HMS Active (F171)

HMS Active was a Type 21-class frigate of the Royal Navy. Built by Vosper Thornycroft, Southampton, England, she was completed with Exocet launchers in 'B' position, the first of the class to be so fitted.

For other ships with the same name, see HMS Active.

History
United Kingdom
NameHMS Active
BuilderVosper Thornycroft
Laid down23 July 1971
Launched23 November 1972
Commissioned19 July 1977
Decommissioned23 September 1994
IdentificationPennant number: F171
Motto
  • Festina lente
  • (Latin: "Hasten slowly")
FateTransferred to Pakistan Navy
Pakistan
NamePNS Shah Jahan
Acquired23 September 1994
FateSunk as Target on 12 January 2021
General characteristics
Class and typeType 21 frigate
Displacement3,250 tons full load
Length384 ft (117 m)
Beam41 ft 9 in (12.73 m)
Draught19 ft 6 in (5.94 m)
Propulsion
  • COGOG:
  • 2 × Rolls-Royce Olympus gas turbines
  • 2 × Rolls-Royce Tyne RM1A gas turbines for cruising
Speed32 knots (59 km/h; 37 mph)
Range
  • 4,000 nautical miles at 17 knots (7,400 km at 31 km/h)
  • 1,200 nautical miles at 30 knots (2,220 km at 56 km/h)
Complement177
Armament
  • RN:
  • 1 × 4.5 inch (114 mm) Mark 8 naval gun
  • 4 × Oerlikon 20 mm cannon
  • 4 × MM38 Exocet missiles
  • 1 × quadruple Sea Cat SAMs
  • 2 × triple ASW torpedo tubes
  • 2 × Corvus chaff launchers
  • 1 × Type 182 towed decoy
  • Pakistan:
  • 1 × 4.5 inch (114 mm) Mark 8 naval gun
  • 2 × Oerlikon 20 mm cannon
  • 1 × Phalanx CIWS
  • 2 × 4-cell Harpoon SSM launchers
  • 2 × triple STWS-1 torpedo launchers (for Mk 46 torpedoes)
  • 2 × Mark 36 SRBOC chaff launchers
  • 1 × Type 182 towed decoy
Aircraft carried1 × Westland Wasp helicopter, later refitted for 1 × Lynx
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