# Mounting the GPS/Compass
The GPS/Compass should be mounted on the frame as far away from other electronics as possible, with the direction marker pointing towards the front of the vehicle. The diagram below shows the heading marker on the Pixhawk 4 and compass.
# Compass Orientation
The compass can also be mounted in any other supported orientation, where the supported orientations can be seen in CAL_MAGn_ROT, and have the same meaning as used for orienting the flight controller.
You must mount the compass in a supported orientation!
If you mount the compass at an orientation that isn't supported, for example
Yaw 30, PX4 will detect the closest supported value.
This will result in errors/warnings, even if the calibration appeared to succeed.