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Ukrainian sailors leave the Konstantin Olshansky navy ship in the bay of Donuzlav, Crimea, on March 24, 2014.
Russia's Konstantin Olshansky in the bay of Donuzlav, Crimea, in March 2014.
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A satellite image shared by the UK Ministry of Defence purports to show the silhouette of a submarine painted on a quay beside a real submarine.
An image taken in February and shared by the UK Ministry of Defence purports to show the silhouette of a submarine painted on a quay beside a real submarine.
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Russian navy
Russia's President Vladimir Putin (center) waves next to Russia's defense minister Sergei Shoigu (fourth left) and commander in chief of the Russian navy, Adm. Nikolai Yevmenov (right).
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A black and white image shows a large explosion on top of the sea
A still from footage released on Tuesday of an explosion on what Ukrainian military intelligence said was the Russian patrol ship Sergei Kotov off the coast of Crimea.
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A warship is seen docked in the port of the Black Sea resort city of Sochi during a storm on Nov. 27, 2023.
A Russian warship is seen docked in the port of the Black Sea resort city of Sochi during a storm on Nov. 27, 2023.
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Russian navy
A view shows the Russian Navy's vessels near the Black Sea port of Sevastopol, Crimea February 16, 2022.
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Ukraine says it sank a Russian naval ship in the Black Sea with cheap sea drones. The country reports it's the second Russian ship destroyed in a month — a much-needed win for Ukraine, which is low on ammunition, fresh troops, and ally aid.

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Two grainy black and white video stills appear to show a naval drone's eye view of the Russian Black Sea Fleet landing craft the Caesar, as well as a large explosion on the water, issued on February 14, 2024.
Still released by Defense Intelligence of Ukraine reportedly showing the destruction of the Caesar, a Russian landing craft, on February 14, 2024.
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Ukrainian forces during a nighttime raid in the Black Sea.
Ukrainian forces during a nighttime raid in the Black Sea.
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The Russian Navy's large landing ship Novocherkassk sails in the Bosphorus, on its way to the Mediterranean Sea, in Istanbul, Turkey, October 8, 2015.
The Russian landing ship Novocherkassk, seen here in 2015, was damaged in a Ukrainian airstrike, Russian officials confirmed.