Main Page | See live article | Alphabetical index The Royal Navy's Vanguard class of nuclear ballistic missile submarines (SSBNs) includes four boats: Vanguard (S28), Victorious (S29), Vigilant (S30), and Vengeance (S31). General Characteristics Displacement: 15,900 tons submerged Length: 149.9 meters Beam: 12.8 meters Draught: 12 meters Complement: 14 officers, 121 ratings Armament: 16 missile tubes capable of firing Trident D5 missiles four torpedo tubes capable of firing Spearfish torpedoes Sensors: sonar (bow, flank, active intercept, and towed arrays) periscopes: (attack and search) collision avoidance radar This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.