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    Re: Question Re: Position by Calculation
    From: Gary LaPook
    Date: 2014 Jan 13, 10:38 -0800
    If you don't like the azimuth computation in Weems then just skip those steps and use the Rust diagram.  Dreisonstok is really simple to use but Ageton, H) 211, is more difficult.

    I compared these different methods, see:

    http://fer3.com/arc/m2.aspx/Comparison-tabular-sight-reduction-methods-LaPook-jun-2011-g16648

    gl



    From: Bruce J. Pennino <bpennino.ce@charter.net>
    To: garylapook@pacbell.net
    Sent: Monday, January 13, 2014 10:07 AM
    Subject: [NavList] Re: Question Re: Position by Calculation


    
    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 -----
    Sent: Wednesday, January 08, 2014 6:18 PM
    Subject: [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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    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126237
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126334


       
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