Terne ASW

Terne III Mk8

Terne III Mk.8 ASW system opening its clam gate
Type Anti-submarine weapon
Service history
In service 1964
Production history
Manufacturer Kongsberg Defence & Aerospace and A/S Raufoss
Produced 1950 (Terne I)
Specifications
Weight 135 kg
Length 1.95 m
Diameter 0.21 m
Warhead 50 kg
Detonation
mechanism
 Delay Fuse
Engine Solid-fueled Rocket; 52 kN (11700 lb)
Wingspan 0.24 m
Operational
range
 425-1600 m
Guidance
system
 Unguided rocket + depth charge
Launch
platform
 Land and Naval ships

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 depth charge.

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 yd) apart, perpendicular to the target's course.

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