.WHEN RUSSIA occupied in February 2022 Ukraine barely possessed a navy. The defenders scuttled their one frigate to avoid Russia from seizing it. Pair of years eventually Ukraine is struggling to keep back a Russian offensive on land-- however it is gaining the war in the Black Ocean and has actually cracked the Russian clog of its own grain ships. Its triumphes have usually depended on fast technical advancement: intermittent naval force counts on crewed ships to overcome, yet Ukraine has built a fleet of drone watercrafts, or uncrewed surface area cars (USVs). How are they forming the battle mixed-up?