The U.S. Navy continues to maintain the practically constant presence of its ships in the Black Sea waters, a source in the Russian Navy Staff told Interfax-AVN on Monday.
"U.S. Navy guided missile destroyer USS Donald Cook passed Black Sea Straits towards the Black Sea on Friday," he said.
Navy ships of the United States and other NATO member countries have been almost constantly present in the Black Sea since the beginning of the crisis in eastern Ukraine.
This is the second visit of USS Donald Cook to the Black Sea in 2014. The first visit was paid on April 10. A Russian Sukhoi Su-24 frontline bomber flew around the ship several times on April 12. The destroyer is armed with an Aegis air defense system and Harpoon anti-ship missiles.
The Montreux Convention limits the period of stay of ships from non-Black Sea countries in the Black Sea waters to 21 days.
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