Seatrium has reached a construction milestone with the official steel cutting for Penta-Ocean Construction Company Limited’s (POC) Heavy Lift Vessel (HLV). The strike steel ceremony took place on September 29, 2025, at Seatrium’s Nantong yard in China, 246 days after the contract signing.
The vessel is designed with a 5,000-ton main crane and will be one of the largest self-propelled heavy lift vessels currently under construction. Steel fabrication is also in progress at Seatrium’s Subic yard in the Philippines.
This HLV is part of a larger initiative announced on January 27, 2025, when POC and Fuyo General Lease Co., Ltd. (Fuyo Lease) revealed plans to jointly own two advanced offshore construction vessels: the heavy lift vessel and a cable laying vessel (CLV). The HLV, which Seatrium is building, will feature a fully revolving 5,000-ton lifting crane. Its design is intended to handle increasingly heavier monopile foundations required for installing next-generation offshore wind turbines in the 15 to 20MW class.
The total estimated construction cost of the HLV is around JPY 120 billion. Once completed, it will be jointly owned by a POC subsidiary (50%) and Fuyo Lease (50%). This vessel is positioned to play a critical role in Japan’s offshore wind development, particularly as the market shifts to full-scale construction in general sea areas beyond port zones.
