Backcourse Mode (Bc) - Garmin GFC 600 Pilot's Manual

AFCS

BACKCOURSE MODE (BC)

Pressing the BC key selects Backcourse mode. Backcourse mode captures and tracks
a localizer signal in the backcourse direction.
When making a backcourse approach, set the Selected Course to the
NOTE:
localizer front course.
The Flight Director creates roll steering commands from the Selected Course and
deviation when in Backcourse mode. If the Course Deviation Indicator (CDI) shows
greater than half scale when the BC key is pressed, the mode is armed. If the CDI is
less than half scale, Backcourse mode is automatically captured.
When the AFCS is interfaced to a DG, Backcourse mode cannot be
NOTE:
armed. Set the Selected Heading on the DG to the same value as the Selected
Course when Backcourse mode is active.
GMC 605 AND GI 285 ANNUNCIATIONS
The GMC 605 and GI 285 will annunciate 'BC' for Backcourse mode.
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GMC 605 Annunciating Backcourse Mode
GI 285 Annunciating Backcourse Mode
Garmin GFC 600 Pilot's Guide 190-01488-00 Rev. B