The problem is that in iconography, the navigator's instrument and the cornucopia blended together because they could both be attributes of Tyche or Fortuna figures, protective deities of travellers.
So no, a real cornucopia has nothing to do with the thing. But on coins etc, it has been given the shape of a cornucopia with a spike on top instead of fruit. Can't post images now, posting from phone.
VV: I like the miniature. We're talking about the animal on the left, right? One thing this interpretation has going for it is that there's definitely pointing at the sky involved.
So no, a real cornucopia has nothing to do with the thing. But on coins etc, it has been given the shape of a cornucopia with a spike on top instead of fruit. Can't post images now, posting from phone.
VV: I like the miniature. We're talking about the animal on the left, right? One thing this interpretation has going for it is that there's definitely pointing at the sky involved.