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Lu,

> The problem with "GPS as compass" is that GPSs can only determine position.
> Everything else that a GPS might show (especially direction of
> movement) is derived from a succession of positions.

This was exactly what I thought when I was shown this "GPS compass".
One was supposed to turn the GPS device (like a compass) in certain
direction and it told you the asimuth of this direction...
with the error of sevral 10's of degrees:-)

(I did not even need a compass to see this, an analog watch and the Sun
was enough).

I imagine some people who believe in technology, carry only GPS
with them, and use this info without even looking at the Sun:-)

Alex.

   

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