Though relatively new compared to some of the other boats on this list, Russia has already started an upgrade project to develop Borei-A class submarines. While the Cold War yet raged, the USSR ...

SSGN was an improved variant of the Charlie I-class Soviet nuclear-powered cruise missile submarine. Entering service in the 1970s, it featured upgraded weapons and systems for enhanced anti-ship ...

K-141 Kursk was an Oscar-II class nuclear-powered cruise missile submarine of the Russian Navy, lost with all 118 hands when it sank in the Barents Sea on August 12, 2000. At 154m long and four ...