Moscow Shields Its Shadow Fleet

The Sea of Azov is shallow, narrow, and now dangerous enough for Moscow to treat commercial shipping as a military asset. Ukraine launched maritime drones against Russian tankers this month, claiming strikes on more than 147 vessels in eleven days. Russia then suspended navigation through the Don-Azov Canal and the Kerch Strait (The Guardian, Kyiv Independent/Reuters).

The more revealing move came after that. Russia pulled drone operators and air-defence troops away from the frontline to guard the tankers (Euromaidan Press).

That redeployment says more than another sanctions statement from Brussels. Moscow now treats its sanctions-evasion fleet as infrastructure worth defending with combat units. Ukraine has turned the shadow fleet into a battlefield problem. Europe is still handling it mainly as a regulatory file.

The workaround that carries 54% of Russian oil

The shadow fleet is a loose network of ageing tankers with opaque ownership, frequent flag changes, manipulated tracking signals and non-Western insurance. Its job is to move Russian oil outside the EU and G7 price cap.

That cap does not ban Russian oil exports. It bars Western companies from providing shipping, insurance and related services for Russian crude sold above a set price. Once cargo moves onto vessels outside that service chain, Western leverage falls sharply. By June 2026, around 54% of Russia's seaborne fossil-fuel exports were moving on shadow tankers (CREA, The Insider).

Ukraine is now attacking that workaround directly. The campaign has targeted fuel routes to Crimea and southern occupied territory, hitting tankers, tugboats and cargo vessels (Times of India/Reuters). Russia struck Odesa, Chornomorsk and Izmail in the same period, linking the tanker campaign to Ukraine's grain-export corridor (BBC, gCaptain).

The effect should not be overstated. Market intelligence warns that the Sea of Azov is not Russia's main export artery. Many of the vessels hit appear to be smaller coastal craft, not the large crude carriers that bring in the serious revenue (Hamer). Russia is also adapting by rerouting through Novorossiysk and other Black Sea terminals (IndexBox).

Europe enforces unevenly

The EU listed 189 additional shadow-fleet vessels in its 17th sanctions package last year (Council). Yet sanctioned tankers still sailed through European waters while the 21st package was being negotiated (EUobserver). Listing a ship is not the same as stopping it.

The Netherlands wants the power to stop and detain stateless or falsely flagged vessels. The Dutch government has sent an urgent amendment to its foreign-ships law to the Council of State, the body that reviews legislation before parliament votes. The proposal would give authorities powers to inspect and hold ships at ports, locks and certification checkpoints (SWZ Maritime).

Dutch officials are also framing the risk beyond sanctions. They warn that shadow-fleet vessels could be used for espionage and sabotage against North Sea data and electricity cables (Rijksoverheid). The constraint is international maritime law. Innocent passage, the rule that lets properly flagged ships transit territorial waters without interference as long as they pose no threat, still applies at sea. Dutch enforcement works best at chokepoints, not in the open water between them.

Greece sits at the other end of the argument. Athens resisted restrictions on transporting Russian LNG to third countries during the 21st package negotiations (Euronews). Its case is that badly designed bans push cargo away from regulated European carriers and towards less transparent operators, without cutting Moscow's income (Cyprus Mail).

That argument matters for Malta too. As a maritime state with a large ship register and a services economy built around regulation, Malta knows the difference between oversight and paper control. If sanctions simply move business from insured Western ships to darker fleets, Russia keeps exporting while Europe loses visibility.

But the same argument also gives shipping states leverage inside the Council, where sanctions require unanimity, meaning one country can block the package. Greece and Cyprus, both major shipping states, can protect globally dominant fleets while presenting resistance as policy realism.

Who pays for what

The costs are not shared evenly. Ukraine spends drones and absorbs Russian retaliation strikes on its ports. Coastal states such as Romania sit next to an expanding maritime war zone. Shipping states protect revenue and argue they are preserving oversight. Russia reroutes.

The next decision sits with the EU Council: whether shipping states can keep shielding maritime business while Ukraine carries the military cost of enforcement that European regulation has not delivered.