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The
BritishThe United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
Surface Ship Torpedo Defence (SSTD) system entered into service with the British
Royal NavyThe Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...
in 2004. The system is produced by
Ultra ElectronicsUltra Electronics Holdings is a British company serving the defence, security, transport and energy industries. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.-History:...
and is known as S2170 by the
Royal NavyThe Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...
and as Sea Sentor in the export market.
The system consists of
- an acoustic passive towed array
- a towed acoustic countermeasure (flexible)
- a single-drum winch
- a processing cabinet
- 2 display consoles
- 2 expendable acoustic device launchers (1 port, 1 starboard)
- 16 expendable acoustic devices (8 in each launcher)
The system is a foot-print compatible replacement for the
AN/SLQ-25 NixieThe AN/SLQ-25 Nixie and its variants are towed torpedo decoys used on US and allied warships. It consists of a towed decoy device and a shipboard signal generator...
system previously installed on British warships.
The passive acoustic towed array is specifically designed to detect torpedoes (unlike traditional ASW sonars) and has additional in-built non-acoustic as well as acoustic intercept sensors. Through advanced AI processing it is able to generically identify torpedoes as well as classify specific weapon types and modes and undertake threat evaluation and posturing analysis. The system provides tactical advice dependent upon the specific threat weapon, mode and posture to maximise vessel survivability, which typically involves vessel manoeuvres and also includes the deployment of countermeasures. The countermeasures - both towed and expendable variants - lure the threat away from the vessel in a soft-kill manner.
Ultra Electronics also produces a hard-kill variant known as the
TRAPR DCLThe US DCL demonstrator program is aimed at proving that an active torpedo detection system is able to resolve a salvo of torpedoes with sufficient time and accuracy that an anti-torpedo torpedo may be fired back to hit and destroy the threat.The DCL systems consist of an active source emitter...
system currently under development for the US Navy.