.WHEN RUSSIA penetrated in February 2022 Ukraine scarcely had a naval force. The guardians scuttled their one frigate to stop Russia coming from seizing it. Two years later on Ukraine is having a hard time to hold back a Russian aggression on land-- but it is winning the battle in the Black Sea and has actually cracked the Russian clog of its own surface ships. Its own success have usually relied on rapid technological advancement: intermittent navy relies on crewed ships to fight, but Ukraine has created a line of drone boats, or uncrewed surface area vehicles (USVs). Exactly how are they shaping the battle at sea?