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    Re: Watches as chronometers
    From: Bill B
    Date: 2013 Jun 15, 15:46 -0400

    On 6/15/2013 3:06 PM, Brad Morris wrote:
    > Roger that Gary!  The almanac is published at 1 second intervals, your
    > chronometer need not be better than that.
    
    Yes and no. The NA Explanation Section, PRINCIPLE AND ARRANGEMENT 2.
    Principle. states that using UTC can result in and error up to 0!2 in
    longitude, and provides a corrections table based on the difference
    between UTC and UT1. The NA giveth and the NA taketh away under ACCURACY
    24. Main Data :-)
    
    With a competent assistant and a rated timepiece, I will factor in DUT1
    for values over 0.2 s for land based observations from a known location.
    For a pleasure craft underway that seems a bit OCD to me. I have not
    gone to the extremes Bauer has.
    
     > Are your watches in a temperature controlled environment?
    
    I had posted the threads names from the inception of the project. Much
    discussion on temperature. The answer to your question is in the posts.
    I say this not to be rebuke you. Rather, the discussions on temperature
    are wonderful, and showcase the intellect and imagination of some of the
    members, as well as an interesting reference to sledge chronometers.
    There is a detailed design for a timepiece oven (easier to keep the
    timepieces above the highest expected temperature than heat and cool
    them). My favorite suggestion for keeping a constant temperature was
    stringing three digital watches together on one band, and fastening the
    band around the user's belly to create a chronometer "oven." It is a
    good read.
    
    Bill B
    
    

       
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