China is building a new diesel-electric submarine, open-source satellite imagery suggested, as it continues to enhance ...

Built in 1965, it simulated the operations of a nuclear reactor within a submarine submerged in water to mimic ocean conditions. It was responsible for training nearly 12,000 naval personnel in ...

The actions taken by just a handful of submarine commanders have left an outsized mark on the course of history.

With the vessel fully out of water, the pictures offer an amazing perspective on how massive and complex even an outdated class of nuclear submarine really is.