The Ohio class of nuclear-powered submarines contains the USA Navy’s 14 ballistic missile submarines (SSBNs) and its 4 cruise missile submarines (SSGNs). Every displacing 18,750 tons submerged, the Ohio-class boats are the biggest submarines ever constructed for the U.S. Navy. They’re the world’s third-largest submarines, behind the Russian Navy’s Soviet-designed 48,000-ton Hurricane class and 24,000-ton Borei class. Ohio carries extra missiles than both: 24 Trident II missiles apiece, versus 16 by the Borei class (20 by the Borei II) and 20 by the Hurricane class.
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