Dozens of oil tankers used by Russia have stopped sailing under the Liberian and Marshall Islands flags in recent weeks after the United States ramped up sanctions enforcement on ships linked to those registries, according to shipping data and interviews with industry and government officials.
The shift reflects the close relationship between the U.S. and the flag administration companies of Liberia and the Marshall Islands, which are headquartered not in their home countries, but in Virginia, just miles from Washington D.C. and within the jurisdiction of U.S. sanctions enforcement.
The heavy past use of those flags also represents a potentially lasting vulnerability for Russia’s oil fleet, whose tankers will remain liable for sanc