Garmin GNS 480, Pilot'S Manual

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78
Basic Operation
Procedures
Flying the Procedure Turn
1. Within 30 nautical miles of the destination airport, the GNS 480
switches from “en route” mode to “terminal” mode (as indicated
in the lower left corner of the screen). The switch to terminal mode
is accompanied by a gradual Course Deviation Indicator (CDI) scale
transition from 2.0 to 1.0 nautical miles, full scale deflection.
2. For non-roll steering autopilots or manual flight, as you approach
the IAF (LYH), a waypoint message appears in the bottom of the
screen. As the distance (DIST) to the IAF approaches zero, the
message is replaced by a turn advisory (“Left/Right TO TRK 209°”).
Dial the outbound course of 205° into the CDI (or HSI) using the
OBS knob and initiate a standard rate turn to this course heading.
3. Fly the outbound course, keeping the CDI needle centered.
4. Once you have flown approximately one minute past the IAF
(LYH), the message “LEFT TO TRK 164°” appears on the bottom of
the screen. You may initiate the procedure turn at any time after
receiving this alert message.
5. Turn left to a heading of 160° to initiate the procedure turn.
Course guidance is provided relative to the outbound leg from the
FAF. The procedure turn is displayed on the Map Page and indicated
as the active leg on the Default NAV and Active Flight Plan pages.
The CDI needle starts moving to the right.
6. After approximately one minute, the GNS 480 will provide a message “RIGHT TO TRK 340°,” the CDI
needle swings to the opposite side to provide proper sensing along the final course segment and
“RIGHT TO TRK 025°” appears on the bottom of the screen when the final approach course becomes
the active leg.
NOTE : For roll steering-capable autopilots, the final approach course may be set at the IAF. The
GNS 480 will fly the entire procedure automatically.
7. As the CDI needle starts to center, make a right turn to 025° — the final approach course.
RW04
DO NOT
USE FOR
NAVIGATION
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