🇷🇺 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 1936 Montreux convention allows Black Sea countries' submarines to pass through Turkish Straits only for the purpose of joining their base in Black Sea after construction outside of Black Sea, or for repairs in dockyards outside the Black Sea, however before reaching St. Petersburg, the Rostov-on-Don will likely stay in Med & fire Kalibr to targets in Syria or Libya:
https://twitter.com/YorukIsik/status/...
https://www.forbes.com/sites/hisutton...

2 hours after Kilo+ class Rostov-on-Don's southbound passage,🇷🇺Russian Navy Black Sea Fleet Project 775/III Ropucha-II class Large Landing Ship AZOV 151 also passed through Istanbul en route to Mediterranean, with destination Tartous (17:00Z).