Its probably just an exercise
All armed forces go on exercises periodically, Russia included. They probably can't do live fire exercises in the Baltic or Black Sea without causing a whole lot of trouble so the next best thing would be to go out into the Atlantic far from anyone else. In this case they were proposing working about 150 miles of the Irish coast but the Irish government objected so they just moved elsewhere.
Nothing to see here, folks.
Biting the hand that feeds IT
