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The "Customs 201G," a small waterline catamaran designed by the 702 Research Institute, recently completed its testing and was officially handed over to users along the Guangdong coast. This vessel is groundbreaking as it is the first in the world to use a hybrid structure combining steel and glass-reinforced plastic. It also features a domestically produced MTU8V396 diesel engine weighing over 250 tons. Renowned experts, including Wu Yousheng, an academician of the Chinese Academy of Engineering, and Cai Daming, the party secretary of the 702th, were present during the trial and final acceptance.
The original "Customs 201" was delivered to Shenzhen Customs in 2001 and was primarily used for anti-smuggling operations and monitoring three islands. In March of this year, the user requested a major overhaul, transforming the ship from a surveillance vessel into a traffic control ship. The modifications included a central hollow design, modern navigation and communication systems, VIP lounges, meeting rooms, and enhanced safety features. The upgraded version can now accommodate around 20 crew members. Despite the increased weight by 18.3 tons, the question remained: could the speed and safety of the "Customs 201G" still match the original? Although the shipowners had confidence in the 702 team, they still required a formal pledge from the institute.
Within just over three months, the entire development team at 702 worked tirelessly, maintaining high standards of precision and attention to detail. Every component was carefully examined, and every step—from initial design to simulation testing, and from actual reconstruction to project progress—was meticulously handled. After more than 100 days of dedicated effort, the team successfully completed the modification. According to estimates, the "Customs 201G" now has a displacement increase of 13.3 tons compared to the original "Customs 201," while maintaining all key technical specifications.
During its sea trials in the South China Sea, near Sanmen Island at coordinates 22°N, 16°E, with a water depth of 23 meters and wave height of 3, the "Customs 201G" achieved speeds of 18 knots at 2000 RPM and 18.1 knots at 2100 RPM—an improvement of 1 knot over the previous model. The shipowner was particularly impressed by the stability and safety of the vessel at these speeds.
The successful transformation of the "Customs 201G" marks a significant milestone in the evolution of the 702 Research Institute’s small waterplane catamaran technology, showcasing their continued innovation and engineering excellence.