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    Re: Compass card with more than 360 degrees
    From: Clyde Nickerson
    Date: 2006 Apr 7, 17:58 -0300

    OK Lou, but how about the 6400 Mils circle that we used to lay guns in the
    Artillery.....
    
    Clyde
    ----- Original Message -----
    From: "Lu Abel" 
    To: 
    Sent: Friday, April 07, 2006 12:07 PM
    Subject: Re: Compass card with more than 360 degrees
    
    
    > 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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