Norsepower completes installation of worldâs first tiltable Rotor Sails on SEA-CARGO Roro 21 Jan 2021 Finnish auxiliary wind propulsion systems provider Norsepower Oy Ltd on Wednesday (20 January) said it has successfully installed two 35m tall Rotor Sails for SEA-CARGO, a leading logistics provider in the North Sea market. This installation heralds the worldâs first tiltable Rotor Sail, showcasing that vessels that have to negotiate height restricted routes can benefit from this fuel and emissions-saving solution. The sail is also the first third-party verified and commercially operational auxiliary wind propulsion technology for the global maritime industry. The solution is fully automated and detects whenever the wind is strong enough to deliver fuel and emission savings, at which point the Rotor Sails start automatically.