A rotation of Russian ships has occurred in the Black Sea. Currently, one submarine is on duty, but the Russian army rarely deploys it, according to Dmytro Pletenchuk, spokesperson for the Ukrainian Navy. “Regarding the Black Sea, there has been a rotation. The submarine that was previously in the Black Sea has returned to its base in Novorossiysk, and it has been replaced by a similar submarine of the same 636 project, which is now on duty. So, there is currently one such submarine in the Black Sea,” Pletenchuk said. He noted that this submarine is more on combat duty rather than being active…