Russian does the most courageous decisions in the field of modernization of the "cold war" samples. Among the latest upgrades powerful submarines type "Northwind" and "Ash" deserve special attention. Here are 5 Russian killer machines.
Nuclear Boat "Pike-B" - submarine, which was named during the construction "Bars" 971, and Nato classified it as "Shark". "Pike-B" is a heavy threat after several upgrades of the postwar period.