China develops robot to reach deepest point on Earth, US falls behind

(CLO) China has just announced a mini deep-sea robot that can operate in the Mariana Trench - the deepest ocean trench on Earth, marking a breakthrough in the ocean technology race.

In the western Pacific , at the strategic gateway to the second island chain, lies the deepest point on Earth – the Mariana Trench. In this dark world, China has just announced a technological breakthrough: a tiny drone no bigger than a briefcase, capable of operating at depths that even the US Navy cannot reach.

A deep-sea drone is deployed to swim into the Mariana Trench. Photo: Beihang University

Developed by scientists at Beihang University in Beijing, the robot uses smart metal actuators that convert extreme water pressure into thrust, allowing it to swim, glide and crawl through the 10.7km deep Mariana Trench – where the pressure is equivalent to carrying a giant iceberg on its back.

The landmark study, published in Science Robotics last week, shows the growing gap between China and the US in deep-sea technology. In 2024 alone, China made 246 deep-sea dives – more than all other countries combined – while the US still relies on its 61-year-old Alvin submarine, which can only dive to 6,500 metres.

Professor Wen Li's team's robot uses shape-memory alloys to help its actuators operate more efficiently under extreme pressure. When tested in the Mariana Trench, it was able to swim for 12 seconds, travel 0.4 meters, and crawl 32 mm in 6 seconds. After completing the task, the robot was recovered intact.

The team also developed a soft gripper using the same SMA material that can collect marine organisms such as starfish, sea urchins and sea cucumbers from the ocean floor. They hope this research will pave the way for the next generation of miniature robots that can help explore the deep sea and interact with ocean ecosystems.

Diagram showing how the drone moves. Photo: Beihang University

China’s Mariana Trench Environmental and Ecological Research (MEER) program is also making progress. Between 2020 and 2024, the Shenhai Yongshi (Deep Sea Warrior) and Fendouzhe (Striver) submarines completed 1,116 dives, taking 1,200 scientists to unprecedented depths. In 2024 alone, Fendouzhe made 31 dives over 37 days, including seven trips to depths of more than 9,000 meters.

Meanwhile, the US still relies heavily on Alvin, a manned submarine famous for its 5,200 dives in history, which has explored hydrothermal vents, searched for missing hydrogen bombs and surveyed the wreck of the Titanic. However, after many outages for repairs and upgrades, Alvin has gradually revealed its limitations compared to China's advanced unmanned underwater vehicles.

At the current rate of development, China's deep-sea technology could change the landscape of ocean research, and pose a major challenge to the US in the undersea technology race.

Ngoc Anh (according to SCMP, Science Robotics)

Source: https://www.congluan.vn/trung-quoc-phat-trien-robot-lan-dau-cham-den-diem-sau-nhat-trai-dat-post340151.html