In June 2014 it was reported that SS-750 had participated in sea trials in the Baltic Sea of a Bester-1 submersible.[3]
On 6 September 2022 Russia's Ministry of Defence informed that SS-750 had participated in sea trials in the Baltic Sea of two new, improved Kilo-class submarines[4] and on 6 October there was again news of SS-750 having participated in sea trials in the Baltic Sea, this time with a single submarine.[5]
In April 2023 the Danish Defence Command confirmed that on 22 September 2022 SS-750 and the Priz-class submersible AS-26 that it can launch were among six Russian Navy ships operating in the area where four days later the 2022 Nord Stream pipeline sabotage occurred.[6][7]