> For the complete documentation index, see [llms.txt](https://aerogcs-green-docs.aeromegh.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://aerogcs-green-docs.aeromegh.com/8.-rpa-settings/8.4-compass-calibration-settings/8.4.2.-large-vehicle-calibration.md).

# 8.4.2. Large Vehicle Calibration:

In AeroGCS GREEN, the user can calibrate large vehicles by tapping the "Calibrate" button in front of the large vehicle calibration. After clicking "**Calibrate**," the following screen will appear.

<figure><img src="/files/rvbrbP16q1bB1YB4eHTZ" alt=""><figcaption><p>Large vehicle calibration</p></figcaption></figure>

on this screen user enters the value for magnetic declination to set and clicks on the “**Set**” button. This will set the value and will display the screen saying calibration complete please reboot the device as shown in the following screen.&#x20;

<figure><img src="/files/RmgiDnS9pGtL1EQ0jBwa" alt=""><figcaption><p>Large vehicle calibration complete</p></figcaption></figure>

This completes the Compass calibration process.