Submarines are exceptional tools of warfare and transportation. When powered by nuclear fuel, their reach is practically unlimited, and the travel is possible to any corner of the globe, skipping storms or other possible dangers that could lurk above.
With a nuclear submarine, you can easily voyage even to the Arctic ocean, below a thick layer of ice. There is only one substantial question: how do you punch through all that ice if you want to surface?
In fact, this process of going up through the sheet of ice is a dangerous and complicated process, requiring a lot of skill training and involving certain knowledge of physics to make this endeavor possible. Watch the following video to find out how it is done: