What should be placed outside to remind personnel to remove interior FOD barriers?

The use of flags as reminders for personnel to remove interior Foreign Object Debris (FOD) barriers serves a practical purpose by leveraging their visibility and association with caution or attention. Flags can be easily recognized from a distance, drawing attention to the need for action regarding FOD barriers. The act of placing flags can signal that a specific area needs to be checked, thus actively engaging personnel in FOD prevention practices.

While signboards, markers, and barriers can also serve as reminders, they might not provide the same immediate visual cue or awareness as flags do. Signs and markers may require closer inspection to interpret the message, which can lead to oversight if individuals are preoccupied with other tasks. Barriers, while crucial for preventing FOD in the first place, might not effectively communicate the need for action on their own. Therefore, flags stand out as an effective tool to prompt personnel to ensure safety and compliance with FOD policies.