Turkish submarines crossing the Bosphorus straits near Istanbul

So Turkish Navy Gür Class sub transited Bosphorus northbound and went towards Black sea.

Turkish Navy Gür Class sub on the Bosphorus. #Istanbul #DzKK pic.twitter.com/wzZZvAEAVd

— alper boler (@alperboler) December 12, 2015

Turkish Navy's type 209/1400 Preveze/Gür class submarine transited northbound Bosphorus. pic.twitter.com/T4msteJO1q

— Yörük Işık (@YorukIsik) December 12, 2015