After some much-needed upgrades and a full series of tests, one of the U.S. Navy's most capable subs is now back in service.

Ohio-class SSGNs (guided-missile submarines) are nearing their retirement window. Converted from SSBN (ballistic missile) ...

Russian Defense Minister Andrei Belousov attended the launching ceremony on Saturday and said the heavy nuclear-powered missile cruiser Khabarovsk, “will enable us to successfully secure Russia's ...

The black hull of China's Type 094 attack submarine stands at port. - The Wall Street Journal/YouTube The world's largest naval force continues to bolster its fleet, this time adding a new class of ...

Submarines have become one of the most powerful and least visible forces in modern warfare. Capable of operating undetected for months while carrying advanced missiles and torpedoes, these vessels ...

Add Yahoo as a preferred source to see more of our stories on Google. March 21 (Reuters) - A British nuclear-powered submarine equipped with Tomahawk cruise missiles ‌has taken position in the ...