# Top 10 Most Advanced Nuclear Submarines: The 8th One Has a Shocking Diving Depth

7. ## Type 212CD

 

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The front-edge of conventional-nuclear hybrid technology is the German-Norwegian Type 212CD. For long missions, these submarines have a novel air-independent propulsion system coupled with a tiny nuclear reactor. Among the quietest submarines ever built, the vessel's innovative composite materials and unique acoustic tiles help to explain this silence. Its automatic fighting mechanism keeps stealth while tracking and attacking several targets at once.