Garmin G1000 NXi Pilot's Manual page 79

GPS steering guidance is still provided after the CDI automatically changes to LOC until LOC capture, up
to the Final Approach Fix (FAF) for an ILS approach, or until GPS information becomes invalid. Activating a
Vector-to-Final (VTF) also causes the CDI to switch to LOC navigation source. GPS steering guidance is not
provided after the change.
On some ILS approaches where the glideslope intercept point is at or in close proximity to the fix prior to the
FAF), it is possible to be above the glideslope when the navigation source automatically changes from GPS to
LOC. The probability of this occurring varies based on air temperature.
Fix Prior to the FAF
Glideslope Intercept Point
GPS CDI SCALING
When GPS is the selected navigation source, the flight plan legs are sequenced automatically and
annunciations appear on the HSI for the flight phase. Flight phase annunciations are normally shown in
magenta, but when cautionary conditions exist the color changes to amber. If the current leg in the flight plan
is a heading leg, 'HDG LEG' is annunciated in magenta beneath the aircraft symbol.
The current GPS CDI scale setting is displayed as System CDI on the 'Aux - System Setup 1' Page and
the full-scale deflection setting may also be selected (2.0 nm, 1.0 nm, 0.3 nm, or Auto) from this page. If
the selected scaling is smaller than the automatic setting for enroute and terminal phases, the CDI is scaled
accordingly and the selected setting is displayed rather than the flight phase annunciation.
Changing the selected GPS CDI setting:
1) Use the FMS Knob to select the 'Aux - System Setup 1' Page on the MFD.
2) Push the FMS Knob to activate the cursor.
3) Turn the large FMS Knob to highlight the Format Allowed selection in the 'GPS CDI' box.
4) Turn the small FMS Knob to highlight the desired setting and press the ENT Key.
5) To cancel the selection, push the FMS Knob or the CLR Key.
190-02177-02 Rev. A
Figure 2-25 ILS Approach with Glideslope Intercept Point at Fix Prior to the FAF
Garmin G1000 NXi Pilot's Guide for the Cessna NAV III
FLIGHT INSTRUMENTS
59