Garmin G1000 NXi Pilot's Manual page 378

AUTOMATIC FLIGHT CONTROL SYSTEM
BACKCOURSE MODE (BC)
When making a backcourse approach, set the Selected Course to the localizer front course.
NOTE:
Backcourse Mode captures and tracks a localizer signal in the backcourse direction. The mode may be
selected by pressing the BC Key. Backcourse Mode is armed if the CDI is greater than one dot when the mode
is selected. If the CDI is less than one dot, Backcourse Mode is automatically captured when the BC Key is
pressed. The flight director creates roll steering commands from the Selected Course and deviation when in
Backcourse Mode.
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hangIng The
If the navigation source is VOR or localizer or OBS Mode has been enabled when using GPS, the Selected
Course is controlled using the CRS Knob corresponding to the selected flight director (CRS1 for the pilot
side, CRS2 for the copilot side).
Pressing the CWS Button and hand-flying the aircraft does not reset any reference data while in Backcourse
Mode. The autopilot guides the aircraft back to the Selected Course when the CWS Button is released.
INTERCEPTING AND FLYING A DME ARC
The AFCS will intercept and track a DME arc that is part of the active flight plan provided that GPS
Navigation Mode is engaged, GPS is the active navigation source on the CDI, and the DME arc segment is
the active flight plan leg. It is important to note that automatic navigation of DME arcs is based on GPS.
Thus, even if the APR key is pressed and LOC or VOR Approach Mode is armed prior to reaching the Initial
Approach Fix (IAF), Approach Mode will not activate until the arc segment is completed.
364
Backcourse
Mode Active
LOC2 is Selected Navigation Source
Figure 7-24 Backcourse Mode
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eleCTeD oUrSe
Garmin G1000 NXi Pilot's Guide for the Cessna Nav III
190-02177-00 Rev. A