HMS Vigilant (S30)

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Vanguard class submarine
Career (UK) Royal Navy Ensign
Laid down: Unknown
Launched: October 1995
Commissioned: November 1996
Status: active in service
Homeport: HMNB Clyde
General Characteristics
Displacement: Dived: 15,680 tons
Length: 149.9 m
Beam: 12.8 m
Draught: 12 m
Propulsion: 1 × Rolls-Royce PWR2 nuclear reactor
2 × GEC turbines
1 × shaft pump jet
 27,500 hp (20.5 MW)
2 × auxiliary retractable propulsion motors
2 × W H Allen turbo generators
 6 MW
2 × Paxman diesel alternators
 2 × 2,700 hp (20.5 MW)
Speed: Dived: 25 knots (46 km/h)
Range: Essentially unlimited
Complement: 14 officers
121 enlisted
Sensors and processing systems: BAE Systems SMCS
Thales Underwater Systems Type 2054 composite sonar suite comprising:
 Type 2046 towed array sonar
 Type 2043 hull-mounted active and passive search sonar
 Type 2082 passive intercept and ranging sonar
1 × Kelvin Hughes Type 1007 I band navigation radar
1 × Pilkington Optronics CK51 search periscope
1 × Pilkington Optronics CH91 attack periscope
Electronic warfare and decoys: Thales UPM intercept ESM
2 × Mk10 launchers for launching Type 2066 and Type 2071 decoys
Armament: 4 × 21 in (533 mm) torpedo tubes
16 × ballistic missile tubes
Spearfish torpedoes
16 × Lockheed Trident D5 SLBMs carrying up to 128 warheads

HMS Vigilant (S30) is the third Vanguard class submarine of the Royal Navy. Vigilant carries the Trident ballistic missile, the UK's nuclear deterrent.

Vigilant was built at Barrow-in-Furness by Vickers Shipbuilding and Engineering Ltd (now BAE Systems Marine), was launched in October 1995, and commissioned in November 1996.

In 2002, protestors from Trident Ploughshares breached security at Faslane Naval Base where the Vanguard submarines are based. Two protestors managed to spraypaint Vigilant with the CND symbol and the word "Vile".

General Characteristics

  • Displacement: 16,000 tons submerged
  • Propulsion: Rolls-Royce PWR2 reactor, two GEC turbines, single shaft, pump jet propulsor
  • Electrical Power: two Paxman diesel generators, two WH Allen turbogenerators
  • Speed: 25 knots (46 km/h) submerged
  • Complement: 14 officers, 121 men
  • Strategic Armament: 16 Lockheed Trident II D5 ballistic missiles
  • Defensive Armament: four 533 mm (21-inch) torpedo tubes, Spearfish torpedoes


Vanguard-class submarine

Vanguard | Victorious | Vigilant | Vengeance

List of submarines of the Royal Navy
List of submarine classes of the Royal Navy
White Ensign of the Royal Navy
Commissioned Royal Navy Ships
Union Jack of the Royal Navy
List of Royal Navy ships

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