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Russia’s ‘Twin-Hulled’ Titanium Sierra II Submarines Are Just Useless

Only two Sierra II submarines were completed due to high costs and complexity, limiting their impact despite advanced titanium hull technology, experts say.

Article Summary – Russia’s Sierra II-class attack submarines are often hyped as some of the most advanced boats ever built: titanium twin hulls, deep-diving performance, high speed, and low noise. On paper, they were designed as elite sub hunters for the Cold War, able to stalk U.S. submarines in harsh Arctic waters. In practice, they are strategic bit players. Sierra II-Class Submarine. Image Credit: Creative Commons. -Only two were ever comple…

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nationalsecurityjournal.org broke the news in on Monday, November 24, 2025.
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