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TAKEOFF TOUR
190-00357-00 Rev E
Key and Knob Functions
Bottom Row Keys
NRST
The nearest key (NRST) (GPS
500W) displays the Nearest Airports
page. Then, turning the small right
knob steps through the NRST pages.
CDI
The CDI key (GNS 530W) is used to
toggle the navigation source (GPS or
VLOC)whichprovidesoutputtoan
externalHSIorCDI.
OBS
The OBS key is used to select
manual or automatic sequencing of
waypoints. Pressing this key selects
OBS mode, which retains the current
“active to” waypoint as your naviga-
tion reference even after passing the
waypoint (i.e., prevents sequencing
to the next waypoint). Pressing the
OBS key again returns to normal
operation, with automatic sequenc-
ing of waypoints. Whenever OBS
mode is selected, you may set the
desired course to/from a waypoint
using the OBS Page, or an external
OBSselectoronyourHSIorCDI.
MSG
The message key (MSG) is used to
view system messages and to alert you
to important warnings and require-
ments when the MSG annunciator is
displayed. See Sections 12 and 9 for
more information on messages and
unit settings.
FPL
The flight plan key (FPL) allows
you to create, edit, activate and
invert flight plans, as well as access
approaches, departures and arrivals.
A closest point to flight plan feature
is also available from the flight plan
key. See Section 4 for more informa-
tion on flight plans.
VNAV
The vertical navigation key
(VNAV) allows you to create a three-
dimensional profile which guides
you to a final (target) altitude at a
specified location. See Section 10.
PROC
The procedures key (PROC) allows
you to select approaches, departures
and arrivals from your flight plan.
When using a flight plan, available
procedures for your departure and/or
arrival airport are offered automati-
cally. Otherwise, you may select the
desired airport, then the desired
procedure.
GPS 500W
GNS 530W