This is a very interesting concept. I would love to see how these ships actually perform. It didn’t mention in the article if they had one built yet, so I have to assume they haven’t got that far.
If this really works the way they explain in the article -like a very large sailboat using the hull itself as a sail- then I think it would really do what they claim (save 60% on fuel and 80% on emissions).
I hope they hurry up and get a few built so they can test their theories. 🙂