Terne ASW

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Terne III Mk8
Under fire tests 18. mai 1962 Key West, Florida, the world's first nuclear-powered vessel, the submarine USS Nautilus (SSN-571) was hit by this Terne rocket.
Under fire tests 18. mai 1962 Key West, Florida, the world's first nuclear-powered vessel, the submarine USS Nautilus (SSN-571) was hit by this Terne rocket.
Basic data
Function Anti-submarine weapon
Manufacturer Kongsberg Defence & Aerospace and A/S Raufoss
First flight 1950 (Terne I)
Entered service 1964
General characteristics
Engine Solid-fueled Rocket; 52 kN (11700 lb)
Launch mass 135 kg
Length 1.95 m
Diameter 0.21 m
Wingspan 0.24 m
Speed
Range 425-1600 m
Warhead 50 kg
Guidance Unguided Rocket + Torpedo Acoustic homing
Fuzes Delay Fuse
Launch platform Land and Naval ships
Terne III Mk.8 ASW system onboard an Oslo-class firgate
Terne III Mk.8 ASW system onboard an Oslo-class firgate

Terne is a Norwegian Anti-submarine weapon system, which uses rocket-thrown depth charges. It was developed by the Norwegian Defence Research Establishment (FFI) in cooperation with the U.S. Navy in the late 1940s-early 1960s. The Terne development project consisted of three phases:

Terne I  : Development of a rocketborn depthcharge.

Terne II : Development and construction of a landbased ASW for naval defense.

Terne III: Development and construction of a shipborne ASW.


A Terne III weapon system consists of a search & track sonar, a fire-control system and the rocket launchers, which can store six salvos of six rockets each. The rocket itself, is a depth charge with multiple fusing modes (preset time after water entry, proximity, or contact), which is propelled through the air by a solid-fueled rocket motor. When the sonar detects a target, the fire-control system can fire a rocket salvo to place a string of depth charges 18 m (20 yds) apart, perpendicular to the target's course.


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