On October 21, 2021 Knyaz Oleg submarine of the Borey/Project 955A type conducted its first missile launch. The Bulava missile was launched from a submerged submarine deployed in the White Sea to the Kura test site in Kamchatka. The ministry of defense reported that all warheads "successfully arrived to the designated area."

Knyaz Oleg has net been accepted for service yet. She began sea trials in May 2021. This launch is said to be part of the "state trials" of the submarine.

Construction of Knyaz Oleg began in 2014. It is the fifth ship of the Project 955/955A class and the second one in the Project 955A series. According to TASS sources, the submarine will be accepted for service by the end of 2021.