{"id":4251,"date":"2025-02-03T20:00:35","date_gmt":"2025-02-03T20:00:35","guid":{"rendered":"https:\/\/krogragg.com\/?p=4251"},"modified":"2025-02-03T20:00:35","modified_gmt":"2025-02-03T20:00:35","slug":"offshore-wind-worlds-largest-hlv-will-feature-ulstein-u-stern","status":"publish","type":"post","link":"https:\/\/krogragg.com\/?p=4251","title":{"rendered":"Offshore wind: World\u2019s largest HLV will feature Ulstein U-stern"},"content":{"rendered":"

Offshore wind: World\u2019s largest HLV will feature Ulstein U-stern
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Japan\u2019s Penta-Ocean Construction has signed a shipbuilding contract with Seatrium<\/a> covering the construction of what it says will be the world\u2019s largest heavy lift vessel. To be used for the installation of offshore wind turbine monopile foundations, it will feature a fully revolving 5,000-tonne crane and the Ulstein U-stern.<\/p>\n

With a U-shaped notch at the stern, the HLV is designed to upend a monopile being stored lengthwise on the vessel using the 5,000-tonne crane and an upending system with a gripper that enables installation directly at the notch. Since the installation is performed at the stern, the HLV\u2019s hull shields its operation from waves and currents, thereby minimizing ship motions.<\/p>\n

Ulstein Design & Solutions has been awarded the contract for the hull design, while Huisman Equipment will build the on-deck equipment, which includes the fully revolving 5,000-tonne crane and the monopile upending system with gripper. Completion is scheduled for May 2028, with operation anticipated in the fall of 2028.<\/p>\n

Huisman says Its 5,000 tonne active heave-compensated tub mounted crane<\/a> features a dual main hoist and universal quick connector, enabling efficient, safe tool changes to reduce cycle time and safety risks. Key advantages of the low weight tub mounted crane include a compact tail swing for deck space optimization, no counterweight, full revolving capacity, and an in-house produced slew bearing.<\/p>\n

The motion compensated pile gripper is specifically designed for the installation of large-diameter, variable-length monopiles over the vessel\u2019s unique U-shaped stern. With the monopiles being stored lengthwise on the vessel, the integrated upending system enables direct handling from storage to installation.<\/p>\n

Other features<\/p>\n