Which type of sentry is responsible for controlling entry into aircraft carrying protection level (PL) 1 assets?

The close-in-sentry (CIS) is specifically tasked with safeguarding critical assets and overseeing the entry into areas where these assets are located, including aircraft that carry protection level (PL) 1 assets. The assets classified under PL 1 are of the highest importance to national security, typically including nuclear weapons and certain other vital military resources.

A close-in-sentry plays a crucial role in ensuring that only authorized personnel access the aircraft, maintaining stringent security protocols to prevent unauthorized access. This level of control is essential for safeguarding high-value military assets and ensuring operational integrity.

In contrast, other types of sentries serve different functions; external sentries may deal with perimeter security and broader area control, mobile sentries are typically more dynamic and could patrol a larger area, while static sentries are stationed at a fixed location but might not have the specialized focus on close-up protection of critically sensitive assets like the CIS does.