A pilot-physician formerly qualified as a combat systems officer (CSO) is eligible for which advanced rating?

The correct advanced rating for a pilot-physician formerly qualified as a combat systems officer (CSO) is the combination of Pilot and Flight Surgeon. This is because the individual's background as a physician complements their flying skills, allowing them to fulfill the dual roles of pilot and medical officer.

Being a Flight Surgeon requires not only an understanding of aviation operations but also extensive medical training to support the health and safety of aircrew. This dual qualification is quite valuable in military aviation, where the well-being of the crew is paramount.

In contrast, the other options include roles that do not align with the specific qualifications of a pilot-physician. A Flight Engineer requires distinct operational skills related to aircraft systems beyond the physician's expertise. Evaluator roles generally pertain to performance assessment in flight operations, which does not directly tie into the medical aspect that the Flight Surgeon role encompasses. Similarly, while Navigators play a critical role in aircrew, they do not integrate the medical training associated with a flight surgeon. Hence, the combined qualification of Pilot and Flight Surgeon is the most applicable for someone with the described background.