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| | U.S. Submarine Classes |
 | | Originally commissioned as ballistic missile submarines, the two remaining members of this class of submarine have been converted to special operations attack submarines, with a capacity for carrying and delivering special operations forces added. |
 | | Rapidly being phased out in favor of the LOS ANGELES and SEAWOLF Classes of attack submarines, this venerable and flexible workhorse of the submarine attack fleet brought the Cold War home to the enemies of freedom for over 25 years and continues to operate in the forward areas of the world to this day. |
 | | Of these, the final 23 hulls, referred to as "688I" (for improved), are quieter, incorporate an advanced combat system, and are configured for under-ice operations in that their forward diving planes have been moved from the sail structure to the bow and the sail has been strengthened for breaking through ice. |
| www.milnet.com /pentagon/subclass.htm (1612 words) |
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