"Invisible" submarine "Velikiye Luki" with "Caliber" missiles on board will be accepted into the Navy by the end of the year
Industry source: it is currently undergoing factory sea trials
DEPL «Velikie Luki»
"Kalibr"-Carrying Corvettes and the "Velikiye Luki" Submarine to Join the Baltic Fleet in 2024
Some vessels are already undergoing trials at naval ranges