| Is Missile: | yes |
| Terne III Mk8 | |
| Type: | Anti-submarine rocket |
| Manufacturer: | Kongsberg Defence & Aerospace and A/S Raufoss |
| Production Date: | 1950 (Terne I) |
| Service: | 1964 |
| Engine: | Solid-fueled Rocket
|
| Weight: | 135 kg |
| Length: | 1.95 m |
| Diameter: | 0.21 m |
| Wingspan: | 0.24 m |
| Vehicle Range: | 425-1600 m |
| Filling: | 50 kg |
| Guidance: | Unguided rocket + depth charge |
| Detonation: | Delay Fuse |
| 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 18m (59feet) apart, perpendicular to the target's course.