A March 13 update added that around 30 tankers carrying at least 19 million barrels of Russian crude and 310,000 tons of refined products became potentially tradable after a temporary U.S. purchase waiver. The vessels were reported to be in Asian waters, with tracking signals showing them either on standby or heading toward Singapore and Malaysia. This expands on earlier reporting that the U.S. Treasury was temporarily allowing purchases of Russian oil stranded at sea to ease oil price pressure.