Garmin G3X Installation Manual page 20

1.3.3 External Navigators (Optional)
The G3X can interface with the SL30 Nav/Comm Transceiver and the GNS 400/500 series units (Figure
1-1) for use as external navigators.
In a configuration which includes one or more external GPS navigators (i.e., GNS 400/500 Series), the
G3X displays the selected external GPS Navigator's flight plan and guidance information. This may
include information from the external navigator such as arrivals and departures, etc. which are not part of
the G3X database (the G3X database contains only FAF and MAP approach info).
Do not use the approach information provided by the VFR navigation database residing
within the G3X as a means of navigating any instrument approach. The G3X VFR
navigation database is limited to providing only the waypoints for the final approach leg
of a published procedure. These waypoints and associated course line are made available
for monitoring purposes only.
When using an external GPS navigator with the G3X, changes to the active flight plan must be entered on
the external GPS unit, and the following G3X functions are disabled:
• Direct-to Key
• Flight Plan List (LIST) Page
• OBS Mode activation from the G3X (i.e., the 'Set OBS and Hold' PFD menu option is disabled).
When an external navigator that supports both GPS and VOR/ILS capabilities (i.e. GNS 430/530) is
selected, the external navigator's CDI Key is used to switch the G3X HSI between GPS and VOR/ILS
navigation.
In the event that all configured external GPS navigators fail, the G3X reverts to its internal VFR GPS for
navigation; flight plan modification is then allowed via the G3X.
Page 1-4
Revision E
WARNING
• Waypoint addition, deletion, or change
• Approach selection (Active Flight Plan (ACTV) Page)
G3X Installation Manual –Installation Overview
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