Do not issue ? instructions dependent upon the movement of arrival aircraft on the runway

Do not issue ? instructions dependent upon the movement of arrival aircraft on the runway

• A. General
• B. Precautionary
• C. Restricted
• D. Conditional

Answer: (D)

Conditional instructions are those that take effect only if a specific condition occurs. When an arrival aircraft is on the runway, that movement can be unpredictable and outside direct control. Tying an instruction to that movement means it may not trigger as expected, could be misunderstood, or arrive at an unsafe moment, which makes timing and sequencing uncertain. For safety and clarity, you avoid issuing conditional instructions that depend on the arrival traffic’s actual movement on the runway. Use clear, unconditional instructions or other instruction types you can verify and enforce without waiting for a contingent event.

Conditional instructions are those that take effect only if a specific condition occurs. When an arrival aircraft is on the runway, that movement can be unpredictable and outside direct control. Tying an instruction to that movement means it may not trigger as expected, could be misunderstood, or arrive at an unsafe moment, which makes timing and sequencing uncertain. For safety and clarity, you avoid issuing conditional instructions that depend on the arrival traffic’s actual movement on the runway. Use clear, unconditional instructions or other instruction types you can verify and enforce without waiting for a contingent event.