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China's 4,000-meter deep-sea profile buoy "floating star" made breakthrough progress
China Instrument Network Instrument R&D recently reported that the "Floating Star" 4,000-meter deep-sea self-sustaining profiling buoy, independently developed by the Ocean Buoy Team from the Qingdao Institute of Marine Engineering at Tianjin University, has successfully completed its sea trial. This marks a significant milestone in China's efforts to advance deep-sea observation technology and move closer to practical application.
The deep-sea self-sustaining profiling buoy is designed to drift with ocean currents, offering an easy-to-deploy, compact, and cost-effective underwater observation platform. It can perform adaptive adjustments, automatic diving, deep drifting, and surface floating across any ocean region. Equipped with various sensors—such as CTD (temperature, salinity, depth), dissolved oxygen, and ADCP (current profiler)—it efficiently collects accurate and comprehensive oceanographic data on a global scale. This technology plays a vital role in enhancing our understanding of the ocean and supporting future marine exploration.
In recent years, many countries have intensified their efforts in deep-sea ocean observation, focusing on depths below 2,000 meters to gain strategic advantages in the new wave of deep-sea competition. However, China only officially joined the Global Ocean Observing System at the beginning of the 21st century.
On July 28, the research team deployed the buoy in waters approximately 4,000 meters deep in the northern part of the South China Sea. By August 8, it had operated continuously and stably for 26 sections, reaching a maximum depth of 3,550.3 meters and achieving a data transmission success rate of 99.9%. This successful trial validated the feasibility and reliability of key technologies such as buoyancy drive, pressure design, and data acquisition and communication in 4,000-meter-depth environments. It also significantly advanced the development and practical application of China's self-sustaining profiling buoys in deep-sea conditions.
The project was led by Professor Li Xingfei from the Qingdao Institute of Marine Engineering at Tianjin University, with support from the "Qianhai Plan" special program at the National Laboratory for Marine Science and Technology in Qingdao.
(Source: Yangguang.com, Xinhuanet, Tianjin University)