Schematic cross-section of the submarine tunnel
https://akkoma-media.obj.krvtz.net/akkoma-media/60a65baeb84657b93e15484d736c1901be94ca7abb8b87b6ac5f567f2c286b4d.png?name=VmTZ7ZENRYulPg.png
After lengthy planning and permissions process, #Poland started actual construction work on three off-shore wind farms on #Baltic sea totaling 3 GW installed power. In engineering terms, an interesting solution is a 1.5 km submarine tunnel 40 m below sea bottom for the high current cables to avoid damage on shallow waters.
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