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Spearfish torpedo

Weapon information
NameSpearfish
Service history
In service1992 � present
Production history
ManufacturerBAE Systems Underwater Systems
Produced1988 � 2003
Specifications
Weight1,850 kg (4,075 lb)
Length7 m (23 ft)
Diameter533 mm (21 in)
Maximum range54 km (30 nm) at low speed
23 km (12.5 nm) at high speed
FillingAluminised PBX explosive
Filling weight300 kg (660 lb)
Detonation
mechanism
Proximity or contact detonation
EngineSundstrand gas-turbine with pump-jet
PropellantHAP / Otto fuel II
Speed80 kn (148.2 km/h) (1994 version on short range setting)
Guidance
system
Wire-guided with autonomous active terminal homing sonar

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The Spearfish torpedo (formally Naval Staff Target 7525) is the heavy torpedo used by the submarines of the Royal Navy. It can be guided by wire or by autonomous active or passive sonar, and provides both anti-submarine warfare (ASW) and anti-surface ship warfare (ASuW) capability.

It replaces the unreliable Tigerfish torpedo, which was withdrawn in 2004; the significantly higher speed of the Spearfish was intended to catch high-speed, deep-diving Soviet threats such as the .


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