Swedish Coast Guard Boards Second Stateless Russian Shadow Fleet Tanker in One Week

The Swedish Coast Guard boarded the tanker Sea Owl I off the coast of Trelleborg, identifying it as the second stateless vessel intercepted in the Baltic Sea within a single week. The ship was flying the flag of the Comoros, but Swedish authorities suspect it is actually a stateless vessel operating under a false flag. Officials believe the Sea Owl I is part of the Russian shadow fleet, a network of ships used to circumvent international sanctions. This vessel is already included on several sanctions lists, including those issued by the European Union. Carl-Oskar Bohlin, the Swedish Minister for Civil Defence, confirmed that the operation was part of increased maritime surveillance. The boarding follows a similar incident involving another stateless ship earlier in the week.

The captain of the Sea Owl I, a Russian citizen, is currently under investigation for the use of false documents and multiple violations of the Swedish Maritime Act. Senior prosecutor Adrien Combier-Hogg stated that while the investigation is active, no individuals had been formally detained as of Friday. This clarification follows conflicting reports from some German media outlets suggesting the captain had been arrested or taken into custody. The Swedish Coast Guard continues to inspect the vessel to determine its technical condition and the validity of its maritime certifications. Authorities are particularly concerned about the environmental risks posed by shadow fleet tankers, which often lack proper insurance. The investigation focuses on whether the ship's documentation was intentionally falsified to hide its connection to sanctioned Russian entities.

The interception of the Sea Owl I highlights the growing tension in the Baltic Sea regarding the transit of Russian oil. Swedish officials have expressed concern that these vessels pose a significant threat to maritime safety and the environment due to their age and lack of transparency. The Swedish Coast Guard has intensified its patrols to identify ships that do not comply with international maritime regulations. This latest boarding is seen as a signal to operators of the shadow fleet that Swedish waters will not be a safe haven for sanctioned transport. The government in Stockholm is working with Baltic neighbors to coordinate a response to the increasing number of stateless ships.

„No one has been formally detained yet, despite the investigation into the use of false documents and maritime law violations” — Adrien Combier-Hogg via Reuters

The Russian shadow fleet emerged as a major geopolitical issue following the 2022 invasion of Ukraine and the subsequent imposition of a G7-led price cap on Russian oil. Estimates suggest the fleet consists of hundreds of vessels, many of which are over 15 years old and operate under flags of convenience like those of Gabon or the Comoros. Sweden and other Baltic states have frequently warned that a maritime accident involving one of these uninsured tankers could lead to an ecological catastrophe in the sensitive Baltic Sea ecosystem. The European Union expanded its sanctions in late 2024 and 2025 to specifically target individual vessels identified as part of this clandestine network.

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