Law of the Sea comes to life in the hunt for sanctioned Russian oil

What the report says

Western countries backing Ukraine are increasingly using maritime law to inspect Russian “shadow fleet” tankers carrying sanctioned oil, according to Al Jazeera. The report says the shift has taken place in 2026, with the United States, United Kingdom, France and some European Union states leaning on Article 110 of the UN Convention on the Law of the Sea to board vessels that appear to be using false flags, fraudulent registries, disabled trackers or other evasion tactics.

The article says the practical aim is to raise the cost and difficulty of moving Russian crude to market, even if the inspections are formally justified on safety and compliance grounds. Al Jazeera notes that Russia has routed a large share of its oil exports through tankers outside Western insurance and ownership systems since the sanctions imposed after the 2022 invasion of Ukraine. The piece also describes how some registries previously used by these ships have been persuaded to remove them, pushing more vessels onto Russia’s own registry.

The report highlights the Baltic Sea as a particularly important chokepoint, where Denmark and Sweden have more room to enforce national laws as ships move toward the North Sea and Atlantic. It also says Denmark has stepped up inspections in 2025 and 2026. Experts quoted by Al Jazeera said the legal tools had existed for years but were only recently being used more actively.

The story matters because it shows sanctions enforcement moving beyond financial restrictions into direct maritime policing, with potential consequences for shipping, insurance, and Russia’s oil revenues.