In non-radar scenarios, what are altitude changes typically based on at Aero Center?

In non-radar scenarios at an Aero Center, altitude changes are typically based on the pilot's discretion. This is because, in the absence of radar, air traffic control relies heavily on the pilot to maintain separation and manage their altitude safely. When pilots are operating under Instrument Flight Rules (IFR) outside of radar coverage, they are often given the flexibility to adjust their altitude as needed to ensure safety, avoid turbulence, or respond to changing weather conditions, as long as they remain within the minimum altitude requirements and follow the rules applicable to their flight.

The concept of pilot discretion emphasizes the trust placed in pilots to utilize their judgment and training effectively. Air traffic control provides initial clearances, and while they may provide traffic advisories and recommendations, the practical execution of altitude changes typically falls to the pilots in non-radar environments. This autonomy supports operational efficiency and safety, especially in less congested airspace.

In contrast, other options may imply a more restrictive or predetermined method of altitude management. For instance, relying solely on ATC clearance would not account for the flexibility required in these scenarios. Similarly, while automated systems might assist pilots, non-radar situations inherently limit their application since the technology to constantly monitor and instruct pilots is not available.