Cosmonauts Oleg Artemyev and Sergey Prokopyev practice using the TORU, or telerobotically-operated rendezvous system, inside the Zvezda service module.
If necessary a crew member could use the TORU to manually dock an approaching Russian Progress cargo craft at the space station in case of an emergency.

Credit: Roscosmos iss056e081639 (July 6, 2018) — Larger image