General Characteristics Displacement: 4750 tons surfaced, 5208 tons submerged Length: 85.4 meters Beam: 9.8 meters Draught: 9.5 meters Complement: 18 officers, 112 ratings Armament: five tubes capable of firing: Spearfish torpedoes Tigerfish torpedoes RN Sub Harpoon missiles Tomahawk missiles (Trafalgar and Triumph only) Sensors: sonar (bow, flank, active intercept, and towed arrays) periscopes (attack and search) collision avoidance radar