"On 17 June 2022, Ukrainian forces claimed their first successful use of Western-donated Harpoon anti-ship missiles to engage Russian maritime forces," the UK Ministry of Defence wrote on Twitter.
"The target of the attack was almost certainly the Russian naval tug Spasatel Vasily Bekh, which was delivering weapons and personnel to Snake Island in the north-western Black Sea. The destruction of the Russian vessel on a resupply mission demonstrates the difficulty Russia faces when attempting to support their forces occupying Snake Island. Ukrainian coastal defence capability has largely neutralised Russia's ability to establish sea control and project maritime force in the north-western Black Sea. This has undermined the viability of Russia's original operational design for the invasion, which involved holding the Odesa region at risk from the sea," the Ministry tweeted.