More from the cited article ...

... Under international law, vessels flying a country's flag are under the protection of that nation but Dimitris Ampatzidis, senior risk and compliance analyst at maritime intelligence firm Kpler, told BBC Verify changing the ship's name and flag might not change much.

"US action is driven by the vessel's underlying identity [IMO number], ownership/control networks, and sanctions history, not by its painted markings or flag claim," he said.

Ampatzidis added that changing to the Russian registry might cause "diplomatic friction" but would not stop any US enforcement action.

"At present, our vessel is sailing in the international waters of the North Atlantic under the state flag of the Russian Federation and in full compliance with the norms of international maritime law," Russia's foreign ministry said. ...