Yes. It restricts your oxygen intake. You need oxygen for your red blood cells which flow through your entire body. The less oxygen they have,the more your body has to work at getting oxygen. Basically you tire more quickly and more often. It's also puts more of a strain on your heart. That's BAD! Go … Read more

Go to this website. It's the best I can do. This has a lot of information on the old Soviet navy and it's history. Unfortunately it doesn't have an exact count. The Soviets were and still are very quite about things.     GO TO      wikipedia.org/wiki/Russian_Navy#The_Imperial_Russian_Navy