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    Re: Electronic vs non-electronic
    From: William Trayfors
    Date: 1999 Oct 03, 23:08 EDT

    I don't think anyone's slamming GPS in favor of celestial.  Rather, some of us
    are just trying to urge the prudent navigator to use GPS cautiously (just as
    you would celestial), rather than take as gospel the digital output of the
    little black box.  You'd be surprised how many folks seem willingly to risk
    their boats and their lives on GPS output alone.
    At 10:58 PM 10/3/99 -0400, you wrote:
    >Then I gather the problem is TOO much reliance on GPS because of it's
    >perceived "high tech" status.  Celestial would presumably not help an
    >incorrect chart and therefore GPS is being slammed in favor of celestial
    >because GPS is "new-fangled".  Am I correct in this assumption?  I realize
    >GPS can fail, as can celestial (clouds, delirium, alcohol...).  Perhaps GPS
    >is more reliable for most navigators.
    >-----Original Message-----
    >From:   Navigation Mailing List [mailto:NAVIGATION-L@XXX.XXX]
    >On Behalf Of Richard B. Emerson
    >Sent:   Sunday, October 03, 1999 20:52
    >Subject:        Re: Electronic vs non-electronic
    >Craig writes:
    > > OK, So which one is the problem?  The GPS or the charts?  If you are
    > > actually at a location and the GPS does not match the chart, would
    > > match the chart or is the chart wrong?
    > >
    >The chart is wrong.  This problem happens, for example, in the South
    >Pacific where some survey data is pretty old.  BTW, speaking of old
    >survey data, even highly travelled areas like the Chesapeake use
    >hydrography from the early to mid-40's!
    >S/V One With The Wind, Baba 35
    Bill Trayfors <btrayfors@XXX.XXX>
    The Washington Decision Support Group, Inc.
    Specialists in Advanced Information & Communications Technologies
    2401 South Lynn Street, Arlington, VA 22202
    Office (703) 838-8784   Tech Support (703) 573-WDSG   FAX (703) 838-0019

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