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Text File  |  2001-04-24  |  776b  |  31 lines
  1. MAIN PARTICULARS        Porpoise Class
  2.  
  3. Length overall                 289 ft
  4. Beam                        29 ft 10 1/4 in
  5. Depth, pressure hull            16ft 9 in
  6. Displacement,
  7.     surface                    1768 tons
  8.     submerged                2053 tons
  9. Diving Depth                300 ft
  10. No. of Shafts                2
  11. Propellers                    Details unknown
  12. Speed, surface:
  13.     design                    15 knots
  14.     service                    16 knots
  15. Speed, submerged:
  16.     design                    8.75 knots
  17.     service                    8.9 knots
  18. Endurance, surface:
  19.     design                     12 800 miles (maximum) 
  20.     service                    3860 miles (full power)
  21.                             11 500 miles at 8 knots
  22. Endurance, submerged:
  23.     design                    64 miles at 4 knots
  24.     service                     8 miles at 9 knots
  25.                             66 miles at 6 knots
  26. Armament                    6 21-inch bow tubes
  27.                             (12 torpedoes carried)
  28.                             1 4-inch gun
  29.                             50 Mk XVI mines
  30. Complement
  31.     design                    59