The Era of Total U.S. Submarine Dominance Over China Is Ending

For decades, the U.S. hasn’t had to worry much about China’s submarines. They were noisy and easy to track. The Chinese military, meanwhile, struggled to detect America’s ultraquiet submarines.

Now, China is narrowing one of the biggest gaps separating the U.S. and Chinese militaries as it makes advances in its submarine technology and undersea detection capabilities, with major implications for American military planning for a potential conflict over Taiwan.