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    Re: Question Re: Position by Calculation
    From: Gary LaPook
    Date: 2014 Jan 13, 11:01 -0800
    Weems computation using the Rust diagram

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6745


    Weems computation of azimuth using the B table.

    http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6785

    gl




    From: Gary LaPook <garylapook@pacbell.net>
    To: garylapook@pacbell.net
    Sent: Monday, January 13, 2014 10:52 AM
    Subject: [NavList] Re: Question Re: Position by Calculation


    Here is a Dreisonstok solution:

    http://www.fer3.com/arc/m2.aspx?i=106744&y=200812

    And Weems:

    http://www.fer3.com/arc/m2.aspx?i=106745&y=200812

    gl


    From: Bruce J. Pennino <bpennino.ce---.net>
    To: garylapook---.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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