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    Re: Noon sight for longitude
    From: Jeremy C
    Date: 2008 Jul 11, 10:19 EDT
    Lastly, as I continue to wrestle with a method whose current primary purpose
    is to provide a platform for intellectual gymnastics, I would appreciate any
    real-world input from the list members as to the range and standard
    deviation of scatter (under poor to great conditions) they experience.  An
    allied query, at what point when you are looking at your data do you cross
    the line between fix and EP?

    Bill B.
    --------------------------------------------
    In reply to this, as an ocean going navigator, I say that my "Cutoff" is a rather arbitrary 5 nm.  If my LOP from whatever sight is 5 nm or over from where I believe I am, I disregard it or call it an EP.  Fortunately, due the availability of GPS, I have not been unsure of my position since 1997; but that is my cutoff, and it is purely a personal number for me.  Celnav at this point for me at sea is a "double check" of my electronics (I also shoot visual bearing and take radar ranges regularly near land) and a hobby.
     
    I intend to play more with both Lunars and Lat/Long near noon on my next voyage which will start in October.  I also plan on doing extensive testing on these methods during my long voyage scheduled in the summer of 2009.  I plan on taking many sights and will keep a good record to see what kind of "scatter" I get at sea.  I will try and make such records available after my trip.
     
    Jeremy





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