Garmin G300 Installation Manual page 34

4.6 Mounting Requirements
Mount the GSU 73 aligned with either the X or Y axis of the aircraft. The direction of the unit will be
accounted for during the calibration procedure as shown in Figure 4-3.
Figure 4-3. GSU 73 Orientation Calibration
The GSU 73 includes an extremely sensitive strap-down inertial measurement unit. It must be mounted
rigidly to the aircraft primary structure, preferably to a metallic structure to conduct heat away from the
unit. Do not mount the GSU 73 in an enclosed area, it should be mounted in a location that provides
adequate airflow to comply with the maximum outer case temperature listed in Section 4.3.
Page 4-6 G300 Installation Manual – GSU 73
Revision A 190-00921-01