Russia's Shadow Fleet: Tankers, War-Risk Insurance & P&I Clubs
To keep oil revenue flowing under Western sanctions, Russia assembled a sprawling "shadow fleet" of aging tankers that operate outside the normal system of insurance, ownership and pricing. Estimates of its size range from roughly 600 vessels at the core to well over a thousand in the broadest counts. The fleet's greatest vulnerability is insurance: the mainstream P&I clubs have largely walked away, leaving these ships dependent on opaque, weakly capitalized cover. This explainer sets out how the fleet works, why insurance is the pressure point, and how enforcement is escalating.
What the Shadow Fleet Is
The shadow fleet — also called the dark or ghost fleet — is the collection of tankers that carry Russian crude and refined products while staying outside the Western-led system of marine insurance, financing and the G7 oil price cap. The cap bars Western maritime services for Russian oil sold above a set ceiling, so the workaround is to avoid Western services entirely.
These ships tend to be old, with opaque ownership routed through shell companies, frequent changes of name and flag, and insurance from non-Western or sham providers. Crews conduct ship-to-ship transfers in open water and sometimes disable tracking transponders to obscure where cargo originates. The aim is to keep Russian oil revenue flowing while making the trade hard to police.
How Big Is It?
| Metric | Estimate (approx.) |
|---|---|
| Core shadow-fleet vessels | ~600–900 |
| Broadest tanker counts (grey/sanctioned trade) | ~1,200–1,600 |
| Crude from Baltic ports on IG-insured ships (Nov) | ~56% (so ~44% outside IG cover) |
| Russian P&I disclosed coverage | ~220 tankers |
| Fleet trend through 2025 | still growing, but more slowly |
⚠ Estimates vary by definition and date and should be treated as approximate (Insurance Journal; KSE insurance report). Not investment advice.
P&I Clubs and War-Risk Cover
Protection and Indemnity (P&I) clubs are mutual insurers that cover shipowners against third-party liabilities — oil-spill cleanup, wreck removal, collision damage, crew injury. The International Group of P&I Clubs traditionally insures around 90% of the world's oceangoing tonnage, and its cover is what coastal states rely on to guarantee a payout if a tanker causes catastrophic damage.
Because the International Group clubs have largely exited Russian-linked trade, shadow-fleet vessels must turn to second- and third-tier insurance. War-risk insurance — which covers seizure, detention and war perils that ordinary policies exclude — has become especially relevant as enforcement turned physical, with underwriters pricing the risk of boardings and seizures far more aggressively for ships in grey trades.
Insurance: The Weak Link
Insurance is the shadow fleet's structural vulnerability. A laden tanker can cause a spill costing billions to clean up, so the credibility of its liability cover matters enormously. Many shadow-fleet ships rely on insurers that are minimally capitalized, legally dubious, or operating without recognized reinsurance — meaning a serious casualty could leave a coastal state with no real payout.
Moscow set up domestic P&I coverage through firms such as Ingosstrakh, Sogaz and AlfaStrakhovanie, backstopped by the Russian National Reinsurance Company. But Russian providers have disclosed coverage for only around 220 tankers, and several of these insurers — including AlfaStrakhovanie and Ingosstrakh — have since been sanctioned by the EU, US and UK. That thinness of credible cover is exactly the lever Western states are pulling, tying port access and safe passage to verifiable insurance.
Enforcement Turns Physical
Through 2025, sanctions enforcement moved from paperwork to the water. Baltic and North Atlantic states began boarding and in some cases seizing vessels linked to the shadow trade, and the EU's sanctions packages tied port access to verifiable insurance while seeking to block reinsurance through EU entities. The pressure raised costs and operational risk for the fleet even where outright seizures were rare.
The crackdown carries escalation risk. Russia signalled it might provide naval escorts for shadow-fleet tankers, raising the prospect of confrontation in crowded chokepoints such as the Danish straits. The fleet thus sits at the intersection of sanctions policy, maritime safety and a hardening security standoff in European waters.
The Tracking and Cyber Angle
The shadow fleet is not only a financial and insurance story; it is also a tracking-deception and cyber problem. Vessels spoof or switch off their AIS transponders, broadcast false positions, and route ownership through layered shell companies to break the audit trail between cargo and origin. These tactics overlap directly with maritime cyber and information-deception techniques.
In response, investigators increasingly combine satellite imagery, radio-frequency and signals analysis to catch ships that "go dark," reconstruct their voyages, and tie them back to sanctioned cargo. The cat-and-mouse over tracking data is becoming as important as the legal and insurance fight, and it links the shadow-fleet story to broader work on sanctions evasion and digital deception in the war economy.
Frequently Asked Questions
What is Russia's shadow fleet?
The shadow fleet — also called the dark or ghost fleet — is a large group of aging tankers that move Russian crude and products outside the Western-led system of insurance, ownership and pricing rules. They use opaque ownership, frequent flag and name changes, and non-Western insurance to evade the G7 oil price cap and keep Russian oil revenue flowing.
How many ships are in the shadow fleet?
Estimates vary widely by definition. Many analysts put the core at roughly 600 to 900 vessels, while broader industry counts of all tankers linked to sanctioned or grey trade run as high as 1,200 to 1,600. The fleet continued to grow through 2025 despite expanding Western sanctions, though its growth slowed.
What are P&I clubs and why do they matter?
Protection and Indemnity (P&I) clubs are mutual insurers that cover shipowners for third-party liabilities such as oil-spill cleanup, collision and injury. The International Group of P&I Clubs traditionally insures around 90% of the world's oceangoing tonnage. Because they have largely exited Russian-linked trade, the shadow fleet must rely on weaker, often minimally capitalized alternative insurers.
What is war-risk insurance?
War-risk insurance covers losses from war, seizure, detention and similar perils that standard hull and cargo policies exclude. As enforcement against the shadow fleet turned physical — with boardings and seizures in the Baltic and beyond — war-risk underwriters began pricing those risks far more aggressively, raising costs for vessels in grey trades.
How does the shadow fleet evade the oil price cap?
The G7 price cap bars Western maritime services for Russian oil sold above a set price. The shadow fleet sidesteps it by avoiding Western insurance, financing and shipowners entirely — using older ships, non-Western or sham insurance, ship-to-ship transfers and disabled tracking transponders so the cargo never touches the regulated system.
Who insures the shadow fleet?
After the International Group clubs withdrew, Russia leaned on domestic insurers such as Ingosstrakh, Sogaz and AlfaStrakhovanie, backstopped by the Russian National Reinsurance Company, plus assorted small, opaque providers in jurisdictions with weak oversight. Several of these, including AlfaStrakhovanie and Ingosstrakh, have since been sanctioned by the EU, US and UK.
Why is insurance the fleet's weak link?
A modern tanker faces catastrophic potential liabilities — a major oil spill can cost billions. If a shadow-fleet vessel's insurance is sham or minimally capitalized, a casualty could leave a coastal state with no real payout, and that exposure gives regulators leverage to demand verifiable cover as a condition of port access and safe passage.
How are Western states cracking down in 2025?
Enforcement turned physical in late 2025, with Baltic and North Atlantic states boarding and in some cases seizing vessels, while the EU tied port access to verifiable insurance and moved to block reinsurance through EU entities. Russia responded by signalling it might provide naval escorts, raising the risk of confrontation at sea.
Is the shadow fleet a cyber and tracking problem too?
Yes. Shadow-fleet tactics include spoofing or disabling AIS transponders, faking location data and obscuring ownership through shell companies, which overlaps with maritime cyber and tracking-deception techniques. Investigators increasingly use satellite and signals analysis to expose vessels that go dark to hide sanctioned cargo.
Where can I read more on the shadow fleet?
Detailed analysis is published by the Kyiv School of Economics (KSE), CEPA, Reuters, the Insurance Journal and reinsurance trade press, and by EU institutions. Figures on fleet size and insurance coverage vary by definition and date, so treat specific counts as approximate. This page is an explainer, not financial or legal advice.