Which of the following is a requirement regarding fatigue for RPAS crew members?

The requirement that RPAS crew members must not operate the Remote Piloted Aircraft System (RPAS) if suffering from fatigue focuses on the safety and effectiveness of flight operations. Fatigue can significantly impair a person's judgment, reaction times, and overall ability to operate an aircraft safely. This standard is in place to ensure that pilots are alert and capable of making sound decisions during operations.

Regulations often emphasize the importance of crew members being well-rested and free of any impairments that could arise from fatigue, thus helping to prevent accidents and incidents related to human error. Acknowledging and addressing fatigue is crucial in aviation safety management.

The other options may include practices and recommendations that can support safety, but they do not directly address the core requirement concerning fatigue management for RPAS operations. For example, working in shifts or simulator training might be part of operational procedures, but they don’t specifically mandate that a crew member cannot fly while fatigued. Taking a caffeine break could potentially help with alertness, but it is not a formal requirement concerning fatigue management in drone operations. Trained personnel should prioritize their well-being to maintain the highest standards of safety in flying operations.