Cockpit Reference Guide

Garmin G1000 Cockpit Reference Guide for the Cessna Nav III
190-00384-11 Rev. A
SECTION 6 – AUTOMATIC
FLIGHT CONTROL
6-14
Changing the current VNAV Target Altitude while
VNAV Target Altitude Capture Mode is active causes the
flight director to revert to Pitch Hold Mode. Vertical Path
Tracking and the appropriate altitude capture mode are
armed in preparation to capture the new VNAV Target
Altitude or the Selected Altitude, depending on which
altitude is to be intercepted first.
VNAV target altitudes can be changed while editing the
active flight plan (see the Navigation section for details).
Glidepath Mode (GP)
NOTE: Pressing the CWS Button while Glidepath
Mode is active does not cancel the mode. The
autopilot guides the aircraft back to the glidepath
upon release of the CWS Button.
Figure 6-15 Glidepath Mode
Command Bars Indicate
Descent on Glidepath
Glidepath
Mode Active
GPS Approach
Mode Active
Glidepath
Indicator
LNAV
Approach
Active
GPS is Selected
Navigation
Source
NOTE: Glidepath Mode is available only in
installations with GIA 63W Integrated Avionics
Units and WAAS currently available.
Glidepath mode is used to track the WAAS-based
glidepath. Arming Glidepath Mode (annunciated in white
as ‘GP’) requires:
• Approach supporting WAAS vertical guidance is
loaded into the flight plan
• Expectedavailabilityofverticalguidance
• GPS ApproachMode isarmed, after acquiring
clearance for approach, prior to intercepting the
WAAS glidepath (GPS is the selected navigation
source and the APR Key is pressed; see GPS
Approach Mode)