The series highlighting the world's most expensive active vessels from online ship intelligence and information service VesselsValue.com focuses this week on the most expensive tanker vessel, which is not a VLCC but a Jones Act aframax. The first-in-class double hull tanker Liberty Bay is an 820-foot, 115,000 dwt aframax tanker built this year by Aker Philadelphia and owned by Seariver Maritime. The tanker, which has an 800,000-barrel capacity and supplies crude oil from Alaska North Slope to refineries along the U.S. west coast, prices in at approximately $184.7 million.