Russia’s invasion of Ukraine has reshaped Europe’s geopolitical landscape, but its consequences extend far beyond the battlefield. At sea, Moscow is circumventing international sanctions through the use of aging, uninsured, and flagless vessels that pose serious environmental and maritime security risks. These “shadow fleets” transport Russian oil to European ports despite embargoes, creating a ticking ecological time bomb.
The Ecological Danger and Sanctions Evasion
Aging Ships: A Ticking Environmental Time Bomb
The vessels Russia uses to bypass sanctions are often over 20 years old—well beyond their intended lifespan. Their deteriorating condition significantly increases the risk of accidents, oil spills, and catastrophic marine pollution. In January 2025, the Russian cargo ship Eventin, a vessel over 30 years old, drifted uncontrollably in the Baltic Sea after a mechanical failure. While the incident did not result in an environmental disaster, it exposed the vulnerability of European waters to these “rust buckets.”
Even more alarming, many of these ships lack proper insurance, meaning that in the event of an oil spill, the financial burden of cleanup would fall on coastal states. The Baltic, Mediterranean, and English Channel—all ecologically sensitive regions—could suffer irreversible damage.
The Uninsured Ship Crisis: A Systemic Risk
One of the most concerning aspects of these shadow fleets is their lack of insurance coverage. Most of these aging vessels are excluded from standard maritime insurance policies, creating a dangerous loophole that allows Russian operators to evade sanctions.
Maritime insurers, organized under the International Group of P&I Clubs, enforce strict underwriting criteria. Ships registered under high-risk flags (such as Syria or Sierra Leone) or failing safety standards (like SOLAS compliance) are automatically denied coverage. Yet, Russia deliberately exploits these flags of convenience to bypass restrictions.
If a disaster were to occur—such as a major oil spill or collision—the financial liability could reach hundreds of millions of euros. According to the European Maritime Safety Agency (EMSA), coastal nations would be forced to bear these costs, as there would be no insurance to fall back on. The Baltic Sea, already under threat from oil leaks, could face irreversible ecological damage.
The Eventin incident in January 2025 highlighted this risk. The drifting vessel had no insurance coverage, meaning Germany would have been responsible for any salvage or cleanup operations had the ship sunk. This case underscores the systemic danger posed by these uninsured “ghost ships.”
To mitigate this risk, the EU could mandate financial guarantees for all vessels entering its waters. Mechanisms like the International Oil Pollution Compensation Fund (which covers oil spills) could be expanded to include uninsured ships. Additionally, closer collaboration between insurers and customs authorities could help identify and track these vessels more effectively.
A Geopolitical Strategy: Bypassing Sanctions at Sea
Russia relies on these shadow fleets to export oil despite international sanctions. According to Windward, a maritime intelligence firm, over 10 million tons of Russian oil were transported in 2024 using these vessels. To evade detection, Moscow employs several tactics: flags of convenience, disabled Automatic Identification Systems (AIS), and shell companies to obscure ownership.
These maneuvers allow Russia to fund its war in Ukraine while endangering marine ecosystems.
European Port Access: A Sanctions Loophole
Despite embargoes, some shadow fleet vessels still manage to dock in European ports, a glaring weakness in maritime enforcement.
Recent Violations: A Pattern of Evasion
In January 2025, the Eventin docked in Sassnitz, Germany, after suffering a mechanical failure. German authorities eventually seized the vessel, but the incident proved that these ships can still penetrate European harbors. In December 2024, the Eagle S anchored in Porkkalanniemi, Finland, after a suspected act of sabotage. Meanwhile, in April 2025, a flagless vessel was detained in Tallinn, Estonia, following an unexpected inspection.
Greece: A Key Player in the Shadow Fleet System
Greece, one of the world’s largest maritime nations, plays a contradictory role in the shadow fleet network. While officially condemning Russia’s invasion of Ukraine, several Greek-registered vessels have been caught transporting sanctioned Russian oil. The Pegasus, a Greek-owned ship flying the Libyan flag, a notorious flag of convenience, was caught in 2024 transferring Russian oil in the Black Sea. Investigations by Reuters revealed that the cargo originated from Russian terminals under EU sanctions.
The Greek connection extends beyond individual ships. A Financial Times investigation uncovered a network of shell companies registered in Cyprus, a tax haven with strong ties to Greece, that obscure the true ownership of vessels involved in sanctioned oil trades. Even the Port of Piraeus, Greece’s busiest harbor, has faced allegations of serving as a discreet transit point for shadow fleet operations.
Greece’s economic reliance on shipping makes it particularly vulnerable to pressure from Russian oil traders. The country’s flag registry, along with those of Cyprus and Liberia, remains among the least regulated in the world, making them prime targets for sanctions evasion. While Greek authorities have pledged to tighten inspections, enforcement remains inconsistent, leaving loopholes that Russia continues to exploit.
Why Europe Struggles to Identify These Ships
Several obstacles hinder effective monitoring. A lack of coordination among EU member states complicates enforcement. Gaps in maritime tracking systems allow vessels to slip through undetected. Additionally, proving the origin of transported oil remains a major challenge, weakening the impact of sanctions.
However, some nations are stepping up inspections. The UK now checks 40 ships per month in the English Channel and Baltic Sea, leading to several seizures.
Can Europe Respond More Firmly?
To address these challenges, the EU could tighten sanctions against flags of convenience. Deploying drones and satellites for maritime surveillance could also enhance monitoring. Most importantly, harmonizing inspection procedures across all European ports would be a critical step forward.
Russia is betting on the opacity and decay of its shadow fleet to evade sanctions. But Europe still has time to act, before an ecological disaster strikes.
