Post #3213620

Russia is attacking us not just from space but also at the bottom of the sea. Elisa, the Finnish telecommunications company operating the submarine cables for the Nordic countries, installed an accoustic monitoring of the submarine cables in the Gulf of Finland. Distributed Acoustic Sensing uses the submarine cable as a sensor that measures vibrations in the reflections of light passing through the optical fibre on the seabed. https://news.cision.com/elisa-oyj/r/elisa--the-finnish-border-guard-and-the-finnish-navy-successfully-tested-the-securing-of-submarine-c,c4358350