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    Re: Plotting tools
    From: Bruce Hamilton
    Date: 2008 May 27, 19:52 -0700

    Plotting tools I have Known:
    
    When I worked on large ships. I used really good parallel rules and
    dividers. Cheap parallel rules are too wobbly.  A US trained mate told
    me about the 2 triangles, but I never tried them out. Dividers were
    great for loran c interpolation too.
    
    When I learned to navigate in small airplanes, I learned to use a small
    (4 inch?) circular protractor with a string through it.  I also had a
    square protractor. I knew the distance between my thumb and forefinger
    on standard maps, as well as the width of my fingers. I often had my
    maps in plastic cases and wrote on them in grease pen. I always like the
    fact that you are always calculating drift for aircraft, whereas it is a
    given in Transport Canada Marine Navigation exams, but when did exams
    ever have much to do with reality?
    
     In Canada, we still have oral exams after the written ones.  I can just
    break out in a cold sweat thinking of them.  I still have stacks of old
    Nav. Safety multiple choice exams tucked away in case I decide to renew
    my tickets.
    
    I transfered the small tools from aircraft to small boats. They work
    well if you are short on space.
    
    Bruce
    
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