Magnetic Declination Setting
After the generated parameter file has been uploaded, the final step is to set the magnetic declination.
The result you got from the magnetic declination and inclination page must be entered using the GCS. The inclination was already used in the calculations and is included in the generated .param file, so you do not need to update it, but the declination (0.5 in the example) needs to be set.
So, enter the correct declination value in the Edit PIDs -> Special Settings -> Diverse -> Magnetic Declination field, and press ‘Transmit to AQ‘ and then reply ‘Yes‘ to the prompt about saving values to ROM. This will permanently store the value in AQ (until the next firmware update).
That’s it, you should now be ready for the first careful flight test. Again, make sure you have done all the calibration steps before flying.
A tool to determine your declination & inclination: http://magnetic-declination.com