This operation was called "Atrina" and it took place back in 1987. But even in our time a special division of the Northern fleet Russian Navy. This is the "Animal Division".
They say about these boats that these are the very "workhorses" that helped preserve underwater parity in the hard 90s. "Pike-B", or "Shark" according to NATO classification, is, whatever one may say, a predator. Toothy, fast, agile, and therefore extremely dangerous. This is the real master of the sea. All boats of the division bear the names of predators and fully correspond to them.