Shadow Fleet of 1,400 Aging Tankers Moves Sanctioned Oil Without Insurance

Since 2022, a 'shadow fleet' of approximately 1,100 to 1,400 oil tankers has emerged to transport crude oil from sanctioned nations, primarily Russia, Iran, and Venezuela, outside the reach of Western insurance, classification societies, and safety inspections. These vessels are old: the average shadow fleet tanker is 18.1 years old, compared to 10.4 years for mainstream commercial vessels, and over 75 percent have passed the 15-year threshold where technical failure rates increase sharply. Two-thirds carry insurance from unknown or unrated providers, meaning that if they spill oil or cause a collision, there may be no financially solvent insurer to pay cleanup costs. The environmental risk these vessels pose is enormous and largely unmonitored. Between 2022 and 2024, shadow fleet vessels were involved in dozens of incidents at sea, including oil spills, engine failures, and collisions. These tankers transit some of the world's most ecologically sensitive waterways, including the Baltic Sea, the Turkish Straits, the Strait of Malacca, and the Red Sea. A major spill from an uninsured shadow tanker could leave the affected coastal nation bearing the entire cleanup cost, potentially hundreds of millions of dollars, with no recourse against a shell company registered in a flag-of-convenience state. The problem persists because the shadow fleet serves a function that powerful actors want preserved. Sanctioned oil producers need these ships to maintain export revenue. Buyers in India, China, and Turkey get discounted crude. Ship owners and operators earn premium freight rates for the risk. Flag states like Gabon, Cameroon, and Palau collect registration fees without conducting meaningful inspections. Western sanctions created the incentive for the fleet to form, but enforcement is fragmented across dozens of jurisdictions. By mid-2025, the EU had blacklisted over 342 tankers and the UK had designated 133, but the fleet continually regenerates by purchasing aging tankers that mainstream owners are discarding and re-flagging them.