Automatic Flight Control System (Optional) - Garmin G3X Pilot's Manual

System Overview
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The G3X CDI SRC Softkey (refer to Section 1.7) becomes available when more than
one source of navigation data is configured. The CDI SRC Softkey toggles between
the available navigation sources (e.g., between the internal G3X GPS and external
SL30 VLOC sources, between an SL30 and a GNS 430, or between two GNS 430s, etc).
Refer to the Flight Instruments section for more information.
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When using a WAAS enabled external GPS navigator (i.e., GNS 430W/530W, GNS
480 or any GTN Series navigator), and configuring an RS-232 input for 'MapMX'
instead of 'Aviation In', a more accurate depiction of the flight plan legs are displayed
on the moving map (i.e., holds, procedure turns, etc). Non-WAAS external navigators
do not support MapMX. Refer to the G3X Installation Manual for more information.
EXTERNAL GPS NAVIGATOR FAILURE
In the event that all configured external GPS navigators fail, the G3X reverts to its
internal VFR GPS for navigation and flight plan modifications.

AUTOMATIC FLIGHT CONTROL SYSTEM (OPTIONAL)

The G3X can also communicate with Garmin GSA 28, Garmin GMC 305 and
various third-party autopilot units. With the AFCS configured, the G3X issues pitch
and roll steering commands to the autopilot unit. Refer to Section 9 (AFCS) for more
information.
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Garmin G3X Pilot's Guide
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190-01115-00 Rev. K