Russian Kilo+ class submarine Rostov-on-Don passing Istanbul strait - 23/06/2020

?? Russian Navy Black Sea Fleet 4th Independent Submarine Brigade’s Project 06363 Improved Kilo class diesel-electric attack #submarine Rostov-on-Don B237 armed with 3M54K, 3M14K Kalibr-PL cruise missiles southbound through Istanbul today en route to Admiralty Shipyard in St. Petersburg while ??Black Sea Fleet’s 184th Novorossiysk Coastal Defense Brigade Patrol Ship Division’s Project 22160 corvette DMITRIY ROGACHEV 375 returning from Mediterranean entered Black Sea. (23/06/2020 15:00Z) Article 12 of the 1