Finland deploys new system to detect threats to undersea cables — distributed acoustic sensors measure vibrations from the seabed and informs the authorities and operators of suspicious activities

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https://www.tomshardware.com/tech-industry/finland-deploys-new-system-to-detect-threats-to-undersea-cables-distributed-acoustic-sensors-measure-vibrations-from-the-seabed-and-informs-the-authorities-and-operators-of-suspicious-activities