# Before flight checklist

{% hint style="info" %}
This checklist contains critical parts of the system that need to be checked before flight to ensure proper functionality. If some step is unclear please refer to the training videos or to the previous sections.
{% endhint %}

### Nexus Stribog UAV - mechanical inspection

* [ ] Inspect all propellers for damage.
* [ ] Make sure the foldable arms are locked in unfolded position.
* [ ] Make sure the batteries are locked and secured with the pin.
* [ ] Make sure the balancing connector is attached to the dummy connector on the battery. If it isn't, connect it.
* [ ] Make sure that legs are securely connected.
* [ ] Make sure that the 360° camera is connected.
* [ ] Ensure both antennas are properly attached.
* [ ] Ensure that protection of the payload is removed.

### Mast setup - mechanical inspection

* [ ] Ensure the mast is set up on stable ground or securely fastened.
* [ ] Make sure that DoodleLabs radio is rigidly mounted on the mast.
* [ ] Make sure that DoodleLabs radio has battery mounted.
* [ ] Make sure that both DoodleLabs antennas are connected.
  * [ ] Omnidirectional antenna is directly connected to the DoodleLabs wearable module.
  * [ ] Directional antenna connects to DoodleLabs module with extender cable.
* [ ] Ensure the directional antenna is firmly fixed and aimed towards the expected flight path.
* [ ] Ensure that the directional antenna has the extender cable connected.
* [ ] Ensure that the USB-C to Ethernet adapter is connected to port **ETH USB-H** on the DoodleLabs module and secured with pins.
* [ ] Ensure that USB-C to Ethernet adapter has the ethernet cable connected.
* [ ] Make sure the Ethernet cable is fully stretched to the right spot.

### GCS setup - mechanical inspection

* [ ] Ensure that rugged Getac laptop is interconnected with DoodleLabs module via ethernet cable.
* [ ] Ensure that rugged Getac laptop has hardware two-factor authentication key connected to it.
* [ ] Ensure that rugged Getac laptop is interconnected with external controller via USB-C cable.
* [ ] Ensure that the external controller is connected to the rugged Getac laptop using the top USB-C port.

{% hint style="success" %}
If all checkboxes are checked you can power up the system.
{% endhint %}

{% hint style="danger" %}
If some of the checkbox is not checked please refer to the troubleshooting or maintenance part of the documentation.
{% endhint %}

***


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