What does the appearance of "EXCESS" in the upper right corner of the ND MAP format indicate?

The appearance of "EXCESS" in the upper right corner of the Navigation Display (ND) in MAP format specifically indicates that too many symbols have been selected for display. This warning is a crucial aspect of managing the display resources on the ND.

When the ND is tasked with showing an overwhelming number of symbols due to selected data sources or options, it cannot adequately represent all of them without compromising clarity or accuracy. As a result, it triggers the "EXCESS" message as a visual alert for the pilot, indicating that they should consider reducing the number of displays activated to ensure essential information remains visible.

This awareness helps pilots maintain situational awareness and avoid potential clutter on the display during critical phases of flight or navigation. By managing the quantity of displayed symbology, pilots can prioritize key information and enhance operational effectiveness.