When is it necessary to notify Air Traffic Control?

Notifying Air Traffic Control (ATC) is crucial for maintaining safety and efficiency within controlled airspace. When it is likely that a flyaway—a situation where an aircraft may leave the intended flight path—will enter controlled airspace, informing ATC is vital to ensure that other traffic is aware of the potential risk and can adjust accordingly. This communication allows ATC to provide necessary guidance and ensure separation from other aircraft, thus enhancing situational awareness and safety.

In contrast, while planning a long flight is important, it does not inherently require immediate notification to ATC unless it involves entering controlled airspace. Routine maintenance, while necessary for aircraft safety, does not require ATC notification as it does not pertain to operations in the airspace. Additionally, not every flight requires a notification before it takes off unless specific conditions apply. Therefore, the emphasis on notifying ATC when a flyaway may enter controlled airspace is key to preventing potential conflicts and ensuring overall aviation safety.