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"SDN:L22::TOOL1261" .
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"UnSpec sonobuoy" .
"UnSpec sonobuoy"@en .
"Unspecified sonobuoy"@en .
"accepted"@en .
"An expendable underwater listening device designed to be dropped from an aircraft or a ship and deploy upon water impact. Sonobuoys include hydrophone sensors which descend underwater and send detected signals to a radio transmitter mounted on an inflatable float which stays at the surface. The transmitter subsequently sends the signals to a monitoring unit for processing, analysis and classification."@en .