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Prairie-Masker is a radiated noise reduction system fitted to some western warships, including the Oliver Hazard Perry-class frigates, Spruance and Arleigh Burke-class destroyers, and the Ticonderoga-class cruisers of the US Navy. The system was also installed during the 1960s on a limited number of post WWII Guppy III modified, and later diesel submarines.

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  • Prairie-Masker (de)
  • Prairie Masker (it)
  • Prairie-Masker (en)
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  • Das Prairie-Masker-System wird bei militärischen Schiffen eingesetzt, um ihre abgestrahlten Geräusche zu vermindern. Dadurch wird ihre Ortung durch feindliches Sonar erschwert. Das Prairie/Masker-System besteht aus zwei Komponenten, die für gewöhnlich nur zusammen eingesetzt werden: (de)
  • Prairie-Masker is a radiated noise reduction system fitted to some western warships, including the Oliver Hazard Perry-class frigates, Spruance and Arleigh Burke-class destroyers, and the Ticonderoga-class cruisers of the US Navy. The system was also installed during the 1960s on a limited number of post WWII Guppy III modified, and later diesel submarines. (en)
  • Il Prairie - Masker è un sistema di riduzione dell'emissione sonora in acqua installato su alcune unità navali della Marina degli Stati Uniti d'America, tra cui la Classe Spruance, la Classe Arleigh Burke e la Classe Ticonderoga (incrociatore), il sistema ha lo scopo di ridurre la possibilità di scoperta e tracciamento da parte dei sistemi sonar attivi e dei sistemi di riconoscimento acustico passivi. (it)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/USS_Churchill_propeller.jpg
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  • Das Prairie-Masker-System wird bei militärischen Schiffen eingesetzt, um ihre abgestrahlten Geräusche zu vermindern. Dadurch wird ihre Ortung durch feindliches Sonar erschwert. Das Prairie/Masker-System besteht aus zwei Komponenten, die für gewöhnlich nur zusammen eingesetzt werden: (de)
  • Prairie-Masker is a radiated noise reduction system fitted to some western warships, including the Oliver Hazard Perry-class frigates, Spruance and Arleigh Burke-class destroyers, and the Ticonderoga-class cruisers of the US Navy. The system was also installed during the 1960s on a limited number of post WWII Guppy III modified, and later diesel submarines. The Masker and Prairie systems are designed to prevent the classification or identification of a warship's acoustic signature by another vessel, i.e. by a hostile submarine. Instead of hearing machinery, the ship sounds similar to rain on passive sonar. The Masker portion of the system is installed onto the hull of a vessel, usually near its machinery spaces. The Prairie portion of the system is designed to silence the vessel's propellers. Originally classified top secret, these systems are now used by several countries as part of their antisubmarine warfare systems. (en)
  • Il Prairie - Masker è un sistema di riduzione dell'emissione sonora in acqua installato su alcune unità navali della Marina degli Stati Uniti d'America, tra cui la Classe Spruance, la Classe Arleigh Burke e la Classe Ticonderoga (incrociatore), il sistema ha lo scopo di ridurre la possibilità di scoperta e tracciamento da parte dei sistemi sonar attivi e dei sistemi di riconoscimento acustico passivi. La parte denominata Masker è costituita da due bande finemente forate installate sulla superficie dello scafo in corrispondenza dei motori della nave. Viene insufflata aria compressa che forzata attraverso i piccoli fori praticati nelle bande produce una scia di bolle d'aria tutto attorno allo scafo in navigazione. Le bolle d'aria costituiscono una barriera per le onde sonore a bassa frequenza prodotte dai motori. Il sistema detto Prairie funziona sulla base dello stesso principio ma viene installato sulle eliche della nave. Il sistema ha la principale funzione di impedire l'identificazione della traccia sonora della nave da parte di unità sottomarine ostili attraverso l'analisi delle onde sonore emesse. (it)
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