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Titanic sub search: What are the sonobuoys that picked up underwater noises? | Science & Tech News
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Eighty years after they were deployed for the first time to detect Nazi submarines during the Second World War, sonobuoys are aiding the hunt for missing Titanic explorers. The underwater sonar devices picked up banging noises in the area where the Titan submersible vanished, as searches continue for the vessel that dropped off the radar…