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    Chronometers after radio time signals
    From: Frank Reed
    Date: 2007 Oct 23, 06:01 -0400

    An interesting issue came up recently on Wikipedia...
    Before radio at sea (c.1905), chronometers were checked primarily by
    redundancy. One would carry three or four chronometers (or ten or even
    twenty), and they would verify each other. In an earlier period, up until
    the 1850s, when chronometers were prohibitively expensive, at least for some
    user communities, lunars provided the check on the chronometer. But what
    happened when radio time signals were introduced? Of course, it was the
    final nail in the coffin for the long obsolescent lunars, but there must
    also have been implications for the economics of chronometers. If you can
    check the chronometer by radio once or twice a day, then, first of all, you
    no longer need multiple chronometers, and second the chronometer you carry
    no longer needs to be reliable for weeks at a time. So did any chronometer
    manufacturers go under after about 1905?? Also, was there a sudden glut of
    used chronometers on the market at about the same time? Just food for
    And, by the way, welcome aboard to any Wikipedians who are new to NavList.
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