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    Re: Navigation without Leap Seconds
    From: Lu Abel
    Date: 2008 Apr 17, 23:48 -0700

    frankreed@HistoricalAtlas.net wrote:
    > I'm sure
    > someone will invent a solution, especially if anyone can think of a
    > practical application of these super-clocks. It may be the case, though,
    > that the business of ever more accurate time measurement has hit a brick
    > wall with no means of comparing clocks at different locations which may last
    > for a few decades conceivably.
    That seems like the problem -- clocks are so accurate that the act of
    moving them will literally cause them to lose time -- Einstein's Theory
    of Relativity says the time passes more slowly for something in motion
    than something that's at rest.   So how to take two clocks at different
    locations and compare them??  Have them send signals (ala listening to
    WWV or some other time station to set one's watch)?   That takes time.
    Synchronize a portable clock to one of the ultra-precise clocks and take
    it to the other?  The very act of moving the portable clock will throw
    it off.    A mind-boggling challenge.    Maybe we've just gotten too
    Lu Abel
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