I’ve heard talk of the US working on putting wind farms on the northern Atlantic seaboard far enough out that people on land would not even see them. I don’t know if that is economically feasable, but if it is, it may actually be relatively practical. The Oceans are really like an enormous desert. There aren’t many birds to cut up. There isn’t all that much boat traffic out there.
Yeah practical. To place and operate windmills in a marine environment is horribly expensive, way more then the land based ones which are themselves ridiculous as a source of dependable electricity.