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    Re: Compass card with more than 360 degrees
    From: Lu Abel
    Date: 2006 Apr 7, 08:07 -0700

    I've lost track a bit of the 400 whatevers around the compass, but you
    are talking about grads (you'll even find the measurement on some
    calculators).   400 grads in a circle.
    
    We think of the metric system being firmly established in the world, but
    only a part of it -- measurement of distance and temperature -- is
    universal.
    
    Grads were part of the original metric system, an attempt to make arc
    measurements more convenient than the 360 degrees inherited from the
    ancient world (Babylonians?).
    
    Interestingly, so was a new time measurement -- the French divided the
    day into 10 hours, each hour into 100 minutes, each minute into 100
    seconds.   That makes a metric second just a tiny bit smaller than our
    usual second.  Just imagine what metric time would mean for navigators
    -- no borrow/carry mistakes calculating time intervals!
    
    Lu Abel
    
    cfi{at}licfi.com wrote:
    > Original Message: Sure I remember it , but can you still box it? Clyde
    >
    > If you mean: 400/000 = N , 050 = NE , 100 = E , 150 = SE , 200 = S ,
    >               250 = SW , 300 = W 350 = NW ?
    > That I can do; can I convert back & forth between 400 & 360 ? Not without
    > a doing some mult/div (on paper - not in my head) and that was the problem
    > at the time too; if you were told to "Fly 350 deg LOCARS" and you had a
    > regular compass you had to stop & convert.
    >                                            -Greg
    >
    >
    > --------------------------------------------------------------------
    > mail2web - Check your email from the web at
    > http://mail2web.com/ .
    >
    >
    
    
    

       
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