The duty period for pilots is based on which specific type of time?

The duty period for pilots is typically based on domicile time, which refers to the local time applicable to the location of the pilot's home base or domicile. This is important for several reasons. First, it ensures that pilots adhere to regulations regarding rest periods and duty limits in accordance with the local time zone where they are stationed. As pilots can operate in multiple time zones throughout their flights, using domicile time provides a consistent reference point for managing their schedules and ensuring safety.

In contrast, flight time refers to the actual time spent in the air, while local time could vary depending on the location of each specific flight. Universal time, often known as Coordinated Universal Time (UTC), is useful for global coordination but is not employed for duty period calculations because pilots need to consider the local regulations and schedules relevant to their specific domicile. Understanding these nuances helps ensure compliance with aviation regulations regarding pilot duty and rest periods.