This is no small feat, there's no end to interference and environmental challenges getting anything to work in the ocean environment. The acoustic noise alone from all this ship traffic is nothing short of deafening to marine mammals and causing no end of problems for them, physical and psychological- and of course collisions don't help either.
Actually the sound that ships make help the whales and other mammals avoid them. The ban on hunting has had the greatest impact:
The problem with shipping is there's so much of it. I recall one expert on the topic saying it has increased 30x since 1980. This is just more fallout from having an overpopulated planet creating so much demand. Here's a brief understandable summary of the problem. It's much more than impacts. The noise problem is getting to be really damaging, the marine mammals can't get any peace, they have less offspring, and their food supply gets scattered.
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