Russia's naval military might dwarf that of Ukraine, yet the Black Sea Fleet (BSF) continues to be targeted – and increasingly effectively – by Ukrainian forces. Conventional military wisdom suggests the largest, best equipped military will prevail, yet Ukraine appears to have turned that principle on its head. Why is Ukraine attacking the Russian Navy, and does this strategy expose a critical vulnerability for many of the world's naval powers? Following Russia's illegal annexation of Crimea in 2014, Ukraine recognised its Sevastopol-based navy could not match Russia's BSF militarily, so those ships that could not escape – around 75% of…