How is the scheduled service normal scheduled rest determined when a flight is less than 8 hours?

When determining the scheduled service normal scheduled rest for flights that are less than 8 hours, the correct amount of rest is 9 hours. This policy is designed to ensure that crew members have adequate rest to maintain safety and performance standards. The regulation specifies that for shorter flights, a minimum of 9 hours of rest is necessary to mitigate fatigue and ensure that pilots and crew are well-rested.

The 9-hour rest requirement is based on industry standards that consider the psychological and physiological needs of flight crews. This rest period allows crew members to recover from the demands of their duty, especially when operating flights that might involve night travel or challenging conditions.

In contrast, the other options indicate amounts of rest that exceed the necessary requirements for flights under 8 hours, which can lead to unnecessary constraints on scheduling and operational flexibility. The 9-hour rest period properly balances fatigue management while allowing for efficient flight operations within the regulatory framework.