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    Re: from a watcher
    From: Dan Allen
    Date: 2002 Oct 17, 18:52 -0700

    On Thursday, October 17, 2002, at 06:10 PM, David Weilacher wrote:
    
    > Take lined tablet paper.  Throw out the proformas.
    > Stick with just the sun for awhile.
    
    I agree with these two observations.
    
    BTW, I do not frown on using a universal plotting sheet, nor do I
    consider myself learned.  Other than one Coast Guard costal navigation
    class I took years ago, I am self taught with regard to navigation.
    Of course I was a math & physics major in college, so I tend to enjoy
    the math & physics of it all.  Using a calculator helps me concentrate
    on the actual physics and formulas behind navigation, but if you take
    joy in using tables, by all means do it.
    
    > Only take two books with you, The nautical almanac and the one volume
    > of the
    > sight reduction tables you require.
    
    Note that the US nautical almanacs have a set of sight reduction tables
    in them already so you actually only need one the volume if you do not
    have a strong preference for a different set of tables.  Here again the
    whole point of sight reduction is solving one formula:
    
       cos(c) = cos(a)*cos(b) + sin(a)*cos(b)cos(ab)
    
    I did it by memory! ;-)
    
    Dan
    
    
    

       
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