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  1. 100 YEARS OF BARROW-BUILT RN SUBMARINES, 1901-2001
  2. S CLASS, 1930-1963
  3.  
  4. MAIN PARTICULARS
  5.  
  6. Length overall                    217 ft
  7. Beam                                23 ft 6 in
  8. Depth                               11 ft
  9. Displacement,
  10.   surface                           872 tons
  11.   submerged                      990 tons
  12. Diving depth                      350 feet
  13. No. of shafts                     2
  14. Speed, surface:
  15.   design                            15 knots 
  16.   service                           14.75 knots 
  17. Speed, submerged:
  18.   design                            10 knots 
  19.   service                           9 knots 
  20. Endurance, surface:
  21.   design                            6000 miles at 10 knots
  22. Endurance, submerged:
  23.   design                            Details unknown
  24. Armament*                        6 21-inch bow tubes
  25.                                        1 21-inch stern tube
  26.                                        (13 torpedoes carried)
  27.                                        1 3-inch gun
  28.                                        3 0.303-inch machine-guns
  29.                                        1 20mm Oerlikon cannon
  30. Complement:
  31.   design                            48
  32.  
  33. * The armament of submarines of this class varied considerably.  For example: 23 boats were fitted with the six bow tubes only: 18 vessels, intended to operate in the Far East, had their 3-inch guns replaced by 4-inch guns: whilst, in some boats, the Oerlikon cannon replaced , rather than supplemented, the three machine guns.
  34.  
  35. ┬⌐ BAE SYSTEMS 2001