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    Re: Silicon Sea problem solving
    From: Dan Hogan
    Date: 2000 Apr 11, 10:14 PM

    If SWMBO will not permit the purchase of a navigation manual, I suggest
    you use what your local library may have available. You will need an
    understanding of the basics of celestial and Dead-reckoning navigation.
    "Bowditch" Pub NO. 9, The American Practical Navigator or Dutton's
    Navigating and Piloting.
    The Nautical Almanac Concise Tables are sight reduction tables normally
    used for sight reduction of all astronomical bodies listed in the almanac.
    The Hc(calculated altitude) and the Zn(azimuth) are used to plot the
    LOP(line of position) of the body on a plotting sheet.
    Download POSPLOT.EXE form the NAV-L web sute. It is a windows program that
    prints plotting sheets on a printer.
    On 11 Apr 2000, at 18:41, Patrick McVey wrote:
    > I had great results using GhostView (a freeware GNU/Windows program that
    > views & prints postscript files) to print the VS-OP plotting sheet named
    > nav.ps on your ftp host. I am having trouble understanding the sight
    > reductions. From a passage in the Yr2000 N.A., they say the Concise Sight
    > Reduction Tables are used for determining a "H-calculated" I can see your
    > point though where that would be good enough for SS legs. I will try it.
    > I'm plugging away & having fun doing it. Thx Patrick
    Dan Hogan
    NAV-L Web Page: http://nav.cnchost.com

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