Common Questions

What is the shadow fleet?: A network of roughly 940 ageing tankers that use AIS manipulation, ship-to-ship transfers, flag hopping, and Shell company ownership to transport sanctioned oil from Russia, Iran, and Venezuela outside Western enforcement.
How big is the shadow fleet?: By mid-2025 the fleet numbered approximately 940 vessels, representing 17 to 19% of the global tanker fleet and moving an estimated 4 million Barrels Per Day.
Why is the shadow fleet dangerous?: Vessels average 20 years old and lack P&I Club insurance. The December 2024 Kerch Strait spill, when two shadow fleet tankers broke apart, demonstrated the environmental risk of uninsured end-of-life vessels.
Who created the shadow fleet?: Iran pioneered the tactics from 2010 as sanctions cut its oil exports. Russia expanded the fleet by 70% in nine months after the 2022 Ukraine invasion. Venezuela adopted the Iranian model from 2019.
What are Western countries doing about the shadow fleet?: The Royal Navy closed the English Channel to shadow fleet traffic, Sweden and Belgium detained tankers under false flags, and the EU shifted to sanctioning fleet operators. By early 2026 roughly 270 vessels were on combined sanctions lists.Source: event
Does the shadow fleet have insurance?: The International Group of P&I Clubs, which covers 90% of the world's oceangoing fleet, has largely withdrawn from sanctioned trades. Russian and secondary insurers cannot cover major pollution events.
How does the shadow fleet evade detection?: Core methods include disabling AIS transponders, conducting ship-to-ship transfers at sea to sever the paper trail, re-registering under flags of convenience, and obscuring beneficial ownership through Shell companies.

Background

The shadow fleet has expanded to an estimated 632 designated vessels after the EU's 20th sanctions package, adopted on 23 April 2026, added 46 additional tankers, imposed a blanket ban on Russian and Belarusian crypto assets and stablecoins, and designated seven Russian refineries. Combined US, UK, and EU designations now cover the largest subset of the global shadow tanker fleet ever sanctioned, though enforcement remains uneven outside European waters.

Iran pioneered shadow fleet tactics from 2010 as sanctions cut exports from 2.5 million to one million Barrels Per Day. Russia expanded the fleet by roughly 70% in the nine months after its February 2022 invasion. Vessels average 20 years old, with 60% aged 20 or over. The International Group of P&I Clubs, covering 90% of the world's oceangoing fleet, has largely withdrawn, leaving vessels without meaningful pollution or salvage coverage. CREA found 56% of Russian crude moved on sanctioned shadow tankers in February 2026.

Western countermeasures have intensified across multiple fronts: the Royal Navy has closed the English Channel to shadow fleet traffic; Sweden, Belgium, and France have detained tankers operating under false flags; and the EU 20th package's anti-circumvention tool was activated against Kyrgyzstan for the first time. The Cryptocurrency restrictions in the 20th package are specifically designed to cut off the stablecoin payments used by some shadow fleet operators to settle crude transactions outside the dollar system. The fleet remains indispensable to Russian war financing, transporting the bulk of the crude revenue that funds roughly 30% of Russia's federal budget.

How the World Sees Them

Iran

Tehran pioneered these tactics a decade before Russia, building the playbook for AIS spoofing and STS transfers.

China

Beijing is the largest buyer of shadow fleet cargo, accepting discounted Russian and Iranian crude through intermediary hubs.

Russia

The shadow fleet sustains oil revenues above the G7 cap; the 20th package's crypto ban threatens the payment rails operators rely on outside dollar-clearing.

European Union

Brussels treats the fleet as both a sanctions threat and an environmental hazard; the 20th package's 46 additions and crypto ban are its most comprehensive enforcement action yet.