All this is Russian hybrid-warfare.[1] The previous cable-cutting ship that was seized by Finland had so much radio equipment that it generators couldn't keep up. "RUSSIA-LINKED dark fleet tanker Eagle S (IMO: 9329760), seized by Finland on December 25 for damaging an undersea cable, had transmitting and receiving devices installed that effectively allowed it to become a “spy ship” for Russia, Lloyd’s List has learnt.

The hi-tech equipment on board was abnormal for a merchant ship and consumed more power from the ship’s generator, leading to repeated blackouts, a source familiar with the vessel who provided commercial maritime services to it as recently as seven months ago."[2]

[1] https://en.wikipedia.org/wiki/Hybrid_warfare [2] https://www.lloydslist.com/LL1151955/Russia-linked-cable-cut...