What is EFIS in avionics?
An EFIS normally consists of a primary flight display (PFD), multi-function display (MFD), and an engine indicating and crew alerting system (EICAS) display. Early EFIS models used cathode-ray tube (CRT) displays, but liquid crystal displays (LCD) are now more common. Modern aircraft use advanced displays for navigation and operational data: Primary Flight Display (PFD): Shows critical flight information, including airspeed, altitude, and attitude in one view. Multi-Function Display (MFD):Provides additional information like navigation maps, weather data, and system status.