Is China’s Oil Shipping Fleet Going Dark? Tankers Are Turning Off Transponders

China’s tanker owning company Cosco Dalian, which was sanctioned by the U.S. two weeks ago for knowingly shipping Iranian oil, has seen one third of its oil tankers turn off their automatic identification system (AIS) transponders in the past week, Reuters reported on Wednesday, citing ship tracking data from Refinitiv Eikon. Two weeks ago, the U.S. imposed sanctions on several Chinese tanker owners for shipping Iranian oil, including units of Cosco, who owns more than 40 oil tankers, including 26 supertankers, or the so called very large…