Altitude Hold Mode (Alt) - Garmin G900X Pilot's Manual

ALTITUDE HOLD MODE (ALT)

Altitude Hold Mode can be activated by pressing the ALT Key; the flight director maintains the current aircraft
altitude (to the nearest 10 feet) as the Altitude Reference. The flight director' s Altitude Reference, shown in the
AFCS Status Box, is independent of the Selected Altitude, displayed above the Altimeter. Altitude Hold Mode
active is indicated by a green 'ALT' annunciation in the AFCS Status Box.
Altitude Hold Mode is automatically armed when the flight director is in Selected Altitude Capture Mode (see
Figure 7-6). Selected Altitude Capture Mode automatically transitions to Altitude Hold Mode when the altitude
error is less than 50 feet. In this case, the Selected Altitude becomes the flight director' s Altitude Reference.
CHANGING THE ALTITUDE REFERENCE
Turning the ALT Knob while in Altitude Hold Mode changes the Selected Altitude, but not the flight
NOTE:
director's Altitude Reference, and does not cancel the mode.
With the CWS Button depressed, the aircraft can be hand-flown to a new Altitude Reference. When the
CWS Button is released at the desired altitude, the new altitude is established as the Altitude Reference.
190-00726-00 Rev. J
Command Bars Hold Pitch Attitude
to Maintain Altitude Reference
Figure 7-7 Altitude Hold Mode
Garmin G900X Pilot's Guide
AUTOMATIC FLIGHT CONTROL SYSTEM
Altitude Hold Altitude
Mode Active Reference
Selected
Altitude
Selected
Altitude
Bug
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