What type of information is provided by the EFIS in an unusual attitude scenario?

The EFIS, or Electronic Flight Instrument System, is designed to present critical flight information to the pilot in a clear and organized manner, especially during unusual attitude scenarios. During such situations, the primary focus is on helping the pilot regain control of the aircraft by providing pivotal indicators of the aircraft's attitude without unnecessary distractions.

The choice that highlights "uncluttered unusual attitude information" signifies that the EFIS effectively simplifies the display to show essential data related to the aircraft's orientation, such as pitch and roll angles, while minimizing extraneous information. This is crucial for pilots to quickly assess their situation and take corrective actions without being overwhelmed by other data that might not be immediately relevant.

In contrast, while engine performance data, altitude deterioration information, and navigation data can be important in various flight phases, they are less critical in the immediate context of dealing with an unusual attitude, where clarity and quick understanding of the aircraft's position are paramount.