Another Russian sub goes missing,

 Who said History never repeats itself?

In the history of the modern Russian navy (from the late 1970s), there has been an almost constant concern for the West. Not where are their subs, or what are they doing? 

The worry is how can they lose so many at such as constant rate?

During the 70's, they lost a nuclear sub at the rate of one every two months, in the Baltic Sea; lost without trace, and to this day there is no explanation to what caused them to sink.

The latest to go "missing" happened this week, they lost a sub under the Arctic ice. The problem is Russia doesn't track the subs in case America hacks the links; each sub can go months under water without surfacing, and then only for a few minutes so it cannot be tracked.

If you saw Ice Station Zebra you would be wrong to consider a sub can break through the ice.

Sad as it is, the best hope for the sailors is they died in an explosion. There are far worse death that submariners face, even in the modern age of stealth combat.