Which condition requires that Field C indicates a specific value?

Which condition requires that Field C indicates a specific value?

• A. Mode C is missing
• B. Controller-entered altitude does not match assigned altitude
• C. Both altitudes are within ±200 feet of block altitude limits
• D. All altitudes have been verified

Answer: (B)

The correct condition that requires Field C to indicate a specific value is when the controller-entered altitude does not match the assigned altitude. This is important because accurate altitude information is crucial for safe and efficient operations in air traffic control. When the controller enters an altitude that differs from what has been assigned, it raises a flag for potential issues, such as a discrepancy in what the aircraft is reporting versus what the controller expects. This discrepancy necessitates a specific response to ensure that the altitude information in Field C corresponds to an accurate and definitive state for managing air traffic safely. For clarity, the conditions outlined in the other options either do not necessitate a specific altitude value in Field C or do not directly relate to altitude discrepancies that would influence air traffic management in the same critical way.

The correct condition that requires Field C to indicate a specific value is when the controller-entered altitude does not match the assigned altitude. This is important because accurate altitude information is crucial for safe and efficient operations in air traffic control. When the controller enters an altitude that differs from what has been assigned, it raises a flag for potential issues, such as a discrepancy in what the aircraft is reporting versus what the controller expects. This discrepancy necessitates a specific response to ensure that the altitude information in Field C corresponds to an accurate and definitive state for managing air traffic safely.

For clarity, the conditions outlined in the other options either do not necessitate a specific altitude value in Field C or do not directly relate to altitude discrepancies that would influence air traffic management in the same critical way.