There are several reasons. The old technology, the barrage technology, was too expensive and too environmentally destructive. The new technology is so new that people are still trying to figure out how it can work best. If you look at these test sites, they've had many difficulties with them. They've learned a lot of, course, but they've still had a lot of difficulties. It's a very tough environment to work in, under sea.
I was just talking with Sean about the difficulty of offshore wind and he said that's very tough. Take that a step further and put it under water. I'll just use one example to drive that point home. The last turbine that was installed in Canada was in the Bay of Fundy. They were monitoring it with remote devices. Suddenly those devices stopped, and now they don't know what the heck is going on down there. It's so dark down there they can't send divers down. It's a whole new area.