The Jiaolong, China's manned submersible, reached depths of 7,020 meters during its fourth dive into the Mariana Trench in the western Pacific Ocean in June. During the 11-hour dive, the ocea-nauts worked for almost three hours on the seafloor, placing markers and collecting water samples and sediments, state-run news agency Xinhua reported. The Jiaolong had succeeded in reaching depths of 6,671 meters, 6,965 meters and 6,963 meters in its previous three dives from June 15 to 22, surpassing the record of 5,188 meters it set last July. Submersibles from Russia and Japan have reached depths of 6,000 meters.
展开▼
