Pilot's Guide

5-34
Garmin G600 Pilot’s Guide
190-00601-02 Rev. F
Foreword
Sec 1
System
Sec 2
PFD
Sec 3
MFD
Sec 4
Hazard
Avoidance
Sec 5
Additional
Features
Sec 6
Annun.
& Alerts
Sec 7
Symbols
Sec 8
GlossaryAppendix A
Appendix B
Index
5.6.4.2 Autopilot Operation with the GDU 620 Emulating GPSS
In order to provide GPSS functionality for autopilots that do not have built-in
GPSS support, the GDU 620 can convert the GPSS commands into a heading
signal. When GPSS mode is turned on, the autopilot heading mode will follow
the GPSS commands instead of the heading bug. Refer to the Airplane Flight
Manual and autopilot system documentation for instructions on how to use the
autopilot heading mode.
Depending on the installation, GPSS mode may be toggled on/off with an
external switch or by pressing and holding the HDG key on the PFD. If the
installation uses the HDG key on the PFD, the PFD knob window will display
the GPSS/HDG mode options.
GPSS OFF GPSS ON
Figure 5-31 GPSS mode control with the HDG key
When GPSS mode is on, the heading bug on the HSI changes to a hollow
outline and a crossed-out heading bug appears in the PFD Knob Mode Indicator,
indicating that the autopilot is not coupled to the heading bug. The bug is still
controllable and may still be used by the pilot for reference. GPSS is annunciated
in the lower left portion of the PFD. The GPSS mode annunciation depends on
the location of the NAV STATUS information, as shown in the following figure.
NAV Status Style 1 NAV Status Style 2
Figure 5-32 GPSS Mode Annunciations
5.6.5 Flight Director Display
If autopilot flight director commands are interfaced to the G600, they will be
presented as a single cue flight director on the PFD. Control of the flight director
is accomplished via the autopilot/flight director controller; there are no pilot
controls or adjustments for the flight director on the G600.
The G600 system limits the distance the flight director pitch commands may