The Return of Sail Power: Cargo Ships Are Turning Back to the Wind
4 hours ago
- Commercial shipping is increasingly installing wind-assisted propulsion systems like rotor sails, wings, and suction-based sails to reduce fuel consumption alongside conventional engines.
- The technology is moving beyond niche experiments, with over 100 large merchant ships equipped and growing interest from major owners like Maersk, but it still represents a tiny share of the global fleet.
- Wind propulsion is being integrated with engines, batteries, and voyage planning through programs like WINTEGRATE, and it offers retrofitting potential with fuel savings typically in single to low double digits.
- Despite limitations like unpredictability, deck space, and regulatory catch-up, real operating experience is accumulating, supporting a shift toward wind as part of the propulsion mix, not a full return to sails.