IFD500 Series Pilot Guide
6-18 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 as either “Teardrop Entry”, “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.
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