The seizure of the oil tanker Sea Owl near the port of Trelleborg on March 12 marks the second incident involving “shadow fleet” vessels in a single week. Sweden’s Minister for Civil Defence, Carl-Oskar Bohlin, reported that the 228-meter vessel, bound for the Russian port of Primorsk, allegedly lacks legitimate state affiliation. The Swedish Coast Guard has initiated an investigation into the tanker, which is already included in EU sanction lists for transporting Russian energy resources in defiance of restrictions.
Technical violations and environmental risks
The investigation established that the Sea Owl was operating under a fraudulent Comoros flag, a fact supported by data from Starboard Maritime Intelligence and The Insider. Such practices of concealing jurisdiction are a key characteristic of the fleet servicing Russian raw material exports. Swedish authorities state there are serious threats to maritime safety and risks of an environmental catastrophe in the Baltic Sea due to the poor technical condition of the vessel, which previously operated on a route from Santos, Brazil.
Analytical conclusions and consequences
This incident confirms that Baltic region countries are moving toward active physical opposition to logistical schemes used to bypass sanctions. The increased oversight by the Swedish Coast Guard, which also affected the bulk carrier Caffa, sets a precedent for blocking key oil export routes through the Baltic. In 2026, this could lead to rising operational costs for Russian exporters and the need to seek even riskier transportation routes, increasing the strain on the system’s resources.