A Chinese ship has tested a new device capable of slicing through submarine data cables thousands of meters beneath the ocean surface. That demonstration may exacerbate security concerns over a spate of suspected sabotage incidents targeting undersea communications and power cables from the Baltic Sea to the Pacific Ocean.

The trial took place at a depth of 11,483 feet (3,500 meters) during a deep-sea science expedition involving the Chinese research ship named Haiyang Dizhi 2, according to the South China Morning Post . That ship is equipped with a 150-ton crane, a 10-kilometer fiber optic winch, and a helicopter landing platform. It has shown the capability to deploy deep-sea remotely operated vehicles in previous missions .

The South China Morning Post cited a report in the China Science Daily, an official, Chinese-language news publication run by the Chinese Academy of Sciences. The latter claimed that “the sea trial has bridged the ‘last mile’ from deep-sea equipment development to engineering application.”

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