Garmin G600 Pilot's Manual page 54

NOTE: For LOC BC approaches, the course pointer will slew 180 degrees
from the inbound course.
Example of activating Auto-Slewing in the G600:
Course Pointer slewed
Figure 2-28 Auto-Slewing HSI with ILS Loaded and Shown with the Corresonding
1) The aircraft is flying vectors to final on an active ILS approach, with the
appropriate approach in the GNS navigator.
2) The appropriate ILS frequency must be activate in the navigator.
3) Verify that the waypoints for the approach are displayed on the Nav Map Page
or the FPL Page of the MFD.
4) Upon approaching the final course, select NAV on the HSI.
NOTE: If auto CDI switching is active on the GNS unit, the GNS will force
the GNS/GDU 620 to NAV when the aircraft is close to the LOC course.
5) The CDI and course pointer will change from magenta to green and the pointer
will move, or slew, to the final approach course (or 180° from the final approach
course for LOC BC approaches).
2-18
to 218° for the ILS
Approach Plate
Garmin G600 Pilot's Guide 190-00601-02 Rev. B