Thousands of miles from the Gulf of Oman, near a group of islands called the Riau Archipelago, satellite imagery shows at least 13 tankers have offloaded Iranian oil in ship-to-ship transfers since the U.S. blockade began.
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Imogen Piper
Experts say covert transfers at sea are used to obscure the origins of oil that left Iranian ports and the Gulf of Oman before the blockade was imposed.
