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BEIJING -- China"s unmanned submersible Qianlong II has completed 50 dives since its commission, and will have a technology upgrade soon, scientists said.
The undersea vehicle, which is capable of diving to 4,500m, made its 50th dive on April 6 in the Indian Ocean, a part of China"s 49th ocean expedition.
Of the 50 dives , 35 were in the Indian Ocean and 15 in the South China Sea, according to China Ocean Mineral Resources R&D Association.
In the southwest Indian Ocean alone, Qianlong II has traveled more than 2,000 km, they said.
The submersible, which first went underwater in 2015, is used for exploring deep-sea mineral resources.
"Its operations have become more stable after 50 dives," said Xu Chunhui, a scientist tasked with equipping the submersible.
Xu said a part of the upgrade will allow the submersible to work without the presence of its mother vessel. A new unmanned monitoring device will track the submersible, freeing the mother vessel for other activities.uv bracelet motivational bracelets for athletes fabric wristbands tyvek wristbands london wristband design