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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@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
> >
> >
> > --------------------------------------------------------------------
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> >
> >

   

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