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    Re: Electronic vs non-electronic
    From: Rodney Myrvaagnes
    Date: 1999 Oct 03, 22:14 EDT

    I don't think you answered his question. If the island, reef, etc. is charted 
    wrong, celestial will not find it correctly, except by
    accident.. Datum discrepancies the same. Ellipsoid, same.
    GPS system errors are not significant in this context. 100 meters is closer 
    than you are likely to get with celestial anyway.
    If you are close enough to anything  that gps discrepancies would matter, on a 
    chart that is not corected to a stated and known
    datum, you are piloting on your own. Celestial is irrelevant in such a situation.
    On Sun, 3 Oct 1999 19:24:48 -0400, Craig wrote:
    >There are several problems associated with making GPS positions jibe with charted positions, including:
    >-??GPS system errors
    >-??datum errors
    >-??charted position errors
    >- elipsoid (theoretical sphere on which GPS is based) vs. geoid (actual 
    surface of the earth) differences
    Rodney Myrvaagnes                   J36 Gjo/a
    Associate Editor           Electronic Products
    20+ years without a Car, a TV, or a website

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