By Jonathan Saul and Timothy Gardner
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…
