GNSS status shows "NO GNSS" in red and does not move.

GNSS signal is not being received.

If you are using a smartphone or tablet, make sure that [Location] is turned on in the main unit settings. If you are using an external GNSS/GPS device, please check [Settings] - [GNSS] - [GNSS Acquisition Method], [Bluetooth Device], [USB Connection Settings], and [Internal Port Communication Settings]. Also, please check the installation and settings of the external GNSS/GPS device itself.