Each of these roles carries responsibilities that are essential to the operation of a spacecraft.
Members of the NASA Astronaut Corps hold one of two ranks.
Shannon Walker, Crew-1 Cosmonauts are professional space travellers from Russia.
Similarly to NASA, members of the China National Space Administration (CNSA) hold one of two ranks.
The positions of Spacecraft Pilot, Flight Engineer, and Mission Payload Specialist were listed in the announcement for the Group 3 selection.