.WHEN RUSSIA attacked in February 2022 Ukraine hardly possessed a naval force. The defenders scuttled their one frigate to avoid Russia from seizing it. Pair of years later Ukraine is struggling to hold back a Russian onslaught ashore-- yet it is winning the war Ocean as well as has broken the Russian clog of its own grain ships. Its triumphes have actually commonly relied on swift technical innovation: every other navy counts on crewed ships to fight, but Ukraine has actually developed a line of drone watercrafts, or even uncrewed area vehicles (USVs). Just how are they forming the battle at sea?