Avidyne IFD540, Руководство пилота

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5-15 Navigation
COURSE CHANGES AND HOLDS
If the course change at a waypoint is more than 120°, the IFD will
issue an alert approximately 30 seconds prior to the turn. For
course changes less than 120°, the alert will be issued
approximately 10 seconds prior to the turn.
For normal leg transitions, the alert text will be “Next Leg xxx° in x
seconds” where xxx is the course and x is the number of seconds
left until the turn. When the next leg is a hold, however, the alert
text shows the entry type. It will be “Teardrop Entry”, or “Parallel
Entry” or “Hold Course xxx°” where xxx is the inbound course of
the hold, representing a direct entry.
If the course change at a waypoint is greater than 135
°
, then the
FMS will treat the waypoint as a “fly-over” waypoint. If the course
change at a waypoint is less than or equal to 135
°
, then the FMS
will treat the waypoint as a “fly-by” waypoint meaning lead turns
beginning up to a maximum of 2.5nm can be expected.
AUTO VLOC TUNING
Auto-VLOC tuning is a user option which enables the automatic
tuning of the active nav frequency slot to follow the governing
navaid in the flight plan.
If the active leg is part of a VHF-based approach, the FMS will
auto-tune the navaid that defines the final approach.
If the active leg is not part of a VHF-based approach, and if the
active leg has a recommended navaid in the database, 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 which case, the FMS auto-tunes the one of those
two navaids that is closer to the aircraft.