What area is always shown to scale on an Instrument Approach Plate?

What area is always shown to scale on an Instrument Approach Plate?

• A. the area inside the solid line circle
• B. the entire chart
• C. the runway outline only
• D. the minimums box

Answer: (A)

The part of the instrument approach plate that shows the actual approach geometry—the runway, procedure fixes, and the final approach path inside the defined boundary—is drawn to scale. This area, often bounded by a solid line circle, is where distances and relationships between fixes and the runway are accurate, so you can measure and verify your position on the approach. Other elements on the chart, like the minimums box or place where the airport diagram sits, aren’t guaranteed to be to scale and are provided for reference rather than distance measurement.

The part of the instrument approach plate that shows the actual approach geometry—the runway, procedure fixes, and the final approach path inside the defined boundary—is drawn to scale. This area, often bounded by a solid line circle, is where distances and relationships between fixes and the runway are accurate, so you can measure and verify your position on the approach. Other elements on the chart, like the minimums box or place where the airport diagram sits, aren’t guaranteed to be to scale and are provided for reference rather than distance measurement.