What does a dashed yellow line mean on the airfield?

Answer: B — Non-movement area boundary

A dashed yellow line on the airfield indicates the non-movement area boundary. This boundary helps to distinguish between areas where aircraft are actively taxiing and where they are not allowed to operate. The non-movement area includes places where vehicles can move without requiring air traffic control clearance, such as parking areas and certain service roads. In contrast, solid yellow lines typically mark the boundaries of movement areas, such as runways and taxiways, where operational control and clearance are essential for safety. Understanding these distinctions is crucial for maintaining safe practices on the airfield and ensuring compliance with regulations.