What should always be checked before entering the airfield?

Before entering the airfield, it is crucial to verify personal credentials and vehicle permits to ensure compliance with security protocols and regulations. Airfields require strict access control to maintain safety and security. This means that only authorized personnel who have the proper identification and permissions can enter. Checking personal credentials ensures that individuals on the airfield have been vetted and are allowed access, which is essential for maintaining operational integrity and safety.

While considerations such as fuel levels, weather conditions, and passenger counts are important for safe vehicle operation and flight safety, they do not directly pertain to the critical security protocols associated with gaining access to an airfield. Ensuring the validity of personal credentials and vehicle permits takes precedence as it directly addresses security measures essential for operating within a restricted area.