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    Re: sextant without paper charts
    From: Scott Owen
    Date: 2008 Nov 03, 16:41 -0600

    frankreed@HistoricalAtlas.net wrote:
    > And while not 100% a navigational error, there's the incredible near-loss of
    > the USS San Francisco in 2005 after it plowed into a mountain at 33 knots:
    > http://en.wikipedia.org/wiki/USS_San_Francisco_(SSN-711)
    > (be sure to click on that small picture to see the details of the damage to
    > her bow section).
    >  -FER
    Running into a sea mount at 33 knots can ruin your whole day.  IMHO for
    this to happen there had to be serious issues with the error rate of the
    boats Inertial Navigation System or gross error in the plotted position.
    It would be interesting to know the last time the submarine had been to
    the surface prior to the accident as it would have been very easy to get
    a GPS fix, and then just about as easy to "cross check for INS error".
    Whether they were using paper or digital bathymetry charts for plotting
    was probably not a factor.
    Navigation List archive: www.fer3.com/arc
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