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    Re: Bowditch Table 15
    From: Jim Thompson
    Date: 2005 Jan 27, 18:35 -0400

    Eureka!  A collegue on the CPS-ECP Discussion Forums scanned the relevant
    pages for me from a 1970's Bowditch.  It is a gold mine of revelation.  All
    that useful preamble has been removed from the current 2002 Bowditch,
    leaving such limited and garbled information that I could not begin to
    untangle the point of Table 15 on my own.
    1. Figure 1203a in the 1970's Bowditch shows that D is the distance over the
    curve of the earth from the ship's waterline to the object's sea level,
    perpendicular from the top of the object.  Done.
    2. That edition also gives specific step-by-step examples for how to use the
    3. The forumla used to generate Table 15 (9) was derived in this article:
    Guier, William. Note on Determining Range from Sextant Altitude.  Journal of
    Institute of Navigation, Washington, D.C., USA.  Vol. 4, Winter
    Table 9 was a modification of tables provided in that article.
    Can anyone obtain Guier's article for me?  I would love to read it.
    I shall revise my webpage accordingly.  Thank you all, for your patience and
    Jim Thompson
    Outgoing email scanned by Norton Antivirus

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