Sweden Intensifies Crackdown on Stateless Vessels Linked to Russia

Swedish authorities are escalating their efforts to address unseaworthy vessels suspected of being part of Russia's shadow fleet. This intensified crackdown has led to the boarding of two vessels within a week, with the most recent incident occurring on March 12, 2025. The Swedish Coast Guard, in collaboration with police, intercepted the product tanker Sea Owl I, which was reportedly operating under a false flag. The operation involved a police helicopter and a speedboat, stopping the tanker off Trelleborg.

The Maritime Executive

The Sea Owl I, built in 2007 and measuring 228 meters (748 feet), was claiming to operate under the Camaros flag since 2025. However, authorities suspect this registration is fraudulent. The vessel is owned by a corporation based in the Marshall Islands and has a history of transporting oil products between Russia and Brazil. It was sanctioned by the European Union in October 2024 and by the UK in October 2025 for its involvement in the Russian oil trade. The ship was reportedly en route from Santos, Brazil, to Primorsk, Russia, despite its Automatic Identification System (AIS) indicating a destination of Tallinn, Estonia.

The Maritime Executive

Swedish authorities have cited significant safety deficiencies as the basis for the intervention. The Sea Owl I had its classification withdrawn in October 2024, with its last inspection recorded in 2023. Daniel Stenling, Deputy Chief of Operations for the Swedish Coast Guard, stated, “Our overall assessment is that the risk of safety deficiencies on board is too high. On this basis, the vessel cannot be allowed innocent passage.” Investigations are currently focused on the vessel's seaworthiness, but could expand as more authorities become involved. Crewmembers are being interviewed, and searches are being conducted on board to investigate suspected false documentation.

The Maritime Executive

The preliminary investigation has now been broadened to include the master of the Sea Owl I, a Russian citizen, who is suspected of presenting false documents, a felony under Swedish law. This incident follows the earlier detention of the cargo ship Caffa on March 6, 2025, which was also found to be sailing under a false flag. The captain of the Caffa is similarly under detention for allegedly providing multiple false documents to authorities, with the ship being held due to safety deficiencies identified during a Port State inspection.

The Maritime Executive

While Swedish authorities maintain that these actions are necessary for maritime safety and environmental protection, critics argue that such crackdowns may escalate tensions with Russia and complicate international maritime relations.

The Maritime Executive

• “Our overall assessment is that the risk of safety deficiencies on board is too high. On this basis, the vessel cannot be allowed innocent passage. The threats to maritime safety and the environment are too high. Therefore, there is a basis for an intervention against the ship,” — Daniel Stenling, Deputy Chief of Operations, Swedish Coast Guard.

The Maritime Executive

• “They are saying they suspect the master presented false documents, which is a felony under Swedish law.” — Adrien Combier-Hogg, Senior Prosecutor.

The Maritime Executive