European naval forces have boarded another sanctioned tanker linked to Russia’s so-called “shadow fleet,” marking the latest enforcement action as the European Union ramps up pressure on vessels suspected of operating under questionable flag registrations. Operation IRINI said the documentation and information collected during the inspection are now being examined. Last month, Operation IRINI boarded the sanctioned tanker South Star during another flag-verification mission after EU officials said there were grounds to question the vessel’s claimed nationality. Operation IRINI, originally established to enforce the United Nations arms embargo on Libya, received authority in March to conduct flag-verification boardings under Article 110 of UNCLOS. The mission carried out its first such inspection in May, and by late June had already boarded several suspected shadow fleet tankers.