Russian oil tankers are increasingly avoiding the English Channel, opting for longer North Atlantic routes after increased interceptions by British and French naval forces. Ship tracking data reveals sanctioned vessels are rerouting to bypass European waters, adding significant time and fuel costs to their journeys. This shift follows a crackdown where Cameroon removed 39 sanctioned vessels from its flag registry, enabling European navies to intercept them.

This strategy change stems from intensified enforcement against Russia's shadow fleet, which Moscow built to circumvent sanctions on its oil exports. European countries, including Ireland and Belgium, are legislating to empower their forces to board vessels suspected of operating without proper flagging. Such actions directly challenge Russia's ability to move its oil to market, impacting global energy flows.

The diversions mean extra sailing days for each ship, increasing operational expenses. With bunker fuel accounting for a substantial portion of voyage costs, these extended routes represent a tangible financial burden. The UK and France have already seized several vessels previously flagged by Cameroon, signaling a growing risk for the shadow fleet.

The UK seized the Smyrtos on June 14, and France intercepted the Deliver off Sicily on June 23, illustrating the increased enforcement. These interceptions highlight a growing pressure point on Russia's oil export strategy, forcing costly and time-consuming detours.