So graphing the ocean floors using sonar is not anything new. But what are the limits to sonar?
Would it be possible for a regular sonar device to emit sounds that are strong enough to penetrate through polluted waters? And if they can, how much pollution is needed to block the sonar completely? And by pollution I mean plastic waste (bottles, bags, etc).
Also, would highly populated waters be a problem? I'm talking about corals, fish, algae, and others. I'm pretty sure just one fish wouldn't do much, but what about a whale? Or a swarm of fish?