.WHEN RUSSIA invaded in February 2022 Ukraine scarcely possessed a naval force. The defenders scuttled their one frigate to avoid Russia from appropriating it. Two years later Ukraine is battling to hold off a Russian onslaught on land-- but it is gaining the war Sea and also has broken the Russian clog of its grain ships. Its success have usually relied on swift technical technology: every other naval force relies on crewed ships to fight, but Ukraine has actually constructed a squadron of drone watercrafts, or uncrewed surface area cars (USVs). Exactly how are they molding the battle mixed-up?