Flying The Procedure Turn - Garmin GNC 420 Pilot's Manual & Reference

PROCEDURES
5
Procedure Turn
Approach Example
70

Flying the Procedure Turn

1. Within 30 nautical miles of the destination air-
port, the GNC 420 will switch from "enroute"
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 transi-
tion from 5.0 to 1.0 nautical miles, full scale
deflection. (See example, top left.)
2. Several miles prior to reaching the IAF
(LYH), you may wish to review the approach
sequence. Press the key to display
F
the active flight plan page. Press the small
r
right knob ( ) and rotate the large right
d
knob ( ) to review each segment of the
approach. When finished, press
F
to return to the previous page.
3. As you approach the IAF (LYH), a waypoint
alert ("NEXT DTK 205°") will appear in the
lower right corner of the screen. As the
distance (DIS) to the IAF approaches zero,
the alert is replaced by a turn advisory
("TURN TO 205°"). 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.
4. Fly the outbound course, keeping the CDI
needle centered.
5. Once you have flown approximately one minute past the FAF (LYH), the alert message
"START PROC TURN " will appear in the lower right corner of the screen. You may initiate the procedure
turn at any time after receiving this alert message.
again
DO NOT USE FOR
NAVIGATION