Korean Register (KR) has signed a Memorandum of Understanding (MoU) with HD Hyundai Heavy Industries (HD HHI), UK-based wind propulsion technology company BAR Technologies, and the Liberian International Ship & Corporate Registry (LISCR) to jointly develop a 174K LNG carrier equipped with the WindWings® wind-assisted propulsion system.

The agreement was signed on 15 September at Gastech 2026 in Bangkok and aims to assess the technical feasibility and safety of applying wind-assisted propulsion technology to LNG carriers as the global shipping industry accelerates its transition toward decarbonization.

The project will focus on a 174K LNG carrier developed by HD HHI featuring a forward accommodation arrangement. By positioning the crew accommodation block toward the bow, the design provides additional space on the upper deck, creating an opportunity to integrate BAR Technologies’ WindWings system.

WindWings® uses large, rigid wing sails installed on a vessel to harness wind as supplementary propulsion. By reducing reliance on the vessel’s main propulsion system, the technology can lower fuel consumption and greenhouse gas emissions while improving overall energy efficiency.

Under the collaboration, HD HHI will lead the vessel’s basic design and design review, while BAR Technologies will provide technical data covering the arrangement and specifications of WindWings, structural strength, operational concepts and expected fuel savings.

KR, together with LISCR, will assess the safety and technical suitability of the design against applicable rules and international requirements. Based on the outcome of the assessment, KR will also consider granting Approval in Principle (AIP), supporting the application and future commercialization of wind-assisted propulsion technology on LNG carriers.

Hongryeul Ryu, Chief Technology Officer of HD HHI, said: “We have continued to develop innovative hull forms and arrangement concepts for LNG carriers to advance environmentally friendly ship technologies. Through this project, we aim to integrate wind-assisted propulsion technology into our forward accommodation LNG carrier design, further enhancing the competitiveness of next-generation, low-emission LNG carriers.”

John Cooper, CEO of BAR Technologies, said: “We already have WindWings® deployed across 10 bulkers and tankers, with 23 WindWings collectively saving approximately 100 tonnes of CO2 per day. We look forward to extending the application of WindWings to next-generation gas carriers, establishing a robust foundation for safe commercialisation, and providing shipowners with a genuinely attractive environmental solution.”

Kyujin Yeon, Executive Vice President of KR, said: “Through this joint development project, KR will assess the safety and technical suitability of applying wind-assisted propulsion to this LNG carrier design against applicable rules and international requirements, with a view to granting Approval in Principle. By working closely with the shipyard, technology provider and flag administration, KR will continue to support the safe and reliable adoption of innovative technologies that contribute to the maritime industry’s decarbonization.”

Alfonso Castillero, CEO of the Liberian International Ship & Corporate Registry, added: “This JDP reflects the Liberian Registry’s proactive approach to supporting the safe and responsible advancement of innovative maritime solutions. By assessing wind-assisted propulsion for LNG carriers from an early design stage, the partners can help translate the decarbonization challenge into practical opportunities for improved efficiency, future-ready ship designs and competitive advantage, without compromising safety or quality.”

Hyundai HHI:

Mr. Hong-Ryeol Ryu - Senior Executive Vice President (CTO)

Mr. Chang-Kyung Sung - Senior Vice President

Mr. Hyo-Geon Kim - Senior Engineer

BAR Technologies:

Mr. Lukasz Brzoska - Head of Ocean-going Vessels

Liberian Registry:

Mr. Thomas Klenum - Executive Vice President

Mr. George Novak - Vice President, Commercial

Mr. Jung Sik Kim - Managing Director of Korea office

Ms. Su Jeong (Krystal) Choe - Assistant Technical Manager

 Korean Register :

Mr. Lee Yongsok – Chairman & CEO

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About BAR Technologies

With an impressive heritage, having spun out of Great Britain's former America’s Cup Team, BAR Technologies provides a wide range of design and engineering consultancy services across commercial ships, workboats, leisure boats, and engineered solutions. The company boasts a team of world-leading naval architects, optimisation specialists, fluid dynamists, and system engineers, all focused on delivering next-generation maritime technology.

About WindWings®

BAR Technologies’ patented three-element wing design is unique in the marketplace, delivering 2.5 times the lift of a single-element wing. Unlike other wind-assisted propulsion systems, WindWings® require no continuous power for suction fans or mechanical spinning. They automatically adjust camber and angle of attack for optimised efficiency across a wide range of wind conditions, offering a proven, scalable solution for emissions reduction.

WindWings® deliver an average of 1.5 tonnes of fuel savings per wing per day across global routes, positioning them at the forefront of commercially ready, zero-emission maritime solutions supporting decarbonisation at scale.

About HD Hyundai Heavy Industries

HD Hyundai Heavy Industries is a global shipbuilding and engineering company, providing a wide range of maritime solutions across commercial and offshore sectors. The company continues to contribute to the development of efficient and sustainable ship technologies through its design and engineering capabilities.

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