Tankers from nine European countries and the US have visited Russian ports in 2023 — a sign of the continuing importance of G7 and European Union shipowners for the trade in sanctioned oil, according to research.

The analysis identifies more than 150 tankers that have made port calls to Russia this year with owners from at least 17 countries.

They include more than 60 tankers under Greek ownership, S&P Global Market Intelligence said.