China has figured out a way to better track foreign submarines. Just force them to not be submerged. https://qz.com/915110/china-wants-foreign-submarines-to-s

China has figured out a way to better track foreign submarines. Just force them to not be submerged. https://qz.com/915110/china-wants-foreign-submarines-to-stop-traveling-below-the-surface-in-the-south-china-sea-and-other-waters-it-claims/ https://qz.com/915110/china-wants-foreign-submarines-to-stop...