What You Need to Know: In 2005, the USS San Francisco, a Los Angeles-class nuclear-powered submarine, collided with an uncharted underwater mountain near Guam during a training mission.

Although the U.S. currently has a larger and vastly superior fleet of nuclear-powered submarines, there is no question Xi’s nuclear submarine construction enterprise is striving to catch up.

An accident on board a Chinese conventional submarine has killed all of its 70 officers and crew, the official Xinhua news agency said today. The accident, which occurred in Chinese territorial ...

The cases investigated include damage to submarine cables in the Baltic Sea and off the Finnish coast in November and at Christmas. Claims from Russia that the damage was not caused intentionally ...