Chinese researchers have unveiled a new deep-sea tool capable of cutting through the world’s most secure subsea cables − and it has many in the West feeling a little jittery.
The development, first revealed in February 2025 in the Chinese-language journal Mechanical Engineering, was touted as a tool for civilian salvage and seabed mining. But the ability to sever communications lines 13,000 feet (4,000 meters) below the sea’s surface − far beyond the operational range of most existing infrastructure − means that the tool can be used for other purposes with far-reaching implications for global communications and security.
