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    Re: mechanical chronometers
    From: Frank Reed CT
    Date: 2006 May 15, 22:19 -0500

    Alex you wrote:
    "Apparently chronometers were always expensive.
    A book I am reading now mentions that there were only 44
    chronometers in the whole French Navy in 1833.
    Whether the rest used Lunars or just relied on dead reckoning
    for longitude I don't know."

    The latter two are not mutually exclusive. Standard practice on
    American commercial vessels until the 1830s or so was to use DR for
    longitude with occasional checks by lunars, generally every two weeks
    or so. That number of chronometers sounds a bit low to me for 1833. Not
    impossible, but could it be that the writer was referring to an earlier


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