Largest ship with rotor sails

The Chinese, together with the British, have launched the world's largest rotor sail ship. Thanks to fuel savings, they will allow for a reduction of CO₂ emissions by 3,000 tons per year. The ship will be used to transport iron ore. During loading and unloading, the 35-meter-high sails fold onto the deck without causing any obstruction, and on the water, they rotate under the influence of the wind, generating additional thrust.