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There is a 7 meter scale model to verify the design.

A lot less than "being the world's largest wind powered vessel right now", but also a lot more than "just CGI"

Oceanbird probably is not a CGI only product. If you check the startup behind it started from KTH university then you and follow the related people in there you can see it is just not built but it is a product of so much simulations. I am not sure if it works out but the idea is more robust than one might assume initially.

CNN has a reputation alright, but it's not for depth or accuracy.

Which one has a reputation for depth & accuracy?

The Economist?

Fox

None. That's the sad reality of journalism in America.

That was your takeaway from the article? Nitpicking the grammar?

That's not nitpicking the grammar. It changes the meaning of the sentence. And if that's the only sentence you read you'd have no way of knowing it's wrong.