"This is a normal deployment ... demonstrating our commitment to freedom of navigation and our commitment to NATO allies and partners on the Black Sea," said 6th Fleet Commander Vice Admiral Lisa Franquette.
A squadron of the Arleigh Burke-class USS Porter has arrived in the Black Sea for the second time in a few months. This is the seventh warship the United States has sent to the region this year, as a response to Russia's aggressive actions against Ukraine.
Several Russian warships - Admiral Essen frigate, small cruise missiles Vyshny Volochek and Orekhovo-Zuevo are monitoring American ship's route, Interfax reports.
The Navy and NATO have increased their naval presence in the Black Sea after Russia invaded Crimea and annexed it from Ukraine in 2014.
Almost all countries that are bordering the Black Sea considered US allies or partner countries, but Russia retains territorial relevance to the sea partly because the former Soviet Union controlled most of these countries during the Cold War.