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They've had it for 7 years and they get to the Med just like all the other ships do, every day.
edit: " The Bosporus and Dardanelles Straits, together with the adjoining Marmara Sea, are known collectively as the Turkish Straits and provide the only access between the Black Sea and the Aegean Sea. More than 40,000 vessels passed through these waters in 2019, transporting almost 650 million tons of cargo, and reaffirming the Turkish Straits as one of the most important maritime trade corridors in the world. "
https://cimsec.org/let-me-get-this-strait-the-turkish-straits-question-revisited/
They do have a warm water port, Sevastopol. And their Black Sea Fleet has a squadron pretty much permanently in the Med.