Jin-class Submarine

China's apparent construction of a third airstrip on its man-made islands in the disputed South China Sea could fill a gap in Beijing's anti-submarine defences, complicating operations for the US Navy and its allies, Chinese and Western experts said.

China's apparent construction of a third airstrip on its man-made islands in the disputed South China Sea could fill a gap in Beijing's anti-submarine defences, complicating operations for the US Navy and its allies, Chinese and Western experts said.