China’s largest fully revolving semi-submersible crane vessel, Sihang Yongsheng, has been delivered in Jiangmen, Guangdong Province, adding another major piece of offshore engineering equipment to support the country’s development as a strong maritime nation.

Sihang Yongsheng was built by CCCC Fourth Harbor Engineering Co., Ltd.’s Jiangmen Hangtong Shipbuilding and Offshore Engineering Co., Ltd. According to Li Haifeng, Deputy General Manager of the company, the vessel measures 110 metres in length, 43.8 metres in beam, and 8 metres in depth. It features a 4,800-square-metre continuous flat deck and is classed by the China Classification Society.

Integrating multiple functions, including semi-submersible transportation and fully revolving lifting operations, Sihang Yongsheng is equipped at its stern with a fully revolving luffing crane with a maximum lifting capacity of 2,200 tonnes. The vessel can carry out heavy lifting operations and transport oversized and overweight offshore structures weighing up to 20,000 tonnes, making it a major piece of equipment for port, hydraulic, and offshore construction projects.

Li Haifeng noted that the vessel is equipped with a fully automated intelligent ballast adjustment system. Based on multidimensional data, including real-time sea conditions, vessel attitude, and lifting loads, the system can calculate the optimal ballast adjustment plan and precisely regulate the draught and inclination angle of different sections of the vessel.

This enables autonomous balance control without human intervention, significantly improving the safety, stability, and precision of offshore lifting and loading operations, while further enhancing overall operational safety at sea.

Following its completion and delivery, Sihang Yongsheng will strengthen China’s comprehensive support capabilities for the construction of cross-sea bridges, ports, and terminals. It will also support major projects in emerging fields, including deep-sea and offshore wind power development, the large-scale construction of marine ranches, and deep-sea resource exploration.

Publication Date:
July 8, 2026

Authors:
Zhou Ying and Huang Guobao

Source:
Xinhua News Agency / XinhuaNet

Original Link:
https://www.news.cn/politics/20260708/36b25ccff0484a79a21bf4ff34058b81/c.html?