.WHEN RUSSIA invaded in February 2022 Ukraine rarely had a navy. The guardians scuttled their one frigate to avoid Russia from appropriating it. Two years later Ukraine is actually struggling to hold off a Russian onslaught ashore-- but it is gaining the battle Sea and also has cracked the Russian clog of its surface ships. Its success have often depended upon swift technical advancement: intermittent naval force counts on crewed ships to eliminate, yet Ukraine has created a fleet of drone boats, or even uncrewed surface vehicles (USVs). Just how are they shaping the battle mixed-up?