# 3.5. Calibration (operate when necessary)

Click the Advanced Settings button to open the Advanced Settings page.

<figure><img src="/files/sejmYCq8tJfxgK7EtgOT" alt=""><figcaption></figcaption></figure>

3.5.1. Compass calibration.

{% hint style="info" %}
Compass calibration is required when drone is equipped with one GPS module, if drone is with RTK or D-GPS, compass calibration is no longer needed.
{% endhint %}

<figure><img src="/files/KswbaetXxYrCvVzJuf5g" alt=""><figcaption></figcaption></figure>

3.5.2. Remote control mode check

{% hint style="info" %}
Change the flight mode on radio controller and chcek from the ground station whether the mode on ground station software is consistent.
{% endhint %}

<figure><img src="/files/4oTQvZrN8HiZJLbXhtlm" alt=""><figcaption></figcaption></figure>


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