Redut-KM (RUS-2 Redut-KM) - a surface vessel surveillance radar, primarily designed for the detection of aerial targets, derived from the RUS-2 radar as an upgrade of the Redut-K radar for the needs of Project 23 class battleships. Unlike the first versions of the radar, the RUS-2 already had only one antenna common for both receiving and transmitting. However, no real deployment on board occurred, as none of the battleships of this class were completed.