The most recent cat-and-mouse game last week involved Northern Fleet submarines Nizhny Novgorod and Pskov in "fighting and tracking" war games.
"They performed electronic launches and, at the conclusion of the drilling, actual torpedo launches without warheads," said the official Russian government newspaper Rossiyskaya Gazeta.
"Prior to that, submarines conducted submersions to maximum depth and tested new weapons in the Norwegian Sea."
Another "duel" – with an unclear submarine representing the western enemy – was conducted by the ships Alexander Nevksy and Vladimir Monomakh off the coast of Kamchatka.
Rossiyskaya Gazeta claimed that its Western military enemies were "more alarmed" by Russian training sessions in the North Atlantic designed to "penetrate an anti-submarine barrier that the Alliance deployed between Greenland, Iceland and Scotland" equipped with the sonar system. SOSUS
Participation in the exercise of Sierra Nizhny Novgorod and Pskov class III submarines "caused special alarm to NATO military analysts."
The report stated: "They are nicknamed & quot; titanium destroyers & quot; for the hull material and variety of missions carried out, the main one being the destruction of enemy strategic submarines and carrier groups at the start of a conflict.
"High-speed submarines are capable of secretly moving at great depth and their weaponry – torpedoes, rocket torpedoes and Kalibr missiles – make boats of this kind among the most formidable marine predators."