Garmin GNC 420AW GPS Receiver User Manual


 
5 - PROCEDURES
108
190-00356-00 Rev E
DO NOT USE FOR
NAVIGATION
NOTE: From this point on, primary navigation is
provided by the VLOC receiver. You may continue
to use the GPS receiver for supplemental naviga-
tion guidance only. If automatic CDI switching is
disabled (“Manual” selected), the reminder mes-
sage “Select VLOC on CDI for approach” appears
at 2.0 NM prior to the FAF. In this instance, you
must press CDI to manually switch CDI output to
the VLOC receiver and continue the approach.
11. As you approach the FAF (SHUTR), “LNAV”
will appear in the lower left corner of the
screen —indicating a CDI scale transition from
TERM to approach scaling. This scale transi-
tion applies only to the default NAV page’s
on-screen CDI, since the external CDI or HSI is
now coupled to the VLOC receiver.
12. Also as you approach SHUTR, a waypoint alert
(“DTK 210° x S”) will appear in the lower right
corner of the screen.
13. As you cross SHUTR, the destination sequences
to the MAP (“RW21”, the runway threshold).
With the needle on the external CDI (or HSI)
centered, fly toward the MAP, observing the
altitude minimums dictated by the approach
plate. (When viewing the map page, you’ll note
that the final course segment is displayed in
magenta — the active leg of the flight plan
always appears in magenta — and a dashed
line extends the course beyond the MAP.)
14. As you approach the MAP, a waypoint alert
(“ARRIVING WPT”) will appear in the lower
right corner.
15. As you cross the MAP, “SUSP” will appear
above the OBS key, indicating that automatic
sequencing of approach waypoints will be
suspended at the MAP.
ILS Approach