SSBN-640 Benjamin Franklin-Class FBM Submarines
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| Builders: | General Dynamics Electric Boat Division. Mare Island Naval Shipyard Newport News Shipbuilding |
| Power Plant: | One S5W nuclear reactor two geared steam turbines, 15,000 SHP, one shaft |
| Length: | 425 feet (129.6 meters) |
| Beam: | 33 feet (10.06 meters) |
| Displacement: | light 6,650 tons standard 7,250 tons submerged 8,250 tons |
| Speed: | surface: 20+ knots (23+ miles per hour, 36.8 +kph) submerged: 25 knots |
| Crew: | 13 Officers, 130 Enlisted |
| Armament: |
16 - tubes for Polaris and Poseidon 4 - torpedo tubes with Mk48 Torpedoes |
| Sensors: |
BPS-11A or BPS-15 surface-search radar BQR-7 sonar BQR-15 towed-array sonar BQR-19 sonar BQR-21 sonar BQS-4 sonar |
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