K-51 Verkhoturie submarine of the Project 667BDRM/Delta IV class arrived to the Zvezdochka shipyard in Severodvinsk for a scheduled repair and overhaul. K-51 Verkhoturie was the first ship of its class to undergo an overhaul - it was completed in December 1999.

It is possible that the current round of overhaul will include installation of Sineva missiles on the submarine - in 1999 these missiles were simply not available for deployment, so K-51 probably carries older R-29RM missiles.