This was reported to TASS by the head of the All-Russian Fleet Support Movement, Vladimir Maltsev. By the way, it was originally planned to transfer the submarine to the Russian Navy in the second half of 2021. She was removed from the boathouse of the Zvyozdochka Ship Repair Center at the end of December 2020.
“RG” reported that this is the first submarine of the third generation of submarines, which is undergoing medium repair and modernization. We have already replaced electronic weapons, control systems, communications, navigation, hydroacoustics.
Leopard is a Project 971 nuclear submarine. It entered the Russian Navy in 1992.