On the Ukrainian side, the exercise was attended by a former US ship transferred to Kyiv as part of efforts to strengthen its Navy.
The USS Roosevelt conducted joint exercises with the Ukrainian military in the Black Sea, the US Navy said.
The exercise involved the Ukrainian island-class boat Starobilsk and the small armored artillery boats Nikopol and Kostopol, the Navy said in a press release.
Starobilsk is a former US Coast Guard cutter that was transferred to Ukraine last year to strengthen the Ukrainian Navy.
The MH-60R Seahawk helicopter assigned to the Roosevelt and the Ukrainian Mi-14 helicopter also joined the exercises in the Black Sea, the press release said.
“Conducting exercises with our Ukrainian partners in NATO demonstrates the combined strength and potential that is always present when the naval forces of our two countries are united. The partnership between the United States and Ukraine, which has existed for several decades, has never been stronger,” said the commander of the Roosevelt, Ryan Kendall.
“The Ukrainian Navy is a professional organization with great potential and skills, which required my team to work at the limit of our professional skills. It was a real pleasure to work with their naval team in the Black Sea,” he continued.