What key should be pressed to display the COMM/NAV Summary page?

The COMM/NAV Summary page provides important information regarding communication and navigation systems within the aircraft. To access this summary page, selecting the COMM key is essential. This action brings up a comprehensive overview of COMM/NAV configurations, statuses, frequencies, and other vital data relevant to the aircraft's communication and navigation capabilities.

The other options, while related to different functionalities, do not directly access the COMM/NAV Summary page. For instance, pressing MSN would likely direct the user to a different set of mission-related data, Slew is typically used for maneuvering cursor movements on the display, and IDX may serve as a tool for initializing data inputs or accessing specific index pages but not specifically for opening the COMM/NAV Summary. Thus, pressing the COMM key is the most appropriate action to view the desired summary information.