Garmin GPS 400W,GNC 420W Pilot's Manual & Reference page 96

5 - PROCEDURES
Procedure Turn Approach
Flying the Procedure Turn
1. Within 31 nautical miles of the destination
airport, the 400W-series will switch 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. (See example below)
2. Several miles prior to reaching the IAF (LYH),
you may wish to review the approach sequence.
Press the FPL key to display the active flight
plan page. Press the small right knob, and
then turn the large right knob to review each
segment of the approach.When finished, press
FPL again to return to the previous page.
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3. As you approach the IAF (LYH), a waypoint alert
("LT TO 205° x S") 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 ("LT TO 205° NOW"). The
unit will guide you automatically, or you can
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 "LT TO
160° x S" will appear in the lower right corner
of the screen. You may initiate the procedure
turn at any time after receiving this alert mes-
sage.