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    Re: How Many Chronometers?
    From: Greg Rudzinski
    Date: 2009 May 6, 13:38 -0700

         Naturally a log of rates should be kept for each chronometer.
    Once chronometer rates are known then three chronometers which were
    synchronized for the purpose of comparison should provide answers to
    two unknowns. 1. that each chronometer is functioning consistently
    with respect to each other and 2. that the original date of
    synchronization could be determined without prior knowledge. The
    navigator should then be able to arrive at the correct GMT/UT knowing
    only that the chronometers were synchronized on the same day.
    On May 6, 12:31�pm, James N Wilson  wrote:
    > How about a log which keeps error and rate. John Harrison's chronometer
    > had to be accurate for three years at sea for him to win the prize. And
    > there were zero sources of time ticks then.
    > Jim Wilson
    > ____________________________________________________________
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