In aviation, what is the primary function of a Layover?

The primary function of a layover in aviation is to provide rest time for crews between flights. Flight crews, including pilots and flight attendants, have regulations governing the maximum duty hours they can work without a required rest period. Layovers are scheduled times between flights to ensure that crew members can obtain adequate rest, which is crucial for safety during operations. This rest time allows them to recover from fatigue and be alert for their next flight operation, thereby maintaining the safety standards that are vital in aviation.

In the context of other options, while aircraft refueling, maintenance checks, and waiting for delayed passengers might occur at times during a layover, they are not the primary purpose of this scheduled break. The focus of a layover revolves around ensuring that crew members are well-rested and ready to perform their duties effectively on subsequent flights.