.WHEN RUSSIA penetrated in February 2022 Ukraine rarely possessed a naval force. The defenders scuttled their one frigate to stop Russia from seizing it. Two years later Ukraine is straining to keep back a Russian offensive on land-- however it is succeeding the battle Ocean and has cracked the Russian clog of its own grain ships. Its triumphes have usually depended on swift technological development: every other navy relies upon crewed ships to eliminate, however Ukraine has created a fleet of drone boats, or uncrewed surface cars (USVs). How are they molding the war at sea?