The Project 141, (NATO reporting name Kashtan class) is a class of salvage vessel/submersible support built at Rostock's Neptun Werft in East Germany for the Soviet Navy.

[2] The ships became part of the Russian Navy after the dissolution of the Soviet Union.

The stern has a crane capable of lifting 100 tons with which a Priz-class deep-submergence rescue vehicle (DSRV) can be launched and recovered.

[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.