The Ministry of Defence has concluded that the sinking of a Russian naval vessel earlier this month will have an impact on the country's 'command and control' operations.
The Taratul-III class missile ship the Ivanovets, built at an estimated cost of £55m, was swarmed by drones operated by Ukraine with direct hits sending the vessel down.
Footage issued by the Ukrainian military claims to show the boat listing to the side before sinking on February 1.
The Russian missile boat from the Black Sea Fleet was on a special operation off Russian-occupied Crimea.
Russian military blogger "Voenkor Kotenok" wrote on Telegram that the boat had sunk after being hit three times by naval drones.
Meanwhile in its latest update the The MoD said that the sinking would be a blow to the command and control functions of the Russian military in its ongoing invasion of Ukraine.
The ship was a small missile corvette which had high-tech equipment to help in the targeting of strikes.
The MoD wrote on X: "This latest Ukrainian success highlights the continuing vulnerability of Russian warships operating in the Black Sea.
"It will highly likely have an impact on the Black Sea fleet's command and control elements, probably forcing them to re-evaulate their manoeuvrability near western Crimea.
"However, the Russian Navy is almost certainly still able to conduct its three main tasks in the Black Sea: long-range strike, patrol and support."
After the strike on the Ivanovets Ukraine Foreign Ministry official Olexander Scherba described the attack as "impressive".
"At 03:45 [01:45 GMT] there was the first hit and at 04:00 the whole crew was evacuated already. So there was no chance at all that this vessel would be saved," he told the BBC.
Ukraine has launched a string of successful attacks around the Black Sea.
The country said it had destroyed the landing ship Novocherkassk at Feodosia, Crimea.
Russia confirmed that the ship had been damaged.
A couple of moth's after Russia's invasion in 2022 the Moskva, the flagship of Russia's Black Sea Fleet, was sunk.
Following that a missile strike hit the headquarters of the Black Sea fleet in Sevastopol last September.
Satellite images showed that the Russian navy had moved the bulk of its Black Sea fleet away from Crimea to the Russian Black Sea port of Novorossiysk.
