EntityQ891275· pop 5· linked from 142 articlesBoldSign in to saveDevice used by Nazi Germany to distract Allied sonar operatorsConnectionsWorld War IIConceptNazi GermanyConceptInternational Standard Book NumberEntitysonarEntityRoyal NavyEntitysea waterEntitytabletEntitycolloquial languageEntityU-boatEntitycalcium hydrideEntitykoboldEntitysonar decoyEntityCategoriesSonar decoysU-boatsWeapons countermeasures