 Out of the two existing submarines of this class, the "Pskov" was in overhaul between 2011-2015 according the Russian website Deep storm, thus it's likely that the submarine present in the North Atlantic in 2012 was the other one ("Nizhniy Novgorod").The aforementioned website acknowledges activity of "Nizhniy Novgorod" that period under the command of Captain 1st Rank Alexey Ananko (submarine was reportedly active in 2008 and 2013) 

Both submarines took part in large exercise in October 2019.The sole possible submarine of the Project 945AB was laid down in March 1990 but was scrapped in November 1993 before completion.