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Benjamin Franklin class submarine

The Benjamin Franklin-class of submarines (SSBN) were the first fleet ballistic missile submarines in the world. The class was superseded by the Ohio class SSBNs.

USS Kamehameha (SSN 642)[?] and USS James K. Polk (SSN 645)[?], the two remaining members of this class, have been reclassified as SSNs and converted to special operations attack submarines.

General Characteristics

  • Builders: Electric Boat
  • Displacement: 8,250 tons submerged
  • Length: 425 feet
  • Beam: 33 feet
  • Propulsion: S5W reactor[?]
  • Speed: 25+ knots submerged
  • Test Depth: Greater than 800 feet
  • Complement: 143
  • Armament:
    • four forward torpedo tubes
    • 12 vertical ballistic missile tubes



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