Garmin G1000 Cockpit Reference Guide for the Columbia 350/400
1-4
SECTION 1
SYSTEM OVERVIEW
(16) ENT Key – Accepts a menu selection or data entry.
This key is used to approve an operation or complete data
entry. It is also used to confirm selections and information
entries.
(17) Dual ALT Knob – Sets the selected altitude in the
box located above the Altimeter. The large knob selects
the thousands, while the small knob selects the hundreds.
Altitude Select is used by the Automatic Flight Control
System in certain modes, in addition to the standard
G1000 Altitude Alerter function.
(18) AP Key – Engages/disengages the Autopilot and
Flight Director. Pressing the AP Key activates the Flight
Director and engages the Autopilot in the default pitch axis
and roll axis modes. Pressing the AP Key again disengages
the autopilot and deactivates the Flight Director.
(19) FD Key – Activates/deactivates the Flight Director
only. Pressing the FD Key turns on the Flight Director in
the default pitch axis and roll axis modes. Pressing the
FD Key again deactivates the Flight Director and removes
the command bars, unless the Autopilot is engaged. If the
Autopilot is engaged, the FD Key is disabled.
(20) NAV Key – Selects/deselects the Navigation mode.
(21) ALT Key – Selects/deselects the Altitude Hold
mode.
(22) VS Key – Selects/deselects the Vertical Speed mode.
(23) FLC Key – Selects/deselects the Flight Level Change
mode.
(24) HDG Key – Selects/deselects the Heading Select
mode.
(25) APR Key – Selects/deselects the Approach mode.
(26, 27) NOSE UP/NOSE DN Keys – Controls the
active pitch reference for the Pitch Hold, Vertical Speed,
and Flight Level Change modes.
1.2 GCU 476 CONTROLS
The indicators above the PFD, MFD, NAV, and
COM Keys are lit when the respective control mode
key is pressed. The unit is in MFD Control Mode by
default, until the PFD Control Mode selection key is
pressed.
Many of the controls duplicate the controls on the
PFD and MFD. The discussions later in this manual
are centered around using the controls on the PFD
and/or MFD. When reading these discussions, keep
in mind that many of the operations may also be
performed on the GCU 476.
Figure 1-2 MFD/PFD Control Unit (GCU 476)
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(1)

FPL Key

–

Displays the active Flight Plan Page for

creating and editing the active flight plan.

(2)

Direct-to Key

–

Allows the user to enter a destination

waypoint and establish a direct course to the selected