.WHEN RUSSIA occupied in February 2022 Ukraine scarcely possessed a naval force. The defenders scuttled their one frigate to prevent Russia coming from seizing it. 2 years later Ukraine is actually struggling to keep back a Russian offensive ashore-- yet it is gaining the war in the Black Ocean as well as has actually cracked the Russian blockade of its own surface ships. Its success have actually usually depended on rapid technical advancement: every other naval force relies upon crewed ships to combat, however Ukraine has actually developed a line of drone watercrafts, or uncrewed surface automobiles (USVs). Just how are they molding the battle mixed-up?