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Subject: Re: Silicon Sea problem solving
From: Dan Hogan (dhhogan@XXX.XXX)
Date: Wed Apr 12 2000 - 00:14:26 EDT
Patrick:
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
dhhogan@XXX.XXX
NAV-L Web Page: http://nav.cnchost.com
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