Russian Navy Submarine Transits Bosphorus Strait En Route To Black Sea

ISTANBUL, TURKEY - FEBRUARY 13: The Russian Navy’s Kilo-class submarine Rostov-na-Donu B-237 transits the Bosphorus Strait en route to the Black Sea on February 13, 2022 in Istanbul, Turkey. Russia has been reinforcing its Black Sea Fleet over the past week as a Russian military invasion of Ukraine being reported as imminent. With the arrival of the Rostov-na-Donu, the Russian Black Sea Fleet will have four improved Kilo-class submarines equipped with Kalibr land-attack missiles deployed in the Black Sea. (Photo by Burak Kara/Getty Images)