>>64058576
Sovie- I mean Russian submarine doctrine places a high priority on boomers operating in 'safe' zones located primarily underneath the north pole. These are called bastions and its a strategy used by many other navies. Also many of their submarines (especially in the last few years) have fallen into disrepair. Still their strategy works and there is no reason to discount them. Not until they have another Kursk situation, anyhow.