Integrated Electronic Standby Instrument (IESI) is a battery powered Aviation Standby Instrument. It provides the pilot with an emergency back-up for primary flight navigation information to the destination in case of plane power or main navigation equipment failure.

The display interface of Integrated Electronic Standby Instrument includes azimuth, attitude, altitude and airspeed of the plane. It is composed with the Strapdown Navigation system and the Atmosphere system. It features as follows: output entire navigation information, low power consume, small volume, light weight, high precision, easy servicing, high reliability, I-intensity LED backlight, etc.