e) Calibrating the compass
The quadrocopter has a compass that allows it to detect its direction and that it needs for flight in headless mode.
The quadrocopter automatically initiates when the rechargeable battery is connected to the quadrocopter (see 10. d).
Directly after the rechargeable battery is connected, quadrocopter initialisation and compass calibration
start. This will take about 3 seconds.
Do not move the quadrocopter during this time!
Figure 9
53