.WHEN RUSSIA invaded in February 2022 Ukraine hardly had a naval force. The defenders scuttled their one frigate to avoid Russia coming from seizing it. 2 years later Ukraine is struggling to hold back a Russian aggression ashore-- yet it is gaining the battle in the Black Ocean and has actually cracked the Russian blockade of its surface ships. Its own victories have commonly depended upon rapid technical advancement: intermittent naval force counts on crewed ships to eliminate, however Ukraine has actually constructed a line of drone boats, or uncrewed area vehicles (USVs). Exactly how are they shaping the war mixed-up?