This is an in-depth analysis of Russia’s Shadowfleet by Kurt Engelen from Belgium’s Royal Higher Institute for Defense (RHID). For reference, see also this recent and shorter article by Euromaidenpess.
Here’s the report’s conclusion (via Le Chat Ai) : The shadow fleet is not marginal but central to Russia’s war economy. Stronger enforcement—at sea, financially, and diplomatically—is critical to cutting off Moscow’s oil revenues and weakening its military capacity.
For a summary see comments. Also I can’t edit the title thanks to the new bot.



Via Le Chat, Ai.
Summary: Russia’s Shadow Fleet – Sanctions Evasion at Sea Kurt Engelen, September 2025.
Context
Since Russia’s full-scale invasion of Ukraine in 2022, Western sanctions—especially the EU embargo and G7/EU/Australia price cap on Russian oil—have aimed to cripple Moscow’s war economy. However, Russia has circumvented these measures using a “shadow fleet”: a network of ageing, poorly maintained tankers with obscured ownership, operating outside international regulations.
Key Findings
1. Definition and Scale
2. Tactics
3. Third-Country Enablers
4. Legal and Enforcement Challenges
5. Enforcement Efforts
6. Effectiveness of Sanctions
Recommendations
Conclusion
The shadow fleet is not marginal but central to Russia’s war economy. Stronger enforcement—at sea, financially, and diplomatically—is critical to cutting off Moscow’s oil revenues and weakening its military capacity.
Source: Focus Paper 54, Centre for Security and Defence Studies (CSDS), September 2025