HMS Vigilant (S30)

	Returning from patrol April 2014
History
United Kingdom
Name	HMS Vigilant
Laid down	16 February 1991
Launched	14 October 1995
Commissioned	2 November 1996
Homeport	HMNB Clyde
Status	In active service
Badge
General characteristics
Class & type	Vanguard-class submarine
Displacement	15,900 tonnes, submerged
Length	149.9 m (491 ft 10 in)
Beam	12.8 m (42 ft 0 in)
Draught	12 m (39 ft 4 in)
Propulsion	1 × Rolls-Royce PWR2 nuclear reactor; 2 × GEC turbines; 27,500 shp (20.5 MW); 1 × shaft, pump jet propulsor; 2 × auxiliary retractable propulsion motors; 2 × WH Allen turbo generators (6 MW); 2 × Paxman diesel alternators; 2,700 shp (2.0 MW);
Speed	In excess of 25 knots (46 km/h; 29 mph), submerged
Range	Only limited by food and maintenance requirements.
Complement	135
Sensors &; processing systems	BAE Systems SMCS; Kelvin Hughes Type 1007 I-band navigation radar; Thales Underwater Systems Type 2054 composite sonar suite comprising: ; Marconi/Ferranti Type 2046 towed array sonar ; Type 2043 hull-mounted active and passive search sonar ; Type 2082 passive intercept and ranging sonar; Pilkington Optronics CK51 search periscope; Pilkington Optronics CH91 attack periscope;
Electronic warfare; & decoys	Two SSE Mk10 launchers for Type 2066 and Type 2071 torpedo decoys; RESM Racal UAP passive intercept;
Armament	4 × 21-inch (533 mm) torpedo tubes for: Spearfish heavyweight torpedoes; 16 × ballistic missile tubes for: Lockheed Trident II D5 SLBMs with up to 12 MIRVed Holbrook Mk-4A (100 ktTNT) nuclear warheads each;

HMS Vigilant is the third Vanguard-class submarine of the Royal Navy. Vigilant carries the Trident ballistic missile, the United Kingdom's nuclear deterrent.