China Сommissions Mega Semi-Submersible Crane Vessel, Boosts Offshore Engineering Capabilities
16.07.2026
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The vessel Sihang Yongsheng is a non-self-propelled semi-submersible barge integrating heavy lifting and offshore transportation functions. Built by Jiangmen Hengtong Shipbuilding Co, a subsidiary of CCCC Fourth Harbor Engineering Co, it measures 110 meters in length, 43.8 meters in width and features a 4,800-square-meter deck area.
The vessel is equipped with a massive fully revolving luffing crane at its stern, featuring a 149-meter boom and a maximum lifting height of 172.5 meters, equivalent to precisely handling cargo more than 50 stories above the ground. When fixed for lifting operations, it can hoist up to 2,200 tons at a time, roughly the weight of 1,500 passenger cars, which makes it China's largest fully revolving semi-submersible crane vessel by lifting capacity, CMG reported.
According to CMG's report, Huang Chenguang, chief engineer of the project at CCCC Fourth Harbor Engineering's Hengtong Shipbuilding, said that the vessel's fully revolving operation mode allows its crane to rotate 360 degrees while anchored offshore, enabling efficient lifting of ultra-large structures such as offshore wind turbine foundations, steel structures and heavy bridge sections.
With its 4,800-square-meter continuous deck, the vessel can also transport large components with a capacity of up to 10,000 tons. When needed, it can submerge into a semi-submersible barge, allowing it to switch between heavy lifting and cargo transport functions. The vessel is designed to address challenges in offshore construction, including complex operations, low lifting efficiency and limited working conditions.
The vessel is also equipped with a fully automated intelligent load adjustment system that can calculate operational parameters and autonomously maintain balance without human intervention, marking a breakthrough in several key technologies for China's large-tonnage multifunctional offshore vessels, CMG reported.
Source: globaltimes
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