Garmin G3X Pilot's Manual page 23

• GMU 44
Magnetometer: Measures the local magnetic field and sends data to the AHRS
–
for processing to determine aircraft magnetic heading. This unit receives power
directly from the AHRS and communicates with it via an RS-485 digital interface.
• GTP 59
Temperature Probe: Provides raw air temperature data.
–
190-01115-00 Rev. J
GMU 44
GTP 59
Garmin G3X Pilot's Guide
System Overview
3