The Russian Foreign Ministry has accused the US of taking provocative action in the Black Sea with the arrival of the USS Porter, a guided missile destroyer which arrived in the area a few days ago, outfitting with a new missile system.

The Foreign Ministry said the Porter’s arrival would lead to a “response” from the Russian Navy, but did not indicate what that would be. They also complained that the planned deployment of two US aircraft carriers in the Mediterranean in July was a “show of force” aimed at threatening Russia.

The US Navy claimed the ship entered the Black Sea to “promote peace” with its shiny new offensive missile system, which the Navy had described as being installed due to the “Russian threat.” The Porter is the first US ship to enter the Black Sea in 2016.

It’s not staying at any rate. The Montreux Convention limits non-Black Sea states to an extremely limited naval presence in the sea at any given time, and they are allowed to stay no more than 21 days at a given time.

Even then, the ship poses little practical threat to Russia,which has a significant Black Sea Fleet at Sevastopol, and the US has just the one, relatively small ship in the sea.