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    Re: No sextant, no watch, no almanach, nothing
    From: Alexandre Eremenko
    Date: 2004 Nov 9, 09:36 -0500

    Dear Bill,
    
    On Tue, 9 Nov 2004, Bill wrote:
    
    > With a nocturnal, one can use the relationships between
    > the pole star and
    > the Big Dipper, or Little Dipper,
    > or Cassiopeia to determine time, and
    > therefore, longitude.
    
    With a nocturnal, or without, you can determine only
    LOCAL time from this relationship. This is not enough for
    longitude. For the longitude you also need GMT (or time at
    some other known location).
    
    For the longitude you need either a chronometer (or telegraph
    or radio) or
    something that "happens" in the sky (besides its daily rotation).
    
    Alex.
    
    P.S. You are welcome to borrow the book I promised.
    
    
    

       
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