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.

As well as Eagle S, another related tanker from the same ownership cluster, UK-sanctioned Swiftsea Rider (IMO: 9318539), also had similar equipment installed, Lloyd’s List was told.

Cook Islands-flagged Eagle S and Honduras-flagged Swiftsea Rider are two of 26 elderly Russia-linked tankers with opaque ownership structures connected to three related shipmanagers, including two sanctioned by the UK government 12 months ago for “propping up Putin’s war machine”.