3 - "Kalralahr is the Kilrathi equivalent to the Confederation Space Marshal - he controls whole sectors or commands large fleet operations." (ibid) In actual practice, the rank of Space Marshal is not used in this manner. Only two characters have been known to hold the rank, both of whom effectively commanded the Space Navy proper at the time (Sandra Gregarov and Geoffrey Tolwyn). Conversely, it is not a given that the highest ranking officer in the navy will be a Space Marshal - Wayne Spencer Banbridge, who ran the war effort operationally for many years, never attained the rank.. Astronaut ranks and positions Jump to Joseph P. Kerwin, first American physician in space Space Shuttle: Commander Overall mission success, safety of crew and Shuttle, maneuvers Shuttle with assistance from Pilot. John Young, commander of the first Shuttle mission All Shuttle commanders have prior spaceflight experience. Requires a degree in engineering, biological science, physical . Modern Rank Insignia Chart. The chart below shows the complete breakdown of Space Navy, Space Forces and Kilrathi ranks, along with the appropriate rank insignia where appropriate..