М-200 Месть (Myest, meaning "vengeance" or "revenge") was a Malyutka class (Serie XV) short-range, diesel attack submarine of the Soviet Navy.

The submarine's emergency buoy was located at 21:05 hours, and communications were established with the remaining survivors in compartment one, the forward torpedo room.

By 04:00 hours the next morning, 22 November, the men in the submarine were prepared to use their escape equipment to leave the wreck, but were ordered to remain aboard while the senior officers on the surface developed plans to lift the boat with a floating crane.

However, the weather had deteriorated, and when the rescue vessels began to drag anchor and the telephone cable to the sunken wreck parted, the attempt was abandoned.

At 03:47 hours the next morning, 23 November, divers located the wreck, and learned that the previous evening, after the telephone line parted and communications were lost, the survivors had decided to disobey orders, and escape on their own.