Classification society ClassNK has granted an Approval in Principle (AIP) for the Seawing system, an automated wind-powered kite capable of towing commercial ships and improving a vessel’s fuel economy by 20%.ClassNK granted the approval to the shipping company Kawasaki Kisen Kaisha, Ltd.
https://www.marinelink.com/news/k-line-airseas-aip-seawing-kite-system-481054