Context: After Russia withdrew its larger warships due to a series of devastating attacks, Ukraine's advancing drone boats seem to be targeting smaller, high-speed vessels in the Black Sea.
Black Sea
o Drains into the Mediterranean Sea via the Turkish Straits and the Aegean Sea.
o The Bosporus Strait connects it to the small Sea of Marmara which in turn is connected to the Aegean Sea via the Strait of the Dardanelles.
o To the north, the Black Sea is connected to the Sea of Azov by the Kerch Strait.
o A meromictic lake has layers of water that do not intermix.