6-10 Arrivals / Approaches / Landing
CDI deflection will be driven by the localizer signal itself,
regardless of the course setting.
The HDI and VDI will automatically display on the ADI when the
appropriate localizer and glideslope signals are received.
Automatic mode switching (Primary Nav source and autopilot) will
occur if the primary nav frequency can be auto-identified. If auto
tuning has not been enabled on the setup pages, or a station can
not be identified, automatic mode switching will not work.
PRECISION APPROACHES
On ILS/LOC approaches with a Vectors-to-Final transition, the
FMS will automatically toggle the autopilot from HDG to NAV on
intercepting the localizer. APPR mode will automatically activate
after the intercept and the Primary Nav LSK will automatically
change from FMS to Nav1 to track the localizer and glide slope.
Conversely, it will toggle the Primary Nav LSK from Nav1 back to
FMS when going missed at the Missed Approach Point.
Precision SBAS approaches are flown in NAV mode on the
autopilot using FMS as the Primary Nav LSK selection and no
switching is required.
NON-PRECISION APPROACHES
As with the case in precision approaches, as long as the
published approach is entered into the FMS as part of the active
flight plan, the inbound course and all switching between FMS
and NAV is done automatically. Non-precision approaches can
make good use of the VS mode of the autopilot. Set the VS Bug
at the desired descent rate (the VSR can provide an accurate
cue), and consider using the autopilot to generate a controlled
descent to the published approach minimum descent altitude
(MDA). The Altitude Bug can be set to a desired intermediate
level off altitude or the MDA as a visual reminder. Use VS
(engaged) ALT (armed) on descents.
BACK COURSE APPROACHES
This system is designed to fully support flying back course
localizer approaches. To perform a back course approach,
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