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Garmin GFC 600 Pilot’s Guide
190-01488-00 Rev. B
48
AFCS
APPROACH MODES (GPS, VOR, LOC)
NOTE:
Availability of Approach Modes depends on the installed navigation
equipment capabilities and interfaces.
NOTE:
The selected navigation receiver must have a valid VOR or LOC
signal or active GPS course for the Flight Director to enter Approach Mode.
Approach mode is selected by pressing the
APR
key. Approach mode acquires
and tracks the selected navigation source (GPS, VOR, or LOC), depending on
approach loaded in the navigator. This mode uses the selected navigation receiver
deviation and desired course inputs to fly the approach. Pressing the
APR
key
when the CDI deflection is greater than half scale arms the selected approach mode.
GMC 605 Annunciating GPS Approach Mode Armed
If the CDI deflection is less than half scale, the approach is automatically captured
when the
APR
key is pressed
When the AFCS is interfaced to a Directional Gyro (as opposed to an HSI), Approach
mode cannot be armed. The pilot must align the aircraft to be on course with the CDI
displaying less than half scale of deviation and then press the
APR
key to force capture
in Approach mode. The GMC 605 will display a message ‘SET HDG=CRS’ while any
Approach mode is active.
NOTE:
When the AFCS is interfaced to a DG, set the Selected Heading on
the DG to the same value as the Selected Course when an Approach mode
is active.
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