> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/systems-guide/main-panel/primary-flight-display-pfd/lateral-vertical-deviation-indication.md).

# LATERAL/VERTICAL DEVIATION INDICATION

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![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/primary-flight-display-pfd-image-wpkcvtec.png)

### ADI LATERAL DEVIATION <a href="#toc118376568" id="toc118376568"></a>

* Magenta diamond for FMS deviation. Green trapezoid pointer used for LOC.
* When both are displayed during PREV mode the FMS pointer overwrites the LOC pointer when both are at the same point. In PREV mode the trapezoid is displayed in cyan.
* When a valid deviation is not available a X is depicted.

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/primary-flight-display-pfd-image-v0u499h9.png)

### VERTICAL DEVIATION SCALE AND POINTER <a href="#toc118376569" id="toc118376569"></a>

* Pointer is controlled by the selected primary navigation source (PNS).
* Vertical deviation scale is displayed when:
  * Localizer (LOC) is selected as the PNS.
  * FMS is selected as the PNS, and the FMS commands the VNAV vertical scale in view.
* ILS LOC deviation pointer is a green trapezoid. VNAV FMS is a magenta hollow diamond.
* When glideslope data is invalid or when the vertical deviation scale is commanded into view by the FMS and a valid deviation is not available a X is depicted.
* Preview vertical deviation is displayed when LOC is the PREV source.
* LOC and FMS deviation are displayed the same way as the lateral deviation.