NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Question Re: Position by Calculation
From: Bruce J. Pennino
Date: 2014 Jan 13, 13:03 -0500
From: Bruce J. Pennino
Date: 2014 Jan 13, 13:03 -0500
Bruce
Hello:
After seeing Greg's quick solution for Hc with
Weems (1927) and Dreisonstok H.O. 208 I did a little checking into alternative
methods for my use. Mixter's Primer of Navigation provides a brief review of
"new" methods starting with Line of Position Book, Weems (1927). Weems is pretty
easy to use but obtaining Z by "rules" is not so easy to follow. But if
you just make a sketch the quadrant is available and the extracted value allows
getting Zn.
Instead of H.O. 249, I'm looking for an alternative
short non-calculator method. Is Dreisonstok 1928 H.O. 208 an improvement over
Weems, or is Ageton (1942) A.A.A. method in Manual of Celestial Navigation a far
superior option??
It seems that Ageton's Manual is readily
available for relatively low cost ($ 7.95 U.S. Amazon). I'm probably
going to try a bunch more problems with Weems, no matter what , since I
"invested" $ 7.00 for Line of Position Book.....big spender......
Thanks in advance to all.
Bruce
----- Original Message -----From: Greg RudzinskiSent: Wednesday, January 08, 2014 6:18 PMSubject: [NavList] Re: Question Re: Position by Calculation
Attached is the VEGA Hc sight reduction done for both Weems and Dreisonstok on one side of an index card. No form needed.
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Attached File:
(Vega-Weems-208.jpg: Open and save): http://fer3.com/arc/m2.aspx?i=126237
