IFD500 Series Pilot Guide
Navigation 6-19
AUTO VLOC TUNING †
Auto-VLOC tuning is a user setting which enables the automatic
tuning of the active nav frequency to the navaid recommended by
the FMS. The FMS recommends a navaid based on the contents
of the flight plan.
If the active leg is part of a VHF approach, the FMS will auto-tune
the navaid that defines the final approach.
If the active leg is not part of a VHF approach and the nav
database defines a recommended navaid for the active leg, the
FMS will auto-tune that navaid. Otherwise, from the active leg,
the FMS will look backward through the route and forward
through the route for legs with a recommended navaid or that are
defined by a navaid. In the case where a navaid is found both
before and after the active leg, the IFD will tune the closer of the
two.
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