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    Re: Hello! Is there anybody out there still working on the Silicon Sea Problem Legs?
    From: UNK
    Date: 2009 Jun 9, 16:45 -0400

    On Tuesday, June 09, 2009 1:19 PM, Bill Lubitz said:
    > A couple questions, yes I have many!
    > (1) Often wind force is listed. It is stated as: "Wind is force 4
    > from 175 degrees." 
     
    "Wind force" refers to the Beaufort Scale, a methodology for describing
    wind velocity prior to the development of velocity-measuring
    instruments,
    and still in (declining) use. See
    
    http://www.spc.noaa.gov/faq/tornado/beaufort.html
    
    or the Wikipedia article for some background.
    
    > (2) Often current set and drift are given. Is it your intent that
    > this be included with course and boat speed as a known condition
    > in the computation of a DR position. In the notes, it stipulates
    > that only estimated position (EP) should include DR+current effects.
    > I have seen it done both ways.
    
    This lead to some lively discussions at the time. But the author (hey,
    Dan, you still out there?) is entitled to his preference.
    
     -- Peter Smith
    
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