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    Re: Sumner's Line (Navigation question)
    From: Bill B
    Date: 2006 Feb 7, 17:10 -0500

    > This subject was rather thoroughly discussed on this
    > list in September 2004.  I suggest you go to the
    > archives at
    
    Thanks Chuck
    
    The posts augmented Frank's excellent explanation, an confirmed my suspicion
    that one could also determine longitude by adding or subtracting LHA to/from
    the body's GHA at the time of the sight.
    
    Bill
    
    
    

       
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