Presented to the attention of lovers of the history of the fleet, the directory is the first attempt by independent historians to collect and systematize the combat and non-combat losses of the USSR Navy during the Great Patriotic War of 1941-1945. Its structure is as simple as possible - first, the losses of the fleets (KBF, Black Sea Fleet with AVF, SF, Pacific Fleet) are given, then all the military flotillas that took part in the hostilities. In each section, losses are given by type - from the heaviest to the lighter.