What type of markings indicate the boundaries of the manoeuvring area?

The boundaries of the manoeuvring area at an airport are indicated by specific airport markings, which include a single solid yellow line and a single yellow dashed line. The solid line denotes the edge of the manoeuvring area, indicating where vehicles should not cross without appropriate clearance. The dashed line serves to provide a visual cue that allows vehicles to enter this area when it is safe to do so. This marking system helps ensure the safety and organization of ground operations, as it clearly defines the separation between the manoeuvring area and other operational zones.

The other options do not reflect the established marking standards. A single solid yellow line alone would not provide the necessary guidance for entering the manoeuvring area, while a double solid yellow line would imply that crossing is absolutely prohibited, which is not the case in this situation. Therefore, the combination of a solid and dashed line is essential for proper navigation and compliance within the airfield environment.