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    Re: How Many Chronometers?
    From: Brad Morris
    Date: 2009 May 6, 16:31 -0400

    Hi Jim
    I think the problem is that the rate changes.  How would you know the new one?
    Let us assume that you have a CE of 60 seconds, which gains 5 seconds a day.  
    Due to some unknown problem, the rate changes.  What is the new rate?  What 
    is the new CE?  And therefore, what is GMT?
    Having a record of what happened in the past is not necessarily a predictor of future performance.
    Best Regards
    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of James N Wilson
    Sent: Wednesday, May 06, 2009 3:31 PM
    To: NavList@fer3.com
    Subject: [NavList 8159] Re: How Many Chronometers?
    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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