China launches largest catamaran survey vessel for offshore energy work

Qiaoyuan is not a catamaran built to look fast in a brochure. The 76.36-metre survey vessel, launched at Taizhou Shipbuilding Enterprises in Jiangsu on May 22, 2026, was built for offshore energy work that demands a steady deck, long endurance and far less motion than a conventional monohull can usually provide.

That is the real story here. At 2,537 tonnes displacement and with a molded breadth of 23.80 metres, Qiaoyuan is the largest survey vessel by tonnage to be built in China, according to the reporting around its launch. It can carry 36 people for onboard operations and stay at sea for more than 60 days without resupply, which makes it a mission platform, not a quick inspection boat. The vessel was designed by the Bridge Survey and Design Institute of China Railway Construction Corporation, and the catamaran hull form was chosen for the obvious reason anyone who has worked around multihulls already knows: stability pays.

For offshore survey and drilling support, stability is not a luxury. CGTN said the twin-hull design supports stable operations in rough seas and high-precision offshore drilling, with a sampling success rate of over 90 percent. Wedoany reported that the catamaran arrangement reduces roll amplitude by more than 40 percent and allows operations in sea state 4. That is exactly the kind of number the energy sector pays for. A survey ship that can hold station longer, move less and keep its instruments happier saves time, fuel and a lot of operational frustration.

The fit-out reinforces that mission. Qiaoyuan carries a wave-compensated survey drilling rig, an integrated onboard laboratory and energy-saving control systems. Wedoany also said its core equipment is 100% domestically produced, a detail that matters in a ship built to support sea-crossing passages, deep-sea wind power and island infrastructure construction. In other words, this is a floating worksite meant to stay productive in conditions that would make plenty of other vessels back off.

The launch also fits a bigger industrial picture in Taizhou, where shipbuilders reported 27.65 billion yuan in output value in the first half of 2024, completed 70 ships totaling 5.83 million deadweight tons and won orders for 123 ships totaling 9.99 million deadweight tons. Taizhou’s municipal government calls the city China’s largest private shipbuilding base and a key export hub. Put alongside CSIS analysis that China now has the world’s largest fleet of civilian research vessels, Qiaoyuan looks less like a one-off and more like another step in a broader push toward high-end, domestically controlled ocean-survey capability. For catamaran design, that is the point: the same twin-hull advantages prized in leisure boats are now being scaled up for hard, wet, money-making work.