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James Madison-class

Fleet Ballistic Missile Submarines

41 FOR FREEDOM — IMPROVED ELECTRONICS 10 BOATS · SSBN-627 TO SSBN-636 · 1964
An improved Lafayette with upgraded navigation, fire control, and electronics. Ten boats that carried the sea-based nuclear deterrent through the height of the Cold War. Several upgraded from Poseidon to Trident I C-4 missiles, extending their strategic reach. Sam Rayburn and Daniel Webster still serve as moored training ships at Charleston.