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    Re: Averaging sights on commercial vessels
    From: Alexandre Eremenko
    Date: 2004 Oct 7, 17:17 -0500

    Trevor,
    Thank you very much for your explanation.
    I forgot about Sat Nav indeed.
    Do you know when approximately did they start using it?
    (I suppose, not earlier than late 70-s).
    The manuals I cited were written in the 60-s when
    no Sat Nav existed.
    I am just trying to understand when CelNav was replaced
    by various satellite-based systems as a main tool of finding
    position on commercial and navy ships.
    Alex.
    
    P.S. LORAN only works near a shore, correct?
    The only precise means available in the middle of an ocean
    are CelNav and satellite-based systems, correct?
    A
    
    
    

       
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