
> I am referring to My grandfathers 198X version (one book). it had if memory
serves a Ageton like sight-reduction table, or am I wrong?
You are correct. American Practical Navigator ("Bowditch"), Volume II,
1981 edition, contains Table 35, "The Ageton Method". There are also
instructions and a sight reduction example.
In those days there were 2 volumes. The main book was Volume I (1984),
1414 pages. Volume II (1981), was "useful tables – calculations –
glossary of marine navigation", 961 pages.
Of course the "real" Ageton Method was published by itself as HO
Publication 211. There are always several on eBay:
http://www.ebay.com/sch/i.html?_nkw=dead+reckoning+altitude
Several variants on Ageton have been published. One was by Davies (?),
which I own, and there is also the S-Table by Pepperday, currently sold
by Celestaire.
--
