> I'm actually a bit disappointed they used magnets since it'd be so easy to mess up the orientation with a bit of otherwise benign interference. That happens

> I'm actually a bit disappointed they used magnets since it'd be so easy to mess up the orientation with a bit of otherwise benign interference. That happens to a fair description of magnetic compasses as well. I suppose that’s why some compasses use a modern version of the south-pointing chariot (gyroscopes).