What do designation signs indicate?

Designation signs indicate specific locations on an airport, such as military installations or international sites. These signs are crucial for pilots and ground personnel as they help in identifying the entrance to restricted areas, ensuring that operations in those zones are carried out safely and in compliance with regulations. By clearly marking these special locations, designation signs support situational awareness and navigation within the airport environment, particularly in areas that may have unique requirements or restrictions compared to standard operational areas.

The other options refer to different types of signs or indicators used at airports. For example, signs that indicate distance remaining to the runway provide information about the distance pilots have left to reach the runway threshold, while taxiway intersection signs guide pilots through the complex network of taxiways. Noise abatement procedures are associated with operational practices intended to minimize noise exposure near airports but are not indicated by specific signage like designation signs.