If an aircraft is flying below an airway, do they need to seek permission to continue?

In general aviation, aircraft flying below designated airways do not require permission to continue their flight. This is because the airspace below controlled airways is classified as unrestricted airspace, allowing pilots the flexibility to operate without needing clearance from air traffic control. Pilots must, however, adhere to specific regulations applicable to the airspace they are operating in, such as maintaining appropriate altitude, communication protocols, and visual or instrument flight rules.

While there are instances where special airspace restrictions or conditions could necessitate some form of communication with air traffic control, the general principle remains that under normal circumstances, no permission is required simply to fly below an airway. This allows for greater freedom of movement for general aviation pilots, especially in non-congested areas.

The other choices imply requirements that are not consistent with standard operating procedures regarding airspace and flight operations. Therefore, the answer that a pilot does not need permission to continue flying below an airway accurately reflects the regulations governing airspace use.