SPECIFICATIONS

Overall Length x Maximum Breadth:    311 ft. 9 in.  x  27 ft. 3 in.
Displacement:  2,025-2,060 tons Surfaced;  2,424 tons Submerged.
Operating Depth:  300 feet.
Watertight Compartments:  8 plus conning tower.
Pressure Hull Plating:  approx. 11/16 in. mild steel.
Torpedo Tubes:  6 bow; 4 stern;  max load = 24
Deck Guns:  1 3-in./50-cal.
Maximum Speed:  20.25 knots surfaced;  8.75 knots submerged.
Cruising Range:  11,000 miles surfaced at 10 knots.
Submerged Endurance:  48 hours at 2 knots.
Fuel Capacity:  94,400 gallons.
Patrol Endurance:  75 days.
Propulsion:  Diesel-electric reduction gear with 4 main generator engines,
             1 aux. generator.
             4 main motors with 5,400 shaft horse power.
             2 126-cell main storage batteries.


CONSTRUCTION:

Number of boats:  77 boats ordered between 1941 and 1943.
Builders:  Portsmouth (SS 275-280, 228-235);  Manitowoc (SS 265-274, 361-364);
           Electric Boat (SS 212-227, 240-264);  Mare Island (SS 236-239; 281-284)

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