Russian submarine Rostov-na-Donu

Rostov-na-Donu (B-237) (Russian: Б-237 «Ростов-на-Дону») is a Project 636.3 (NATO reporting name Improved Kilo II–class) diesel-electric attack submarine of the Russian Navy. It was laid down on 21 November 2011, launched on 26 June 2014, and commissioned on 26 December 2014, becoming part of Russia's Black Sea Fleet.

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