(Bloomberg) — A second Russia-linked oil tanker lost control as it was entering the Mediterranean Sea in under a week. The medium-range vessel Chariot Tide first showed signs of difficulty as it approached Tangier, Morocco, on Jan. 21, when its speed abruptly dropped to less than two knots. By Wednesday, its operational status had shifted to “in casualty or repairing.”Last week, another tanker, the Progress, also showed as “not under command” while on a similar route. That two tankers hauling Russian oil have run into navigational difficulties in quick succession will give alarm critics, who argue that a fleet that Moscow assembled to beat western sanctions poses an environmental risk. Over the next two days, the Chariot Tide passed slowly through the Strait of Gibraltar into the Mediterranean Sea, stopping at various points along the way without entering a port.