Large diesel-electric submarine Black hole Tested and reliable submarine you can trust ► Powerful and well-balanced armament; ► Low noisiness, small sonar and radar trace; ► High survivability and reliability; ► Well-mastered building technologies; ► Substantial service experience in different fleets around the world. Project 636 is the further development of the world-famous Kilo-class submarines. Being based on rich experience and the best Russian traditions of the submarine shipbuilding Project...