NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sight reduction method history
From: Hewitt Schlereth
Date: 2013 Nov 3, 11:03 -0800
From: Hewitt Schlereth
Date: 2013 Nov 3, 11:03 -0800
Paul, I remember that edition (dark blue cover). Gave my copy to the library when I sold my house. Did not remember it being so long, but do remember D'Ocagne's logarithmic graph for solving Nav triangle and actually had a copy (it was about 30" square) back then.
Another artifact I sometimes wish I'd hung onto. :-)
Hewitt
Sent from my iPad
Sent from my iPad
Hewitt Schlereth wrote: > Lu, older editions of Bowditch have a 15-page chapter "Comparison of Various Methods of Sight Reduction." It's a chronological listing of the various sight reduction methods. It's expanded to 61 pages in the 1984 edition. The title should have said "history and comparison" since the chapter describes many old and now obscure methods, including mechanical devices. --
