Warp schrieb:
> 
>   A more complicated invention of antiquity is the so-called south-pointing
> chariot. A Chinese invention which is, basically, a chariot with a figure
> on top which always points in the same geographical direction regardless of
> how the chariot is moved and turned. In other words, the figure acts as a
> non-magnetic compass, obviously very useful for travelling long distances.
> The invention might be as old as from 2600 BC (although with certainty it's
> at least from 200 AD).
> 
>   Now that one requires a bit more engineer ingenuity to build.

Not only that: It also requires high precision in the manufacturing at 
least for parts of the device. Quite a remarkable feat even for 3rd 
century I'd say.

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