Which system must a runway have for DAAP restrictions to be lifted?

For DAAP (Dynamic Airspace Access Procedures) restrictions to be lifted, a runway needs to have an approved visual guidance system or an operational glide slope. This requirement ensures that pilots have the necessary visual references for safe and precise landings, which is particularly critical under certain conditions that would otherwise restrict access to the runway.

Having such systems in place allows for improved situational awareness and decision-making for pilots, fostering safer operations in busy airspace environments or during adverse weather conditions. The use of visual guidance systems, such as precision approach path indicators (PAPI) or instrument landing systems (ILS), enhances the capability of the runway to assist aircraft in landing, thereby justifying the lifting of certain airspace restrictions.

In contrast, redundant communication systems, minimum operational runways, and weather monitoring systems, while important for overall aviation safety and efficiency, do not specifically address the criteria under which DAAP restrictions are conditioned. Thus, they do not directly fulfill the requirements needed to lift these restrictions.