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    Re: Poor St. Hilaire
    From: Geoffrey Butt
    Date: 2007 Oct 30, 12:03 -0000

    John, you wrote:
    
    "... many students ask:  If we know everything necessary to
    plot the LOP, why do we need assume anything??"
    
    Because they want to use Sight Reduction Tabels as a quick, mentally
    undemanding method to plot LOPs.
    
    I teach a lot of commercial sailors who require AN for Deck Officer tickets.
    They want a method which works, and which requires a minimum of
    sophistication.
    
    Similarly, when I am cruising, I carry a selected few sheets from SR Tables
    to cover the latitudes I need and a few pages of Almanac data.  That's all.
    
    When at home with computer and library resources I agree with you:  there is
    no need to assume anything to plot an LOP.  But that's not real life on a
    small boat or a minimally manned commercial vessel.
    
    Geoff
    
    
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