Russian components of the International Space Station
ISS Russian orbital segment after docking of UM Prichal moduleCosmonaut Nikolai Budarin working inside one of the crew quarters aboard Zvezda service module
The Russian Orbital Segment (ROS) is the name given to the components of the International Space Station (ISS) constructed in Russia and operated by the Russian Roscosmos. The ROS handles Guidance, Navigation, and Control for the entire Station.[1]