|
An electronic flight instrument system, or EFIS, is a flight deck instrument display system in which the display
technology used is electronic rather than electromechanical. EFIS normally consists of a primary flight display
(PFD), multi-function display (MFD) and Engine Indicating and Crew Alerting System (EICAS) display. Although
cathode ray tube (CRT) displays were used at first, liquid crystal displays (LCD) are now more common.
The complex electromechanical attitude director indicator (ADI) and horizontal situation indicator (HSI) were the
first candidates for replacement by EFIS. However, there are now few flight deck instruments for which no
electronic display is available. |
