When Russia launched its latest nuclear submarine the Khabarovsk last month from the Arctic port of Severodvinsk, it caused a stir in defence circles.
While the new “doomsday” Poseidon nuclear torpedoes are theoretically capable of unleashing a radioactive tsunami, submarine specialists have also focused on its advanced noise-proofing technology.
New pump-jet propulsion, composite hull coatings and improved reactor coolant pumps in recent decades have sharply reduced the acoustic signatures on Russian nuclear submarines to the point where they are nearly inaudible.
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