France Targets Russia’s Stateless Tanker

For days, a French Navy warship followed the Tagor across the Atlantic before boarding it west of Brittany. The tanker had changed flags mid-voyage, moving from Madagascar to Cameroon. Neither registration was valid. Its Russian captain refused to follow orders (Maritime Executive). A British warship helped track the vessel overnight (NDTV).

The Tagor is now anchored in Douarnenez Bay, under criminal investigation for défaut de pavillon: sailing without a valid flag. France has seized shadow fleet tankers before, but this is the first case to move into criminal prosecution rather than an administrative fine (Euronews). President Macron called sanctions evasion "unacceptable" (DW). Paris is trying to turn interception at sea into a legal instrument.

One Country Moves While 27 Cannot Agree

France is using UNCLOS, the United Nations Convention on the Law of the Sea, the treaty that sets the basic rules for rights at sea. Article 110 allows warships to stop vessels on the high seas when they have no valid flag (Völkerrechtsblog). That gives France a route around the EU's familiar blockage: sanctions changes need unanimity, which means all 27 member states must agree.

The EU's 21st sanctions package, expected in early June, will add more shadow fleet tankers to the target list (Livemint). But the Full Maritime Service Ban, which would stop EU companies from insuring, crewing or servicing vessels carrying Russian oil, remains stuck. According to Euronews Greece, Greece and Malta say the ban can proceed only if the G7, the club of major Western economies, moves first. Cyprus took the same line during negotiations on the 20th package. Greek, Cypriot and Maltese companies make billions from maritime services linked to vessels carrying Russian cargo, which explains the resistance.

Poland is pushing in the opposite direction. Seven member states have demanded tougher restrictions on the shadow fleet (Newsmax Polska). Poland and Denmark have held joint exercises practising how to board suspected shadow fleet vessels (PolSOF). The sanctions fight is now split between countries prepared to act at sea and countries determined to limit what the EU can mandate.

The Baltic Standoff

Even the harder-line states face limits in their own waters. Estonia's foreign minister praised the French boarding as "the right signal" (ERR). But Estonia has also accepted that boarding vessels in the Baltic carries a different level of risk: Russian escort ships follow the tankers and deter enforcement at the moment of contact. Denmark controls the Danish Straits, the only chokepoints into the Baltic, and has carried out no boardings.

France can act in the open Atlantic because Russian naval escorts are absent there. In the Baltic, where shadow fleet traffic is thickest, proximity to Russian bases changes the calculation. Enforcement is happening where the risk is manageable, rather than where the need is greatest.

Russia is adjusting as well. It has been systematically moving shadow fleet vessels onto its own registry (Ukrainska Pravda). A vessel flying a valid Russian flag is no longer stateless, so it cannot be boarded under Article 110 of UNCLOS. If Moscow completes that re-registration effort, the legal route France used begins to close. Without authorisation from the UN Security Council, which Russia would veto, there is no obvious substitute.

The Tagor remains in a French bay, with its captain facing criminal charges. Ship by ship, Russia is closing the loophole that allowed France to board it.