When a red alert occurs, which tools must be used to investigate it?

• A. Radar and/or Graphic Plans Display (GPD)
• B. Visual observation only
• C. Pilot reports
• D. Weather radar data

Answer: (A)

Red alerts call for real-time, integrated situational awareness. Radar and the Graphic Plans Display provide the necessary combination: radar shows current aircraft positions and movements, while the Graphic Plans Display links those positions to the actual flight plans, routes, and sector context, often with overlays like weather. This pairing lets you quickly locate the aircraft involved, confirm the alert’s cause, assess potential conflicts or weather impact, and decide on the appropriate response. Relying on visual observation alone can miss hidden issues when visibility is poor, pilot reports can be delayed or incomplete, and weather radar data alone shows precipitation but not how aircraft are positioned or how routes are affected.