What range activates the automatic MFD map mode for terrain awareness alerting?

The automatic MFD (Multi-Function Display) map mode for terrain awareness alerting is activated at a range of 10 nautical miles. This range is specifically chosen to optimize situational awareness for pilots, allowing them to have access to terrain information that could be critical for flight safety. At 10 nautical miles, the display can effectively convey relevant terrain information without overloading the pilot with excessive details or clutter, which could occur at shorter or longer ranges.

This feature is designed to support proactive decision-making by providing timely alerts about terrain proximity, thus enhancing safety during flight operations. The choice of 10 nautical miles strikes a balance between giving pilots enough advance warning of potential terrain hazards and maintaining clarity in the display.