Russia, nine submarines of the northern fleet on active duty
Nine submarines of the northern fleet are on patrol in rotation. AND’ how they communicate by the Russian Admiralty.
The Russians, deterrent patrol to cover possible targets, have the class submarine Borey, Yury Dolgoruky and two Delta IV, the Karelia and the Novomoskovsk. Navigating the class attack submarine Akula, Pantera, and the missile launcher class Oscar II, Smolensk.
Source: Defense Online