Avidyne IFD410 FMS/GPS, Pilot'S Manual

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IFD400 Series Pilot Guide
Navigation 5-25
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 is done automatically. All switching
between GPS and VLOC (if appropriate) is also done
automatically.
†
Procedure turns and holds-in-lieu-of-procedure-turn, when part of
a published procedure, appear as normal legs in the flight plan
and therefore have no special or different procedures
– just fly
them as part of the flight plan.
DME arc legs and approaches are supported by the system.
TIPS AND TECHNIQUES
CDI Deflection During VOR Approaches
When VOR and GPS inbound courses are not co-
aligned, a large CDI deflection may occur when the
Nav Source transitions from GPS to VLOC.
BACK COURSE APPROACHES
†
This system is designed to fully support flying back course
localizer approaches.
If the published back course approach is entered into the FMS,
the IFD nav source will a
utomatically toggle from “GPS  VLOC”
to “VLOC” when all transition criteria have been met outside the
FAF and it will automatically tune the localizer frequency into the
active nav channel. The Nav Mode datablock should display the
localizer ID, landing airfield ID and the front course runway ID.
When integrated with an EFIS (e.g. Avidyne PFD, Aspen PFD,
etc), the front course may need to be manually entered and then
“Back Course” should be displayed on the EFIS.
SBAS APPROACHES
LPV (RNAV) approaches are the preferred approach for the IFD,
if available. On installation, a configuration setting determines
whether the IFD is SBAS-capable. If the IFD is not capable of
SBAS, the following procedures do not apply.