South Korean President Lee Jae Myung welcomed the PanStar Acro and its crew home on Tuesday after the container ship completed the country’s first round-trip commercial trial through the Arctic to Europe, hailing the voyage as a potential alternative to traditional shipping lanes even as questions remain over commercial viability and cooperation with Russia.

A 22-year-old product tanker sanctioned by the European Union is making an unusual late-season voyage along Russia's Northern Sea Route, highlighting the growing use of older, lower-specification vessels to move petroleum products through the Arctic.