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    Re: The End of Celestial Navigation??
    From: Lu Abel
    Date: 2008 Jan 02, 12:28 -0800

    Fred Hebard wrote:
    > On Jan 2, 2008, at 2:07 PM, Lu Abel wrote:
    >
    >
    >>
    >> Greg R. wrote:
    >>
    >>> --- frankreed{at}HistoricalAtlas.net wrote:
    >>>
    >>>
    >>>
    >>>> What do you think he's talking about?
    >>>>
    >>>>
    >>> Obviously someone who hasn't had a major electrical/electronics
    >>> failure
    >>> while out on the open ocean...  ;-)
    >>>
    >>>
    >> Would that include my quartz crystal controlled watch?
    >>
    >> I truly believe in the adage that a good navigator has two or more
    >> sources of positional information available.   And only a fool
    >> would go
    >> offshore with a single GPS set, even if it were integrated into the
    >> fanciest electronic charting system.
    >>
    >> But I can't figure out why the "can't trust electronics, gotta use
    >> celestial" crowd seems perfectly happy with electronic chronometers
    >> (synchronized, of course, by listening to WWV or BBC), and perhaps
    >> even
    >> reducing their sights using a calculator.   Those electronics are
    >> subject to exactly the same failure modes as GPS sets.
    >>
    >
    > The answer leads us back to the subject: lunars.  Of course you have
    > to trust the Nautical Almanac, but....
    >
    > Fred Hebard
    >
    Which is generated using *electronic* computers.    Darn, where are
    those 19th century logarithm tables when we need them!!  :-P
    
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