N7 Autopilot User Manual (ArduPilot) v1.0
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2.4.6 Compass Calibration
Before compass calibration, it assumes that you have at least one compass, either
internally or externally in the system, and it has been enabled.
CAUTION
Do not calibrate the compasses near any metallic or magnetic field producing object
(computers, cell phones, metal desks, power supplies, etc.) or incorrect calibration will occur.
Please configure the external compass as the main compass in priority.
Calibration Steps
1. Under SETUP| Mandatory Hardware select Compass.