China has deployed a fleet of underwater drones called Sea Wing (Haiyi) glider in the Indian Ocean, which can operate for months on end and make observations for naval intelligence purposes, according to defence analyst HI Sutton.
The United States has asked China to "immediately" return its unmanned naval probe in international waters in the South China Sea which it alleged has been "unlawfully" seized by them.
The American oceanographic survey ship which controls the underwater drone seized by China had been spying against the Communist nation posing a threat to Chinese naval ships in the South China Sea, a state-run daily has said while claiming that such activities by the US Navy were "very rampant" in the strategic region.
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