True in shallow waters, a literal drop in the ocean if you pump the salty water a bit further out where it is deeper. The Pacific coast in the US is pretty deep

True in shallow waters, a literal drop in the ocean if you pump the salty water a bit further out where it is deeper. The Pacific coast in the US is pretty deep even close to the coast. The Atlantic is pretty deep as well. Of course pumps and pipes cost a bit extra so there is a tendency to cut corners there. But it's not a challenging problem technically.