That's actually entirely brilliant! Yes, it would be extraordinary! I think that would be another advantage of a whale too, being able to map out ocean terrain for hundreds of miles in all directions... just before you'd said that, I had been thinking about the kind of experience that dogs (and other animals who's sensory input is not primarily visual) must have of the world.. very different, surely. It's amazing to me that we're able to get on as well as we do, considering what different perceptual universes we live in...