is, the payload adapter plates) spacecraft as a part of module activation outfitting process. Once the nadir end of SKKO is soft docked to Nauka and bolted down, the launch locks on SKKO will be released by the spacewalkers to allow it to be unfolded and extended with its joints self locking in the extended position to create a rigid frame. Then the Zenith end of SKKO is soft docked to Nauka and bolted down. The 3 passive payload adapters and the one active payload adapter (i.e. active remote sensing payload like MIR Priroda's Travers Synthetic Aperture Radar) are then outfitted. The SKKO is derived from the setup used on the Priroda module. SKKO will be launched inside the Progress spacecraft and transferred to a temporary storage location inside one of the station modules. It was taken outside and installed on the ERA aft facing base point on Nauka during the VKD-55 spacewalk. Further follow on hardware is not part of the modules activation outfitting spacewalk series and are yet to be assigned a flight. With the help of the SKKO system, located on the outer surface of the MLM-U, 5 universal workstations URM-N will appear, each of which is equipped with three payload adapters, due to which the total number of places for accommodating scientific equipment will be 16 pieces. The total weight of the equipment installed at the SKKO should not exceed 400 kg. Dockings See also Scientific research on the ISS Russian Orbital Segment Russian Orbital Service Station Notes References External links Description of MLM at Khrunichev.ru Photos of the incomplete FGB-2 at Khrunichev.ru (in Russian) MLM on Roskosmos official page (in Russian) Новости российского сегмента МКС (in Russian) – November 2004 article discussing plans for MLM MLM (FGB-2) module of the ISS – RussianSpaceWeb.com on the history of the module MLM (Nauka) – from Gunter's Space Page Russian components of the International Space Station Spacecraft launched in 2021 2021 in Russia Spacecraft launched by Proton rockets