Which type of instructions should not be dependent on the movement of arrival aircraft on the runway?

• A. Conditional
• B. Immediate
• C. Routine
• D. Standard

Answer: (A)

Conditional instructions are inherently tied to specific circumstances or criteria being met before they are implemented. These instructions depend on the context of flight operations, typically involving situations like weather conditions, operational constraints, or specific requests from pilots. Because they require a situational trigger, they should not be dependent on the movement of arrival aircraft on the runway.

In contrast, immediate, routine, and standard instructions are more straightforward. Immediate instructions need quick action that often responds directly to ongoing operations, including the presence and movement of aircraft on the runway. Routine instructions are typically standard operational procedures that apply regularly and consider the general flow of air traffic. Standard instructions provide baseline guidance that is widely applicable without unique situational requirements.