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    Re: Bygrave revised rules for converting azimuth angle to Zn
    From: Gary LaPook
    Date: 2010 Jul 12, 03:49 -0700

    Here is link to my website where you download the PDF files for the 
    scales so you can make you own copy.
    
    https://sites.google.com/site/fredienoonan/other-flight-navigation-information/modern-bygrave-slide-rule
    
    gl
    
    Gary LaPook wrote:
    > Gary LaPook wrote:
    >
    > This is how the new rules should look.
    >>
    >> The new rules look like this:
    >> 
    >>                                                                 
    >> Azimuth Rules
    >>                                                                 North 
    >> Latitude
    >>                                                      0 < LHA  < 180  
    >> < LHA < 360
    >> If DEC or W > LAT                  Zn = 360 - Az        Zn = Az
    >> If DEC contrary or W < LAT    Zn = 180 + Az        Zn = 180 - Az
    >>
    >>                                                                 South 
    >> Latitude
    >> If DEC or W > LAT                  Zn = 180 + Az        Zn = 180 - Az
    >> If DEC contrary or W < LAT     Zn = 360 - Az        Zn = Az
    >>
    >>
    >> I have attached a better copy of the revised form.
    >>
    >>
    >>
    >> gl
    >
    
    
    
    
    

       
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