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    Re: Pub.229 GC-Calculation distance and course.
    From: John Karl
    Date: 2009 Dec 1, 19:37 -0800

    Guus,
    
    I don't understand the 0.2* that you're talking about.  The Z
    interpolation is for the dec between 29* and 30*, the desired Z being
    for dec = 29* 52'.  So the Z interpolation calculation is 52'/60' X
    0.9* = 0.8*, giving Z = 66.9* - 0.8* - 66.1* as in the book.
    
    Make sense?
    
    JK
    
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