Tankers that had been scheduled to install emissions-cutting equipment ahead of stricter pollution standards starting in 2020 have deferred their visits to the dry docks to capitalize on an unexpected surge in freight rates, three trade sources said.  U.S. sanctions on subsidiaries of vast Chinese shipping fleet Cosco in September sparked a surge in global oil shipping rates as traders scrambled to find non-blacklisted vessels to get their oil to market. The rates for chartering a supertanker from the U.S. Gulf Coast to Singapore hit record highs of more than $17 million and a record $22 million to China earlier this week. By comparison, prior to the sanctions, shipping crude from the U.S. Gulf to China cost around $6 million-$8 million. (GRAPHIC: Global oil shipping rates surge […]