.WHEN RUSSIA got into in February 2022 Ukraine rarely had a navy. The guardians scuttled their one frigate to stop Russia from seizing it. Two years later Ukraine is straining to hold back a Russian onslaught ashore-- but it is gaining the war in the Black Sea and also has damaged the Russian clog of its surface ships. Its own victories have commonly depended on rapid technical innovation: intermittent naval force depends on crewed ships to combat, but Ukraine has actually built a line of drone watercrafts, or even uncrewed surface area motor vehicles (USVs). How are they molding the war at sea?