Mitsui OSK Lines (MOL) informed through a press release that it received approval in principle (AiP) for two new LNG carrier designs equipped with wind-assisted propulsion systems.
The certification was granted by Lloyd’s Register and validated by the flag authorities of the Marshall Islands and Liberia.
About MOL’s new vessels
The new vessel models, developed jointly with Korean shipyards HD Hyundai Heavy Industries (HHI) and Samsung Heavy Industries (SHI), are designed to transport up to 174,000 m³ of liquefied natural gas. Each unit incorporates four Wind Challenger systems, a type of rigid sail made of fiber-reinforced plastic, capable of stretching up to 49 meters in height.
These sails automatically unfurl, retract and rotate according to wind conditions.
To maximize aerodynamic performance and reduce fuel consumption, the bridge was relocated to the bow, allowing for a better arrangement of the sails. According to preliminary calculations, the new design would allow savings of up to 30% in fuel consumption per voyage, with an estimated annual average between 15% and 20%.
The operational safety of the system was rigorously evaluated in conjunction with the shipyard and relevant authorities, considering factors such as visibility from the bridge, emergency protocols and the overall stability of the vessel. This comprehensive approach allowed MOL to advance the technical details required to move from the design phase to construction.
The two new designs will be exhibited by MOL at the Gastech 2025 exhibition in Milan. The event will include technical presentations and commemorative ceremonies together with Lloyd’s Register, the shipyards and the flag states.
The Japanese company, one of the world’s largest shipping lines, plans to incorporate Wind Challenger sails on 25 vessels by 2030 and 80 by 2035. To date, two vessels have already been delivered with this system and nine others have been confirmed for installation.
Source and photo: MOL
