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SSN(X) Needs Clean Sheet Design, Navy Official Says

The next-generation submarine will emphasize speed, stealth and unmanned systems, with the Congressional Budget Office estimating about $9 billion per boat.

Summary by Inside Defense
A clean sheet design is required for the next-generation attack submarine in order to dominate peer threats in the future, a Navy official said today. The Navy is currently in the process of determining requirements for the new submarine, SSN(X), Rear Adm. Andrew Miller, director of the undersea warfare division, said Thursday at the annual Naval Submarine League conference. In November 2025, the Navy completed its analysis of alternatives for S…

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With a view to extending its attack capability beyond its own hull, the U.S. Navy plans that its future SSN(X) nuclear attack submarine will operate as a submarine drone mothership, capable of deploying and directing its operations. To this end, it defined five priority capabilities: higher speed, operational availability, offensive capability, furtivity [...]

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Inside Defense broke the news in Arlington, United States on Friday, November 13, 2026.
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