.WHEN RUSSIA invaded in February 2022 Ukraine hardly had a naval force. The guardians scuttled their one frigate to stop Russia coming from appropriating it. 2 years later on Ukraine is struggling to keep back a Russian offensive ashore-- but it is actually succeeding the battle in the Black Sea as well as has cracked the Russian clog of its own grain ships. Its own success have commonly depended on fast technical advancement: every other navy counts on crewed ships to eliminate, yet Ukraine has developed a squadron of drone watercrafts, or even uncrewed surface motor vehicles (USVs). How are they forming the war at sea?