Russian Oil Producers Stay One Step Ahead of Sanctions - WSJ

Oil is also being transferred between ships at sea, a page out of the playbook used to buy and sell sanctioned Iranian and Venezuelan oil. The transfers are happening in the Mediterranean, off the coast of West Africa and the Black Sea, with oil then heading toward China, India and Western Europe, according to shipping companies.

https://www.wsj.com/articles/russian-oil-producers-stay-one-step-ahead-of-sanctions-11654076614