The future of shipping may be powered by an idea that is thousands of years old: wind. Maersk has agreed to install a 35-meter rotor sail on one of its 8,700-TEU container ships. The technology, developed by Anemoi Marine Technologies, is expected to be fitted by mid-2027 and tested during the vessel’s regular commercial operations. Unlike a traditional fabric sail, a rotor sail is a tall, rotating cylinder that uses wind to generate additional forward thrust.