In nonradar scenarios at Aero Center, most altitude changes will be at whose discretion?

In nonradar scenarios, altitude changes are primarily under the control of the aircraft commander, who is responsible for the safety and operation of the flight. The aircraft commander has the ultimate authority to make decisions regarding the aircraft's altitude and course based on the current flight conditions, air traffic, and their own judgment. This authority reflects the responsibility the commander has for the safety of both the crew and passengers.

In these situations, while air traffic controllers do provide instructions and may suggest altitude changes, the final decision rests with the pilot. This is particularly true in nonradar environments, where real-time monitoring and guidance may be limited. Consequently, the pilot may opt for altitude changes based on their assessment of the situation, including engine performance, weather conditions, and separation from other air traffic.

The other roles listed, such as the flight controller, dispatch officer, and even co-pilots, do not have the authority to make unilateral decisions regarding altitude changes in flight. Their responsibilities are more focused on providing information, guidance, or assistance rather than making final operational decisions.