One thing we know about Ohio is it really is like five Ohios.

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And the successor class will need to be even stealthier than the very quiet Ohios, as a hedge against the danger that future breakthroughs in sensors and information processing might make it easier for adversaries to track undersea warships.

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They also converted the first four vessels in the class to cruise-missile launchers with no nuclear role after the Cold War ended, which is why there are only 14 Ohios carrying ballistic missiles today rather than the 18 that were built.

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