What happens when the EHSI is in HSI normal mode and the MAP button is pressed?

When the EHSI (Electronic Horizontal Situation Indicator) is in HSI normal mode and the MAP button is pressed, the display switches to navigation map mode. This transition is integral to the functionality of the EHSI, which is designed to provide pilots with situational awareness regarding their flight path, including waypoints, airspace, and other navigational information essential for effective navigation.

In navigation map mode, the EHSI presents a graphical representation of the aircraft's position relative to its route, making it easier for pilots to visualize their navigation environment and make informed decisions. This enhancement improves situational awareness, especially during flight operations that require precise navigation.

The other options do not accurately describe the function of the MAP button within the context of the EHSI. While attitude indicators, route planning, and radar information are important in aviation, they pertain to different functionalities that do not engage when the MAP button is utilized in this scenario. Thus, the focus remains on the transition to navigation map mode as a key feature of the EHSI.