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    Silicon Sea charts
    From: W Murfin
    Date: 1997 Mar 10, 19:55 EST

            Charts for upcoming legs of Silicon Sea have been posted at the
    Ronin ftp site.  They can be downloaded  by ftp or with a web browser using
    the URL ftp://ftp.ronin.com/incoming.  This is easy to do with Netscape.  It
    automatically displays the graphic file and you may be able to print it
    directly from Netscape.  If you use an ftp program or some other web browser
    you may need a program to view and print gif coded files.  A freeware viewer
    program for Windows is also available at ftp.ronin.com/incoming under
    lview.zip.  The Silicon Sea chart files are:
            egypt.gif     - approach to Egypt
            portsaid.gif  - Masabb Dumyat to Port Said
            suez.gif      - Suez canal
            gulfsuez.gif  - Gulf of Suez with charted lighthouses
            redsea1.gif   - Red Sea, lat 28N to 25N
            redsea2.gif   - Red Sea, lat 25N to 22N
            redsea3.gif   - Red Sea, lat 22N to 19N,
                              Port Sudan and Jeddah
            redsea4.gif   - Red Sea, lat 19N to 16N
            redsea5.gif   - Red Sea, lat 16N to 13N
            redsea6.gif   - Bab el-Mandeb Strait
            aden.gif      - approach to Aden harbor
            These are minimal charts with not much more than a coast outline and
    a lat-long grid.  They are all derived from the Map Viewer program at Xerox
    PARC, http://pubweb.parc.xerox.map, with place names from assorted atlases
    and encyclopedias.  I don't have any access to the detailed information
    usually found in navigation charts and these might better be called
    "chartlettes".  They are still usefull for providing some geographic
    orientation for the Silicon Sea cruise and if printed can be used as
    plotting sheets.
            For plotting you will need a course plotter or some device for
    measuring angles.  Each chart has part of the latitude scale graduated for
    measuring distance.  You need to construct a scale for measuring longitude
    but this is easy to do using the method outlined in Bowditch in the
    emergency navigation section.  You can probably get an accuracy of about 2
    nautical miles.
            There is also a Windows program to generate and print position
    plotting sheets, posplot.zip at ftp://ftp.ronin.com/incoming.  These sheets
    include a compass rose and are specific for each latitude.  Even with the
    occasional jagged line of computer graphics they should allow an accuracy
    equivalent to universal plotting sheets.
            Let me know if you have trouble retrieving any of this.
    
    Wes Murfin               email: wmurfin{at}XXX.XXX
    1409 Cando Pl            phone: 910-455-8746
    Jacksonville, NC 28540
    

       
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