.WHEN RUSSIA attacked in February 2022 Ukraine barely possessed a naval force. The defenders scuttled their one frigate to avoid Russia from appropriating it. 2 years later Ukraine is struggling to hold off a Russian onslaught on land-- yet it is winning the war in the Black Sea as well as has damaged the Russian blockade of its grain ships. Its own triumphes have actually frequently depended upon fast technical innovation: every other navy relies upon crewed ships to fight, but Ukraine has actually created a squadron of drone watercrafts, or uncrewed surface area cars (USVs). Just how are they molding the battle mixed-up?