ISTANBUL – The Russian Improved Kilo-class submarine Krasnodar (B-265) made an unexpected southbound passage through the Bosphorus Strait on Thursday. The submarine assigned to the Black Sea Fleet entered the Mediterranean the next day.
Under the Montreux Convention rules governing warships in the Black Sea, there are specific restrictions around passage in and out of the Black Sea, including by submarines.
While the submarines of non-Black Sea nations are forbidden to pass through the Straits, the submarines of Black Sea riparian states may pass through the Turkish Straits – but only if they are passing through for the purpose of joining a base in the Black Sea for the first time after their construction or purchase, or for the purpose of going to or from repairs in yards outside the Black Sea.
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