Altitude Hold Mode (Alt) - Garmin G3X Touch Pilot's Manual

Setting the selected altitude (Integrated Autopilot Interface):
1) Touch the autopilot, and touch ALT.
2) Touch the Selected Altitude on the PFD, and use the keypad to enter the
desired Selected Altitude.
Setting the selected altitude (GMC 305):
1) Touch the autopilot, and touch ALT.
2) Touch the Selected Altitude on the PFD, and use the keypad to enter the
desired Selected Altitude.
Changing the Selected Altitude while Selected Altitude Capture Mode is
active causes the autopilot to revert to Pitch Hold Mode with Selected Altitude
Capture Mode armed for the new Selected Altitude.

ALTITUDE HOLD MODE (ALT)

Altitude Hold Mode can be activated by touching ALT or ALT Key (GMC
305); the AFCS maintains the current aircraft altitude (to the nearest 10
feet) as the Altitude Reference. The Altitude Reference, shown in the G3X
Touch Autopilot 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 G3X Touch Autopilot Status Box.
Altitude Hold Mode is automatically armed when in Selected Altitude
Capture Mode. Selected Altitude Capture Mode automatically transitions to
Altitude Hold Mode when within 50 feet of the Selected Altitude. In this case,
the Selected Altitude becomes the Altitude Reference.
CHANGING THE ALTITUDE REFERENCE
When operating in Altitude Hold Mode, the Altitude Reference can be
adjusted in the following ways:
• The Altitude Reference can be adjusted up or down in 10-foot
increments by Nose Up or Nose Down or rolling the NOSE UP/DN
Wheel (GMC 305). Using this method, up to 200 feet of altitude
change can be commanded. To change the Altitude Reference by
more the 200 feet, use the CWS button (if equipped) as described
below, or climb/descend using another vertical mode (PIT, VS) to
capture the desired Selected Altitude.
190-01754-00 Rev. A Garmin G3X Touch Pilot's Guide
AFCS
229