# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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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
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
>
>
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
>
>

```
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