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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Classic Trig Log SR with Ageton Pub 211
From: Hewitt Schlereth
Date: 2015 Jul 23, 09:44 -0700
From: Hewitt Schlereth
Date: 2015 Jul 23, 09:44 -0700
Greg, kudos once again, though Doniol is a tough act to follow. :-)
Hewitt
PS For those of us who like old-timey ways of doing things, as part of Commonsense Celestial Navigation I made a 45-page sin/cos table that has the logs in the middle columns and corresponding natural functions on the flanks. This was my first stab at reducing sight reduction tables, which ended up twenty years later with a very compressed HO 229. H
The Ageton table was designed to solve the split spherical triangle using log secants and log cosecants multiplied by 100,000. This same Ageton table can be used to solve the classic spherical triangle by substituting log cosecant for log sine and log secant for log cosine. The benefit will be the simplification of summed logs. The Ageton table lists log cosecant in column A and log secants in column B. Example SR attached.
Greg Rudzinski
Attached File:
(Classic-SR-by-Ageton.jpg: Open and save)
