Terne is a Norwegian
anti-submarine rocket
An anti-submarine rocket is an anti-submarine weapon type deployed on surface warships for the purpose of sinking or damaging submarines by small explosive charges. They are similar to anti-submarine mortar but a comparably more modern system. T ...
system, which uses rocket-thrown depth charges. It was developed by the
Norwegian Defence Research Establishment
The Norwegian Defence Research Establishment (''Forsvarets forskningsinstitutt'' – ''FFI'') is a research institute that conducts research and development on behalf of the Norwegian Armed Forces and provides expert advice to political and m ...
(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
A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited ...
.
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
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects o ...
detects a target, the fire-control system can fire a rocket salvo to place a string of depth charges apart, perpendicular to the target's course.
User countries
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See also
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Anti-submarine warfare
Anti-submarine warfare (ASW, or in the older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations ar ...
References
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Weapons of Norway
Cold War anti-submarine weapons of the United States
Cold War weapons of Germany
Naval weapons of Germany
Anti-submarine rockets