Since the first two gate rudder installations (pictured) were completed, a third gate rudder ship was delivered in June 2020. A fourth, a coastal container vessel, Nagara, will be delivered at the beginning of 2022.

The gate rudder propulsion device is continuing to build momentum, as recent operational results suggest that the solution offers seakeeping and safety advantages as well as significant fuel efficiencies, Professor Noriyuki Sasaki of Strathclyde University tells The Motorship.

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