Many dramas and tragedies that befell the domestic Soviet Navy are unjustly forgotten. Among them is the death of the Voroshilovsk mine layer in 1950 when unloading mines off Russky Island, a M-200 submarine that collided with a destroyer in 1956 "Statny," the mysterious disappearance of the S-117 submarine and the entire crew during the exercises in 1956, the dramatic campaign of the 69th submarine brigade of the Northern Fleet to Cuba in 1962, the mysterious death of a nuclear submarine K-8 during the exercises "Ocean-70" near the Azores in 1970... This and much more is described in the book of the writer and journalist captain 1st rank Vladimir Shigin.