When turning to 360°, what condition must be met according to ATC instructions?

Turning to 360° in accordance with ATC instructions requires a clear directive from Air Traffic Control. This means that the pilot must always prioritize ATC instructions above altitude considerations or time in the air when performing such maneuvers. In this specific scenario, the requirement to turn after reaching 4200' MSL aligns with ATC protocol, which emphasizes the importance of maintaining safe altitude levels while following air traffic directives.

When ATC provides instructions that specify altitude, it ensures the safety and compliance of flight operations within controlled airspace. While various altitude thresholds exist, the most critical factor remains the adherence to instructions given by ATC. The correct procedure will typically involve the pilot confirming their altitude before executing the turn, thus ensuring full compliance with safety regulations.