The Nodal Module (NM) is a pressurized module of the Russian Segment (RS or ROS) of the International Space Station (ISS) and will be used after the deorbit of the ISS in the OPSEK space station. NM was developed by RSC Energia in order to support the docking to ISS RS of two scientific and power modules during the final stage of the segment assembly and to provide on this segment additional docking ports to receive Soyuz TMA and Progress M spacecraft.