Garmin GFC 600H Pilot's Manual page 15

The GTP is a remotely mounted temperature probe that interfaces to the Air Data
Computer for determination of OAT and true airspeed.
Some system configurations will utilize the Garmin GSU 75H ADAHRS solution. The
GSU 75H is a remotely mounted ADAHRS which incorporates the same components as
the GRS 79H and GDC 72H into a single unit providing attitude and air data.
GPS
A Garmin GPS is required as an aiding source for AHRS and for GPS based modes
including Groundspeed Hold and GPS navigation.
COLLECTIVE POSITION SENSOR
For some installations, a position sensor will provide collective position to the GFC
600H to improve FCS performance. Refer to aircraft specific FMS for details on whether
this sensor is present in the installation.
190-02081-04 Rev. A
GSU 75H
Garmin GFC 600H Pilot's Guide
System Overview
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