Meanwhile, Russian officials claim the ships are tasked with the protection of drilling platforms seized from Ukraine’s Chornomornaftgaz along with the Crimea occupation.
Russia's War Against Ukraine
UNIAN: Ukraine suggests real reason behind Russian navy maneuvers in Black Sea

Russia's navy ships and helicopters take part in a military exercise called Kavkaz (the Caucasus) 2016 at the coast of the Black Sea in Crimea on Sept. 9, 2016.