# Integrated Electronic Standby System (IESS)

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/integrated-electronic-standby-system-iess-image-g7vps1km.png)

### BRIGHTNESS ADJUSTMENT BUTTONS <a href="#toc118376632" id="toc118376632"></a>

* Adjusts brightness

### AIRSPEED ROLLING DIGITS <a href="#toc118376633" id="toc118376633"></a>

* Indicates actual calibrated airspeed.

### ILS BUTTON <a href="#toc118376634" id="toc118376634"></a>

* <mark style="color:red;">Selects the display of ILS 1 deviations.</mark>

### REFERENCE BAROMETRIC PRESSURE INDICATION <a href="#toc118376635" id="toc118376635"></a>

* Indicates the barometric pressure as set by the barometric rotary knob.

### STANDARD BUTTON <a href="#toc118376636" id="toc118376636"></a>

* Sets the barometric pressure to standard atmospheric pressure.

### BRIGHTNESS CELL <a href="#toc118376637" id="toc118376637"></a>

* Automatically adjusts the instrument brightness according to the ambient lighting.

### ALTITUDE INDICATION <a href="#toc118376638" id="toc118376638"></a>

* Indicates actual altitude.
* Green hashed box appears on the left side of the numeric digits when altitude is below 10.000 ft.
* Minus (-) symbol appears on the left side when altitude is below sea level.

### BARO ROTARY KNOB <a href="#toc118376639" id="toc118376639"></a>

* Adjusts the barometric setting.

### CAGE BUTTON <a href="#toc118376640" id="toc118376640"></a>

* <mark style="color:red;">Resets attitude to zero, eliminating accumulated drift when the button is pressed for more than 2 seconds.</mark>
* <mark style="color:red;">Must be used with wings levelled on stabilized flight conditions.</mark>
* <mark style="color:red;">When pressed an amber CAGE flag is displayed on the upper right corner for the IESS.</mark>

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/integrated-electronic-standby-system-iess-image-ai7mnt7l.png)

### ROLL INDICATION AND SLIP/SKID INDICATION <a href="#toc118376641" id="toc118376641"></a>

* Indicates the bank angle of the airplane.
* Bottom half of the triangle indicates slip or skid angle if flight is not coordinated.

### AIRPLANE SYMBOL <a href="#toc118376642" id="toc118376642"></a>

* Reference for airplane attitude indication.

### VERTICAL SPEED <a href="#toc118376643" id="toc118376643"></a>

* Indicates the actual vertical speed (ft/min).
* Arrow indicates climb or descent.

### ILS DEVIATIONS <a href="#toc118376644" id="toc118376644"></a>

* <mark style="color:red;">Green diamond indicates glide slope and localizer position.</mark>

### Vmo/Mmo BARBER POLE <a href="#toc118376645" id="toc118376645"></a>

* Displayed when Vmo/Mmo is within the viewable range.

### METER ALTITUDE INDICATION <a href="#toc118376646" id="toc118376646"></a>

* Indicates the actual altitude in meters.

### PITCH ANGLE SCALE <a href="#toc118376647" id="toc118376647"></a>

* Provides a pitch angle indication between the airplane symbol and the horizon line.

### MACH NUMBER INDICATION <a href="#toc118376648" id="toc118376648"></a>

* Displays Mach speed.

### ALIGNMENT <a href="#toc118376649" id="toc118376649"></a>

* Takes about 90 seconds to align.


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