The function of a CRT in an EFIS is to

The function of a CRT in an EFIS is to

• A. Display alphanumeric data and digitize the display
• B. Display alphanumeric data
• C. Control flight guidance
• D. Provide weather radar images

Answer: (A)

The CRT in an EFIS serves as the primary visual display, turning digital information from the navigation and flight data systems into readable on-screen output. It shows alphanumeric data—labels, readouts, and identifiers—and renders numeric digits for the various flight parameters. This display role is what keeps the pilot informed, rather than controlling how the aircraft is guided or generating radar imagery. Flight guidance is provided by the flight director/autopilot, and weather radar data, when shown, is produced by the radar system but presented on the screen through the EFIS display. So, the CRT’s job is to present the data in a clear, digital format, not to control systems or create radar images.

The CRT in an EFIS serves as the primary visual display, turning digital information from the navigation and flight data systems into readable on-screen output. It shows alphanumeric data—labels, readouts, and identifiers—and renders numeric digits for the various flight parameters. This display role is what keeps the pilot informed, rather than controlling how the aircraft is guided or generating radar imagery. Flight guidance is provided by the flight director/autopilot, and weather radar data, when shown, is produced by the radar system but presented on the screen through the EFIS display. So, the CRT’s job is to present the data in a clear, digital format, not to control systems or create radar images.