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Key and Knob
The CDI key is used to toggle which navigation source (GPS or VLOC) pro-
vides output to an external HSI or CDI.The OBS key is used to select manual or automatic sequencing of waypoints.
Pressing the OBS key selects OBS mode, which will retain the current “active
to” waypoint as your navigation reference even after passing the waypoint (i.e.,
prevents sequencing to the next waypoint). Pressing the OBS key again will
return to normal operation, with automatic sequencing of waypoints. When-
ever OBS mode is selected, you may set the desired course to/from a waypoint
using the OBS Page, or an external OBS selector on your HSI or CDI.The message key is used to view system messages and to alert you to impor-
tant warnings and requirements. See Sections 10 and 9 for more information
on messages and unit settings.
The flight plan key 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
information on flight plans.
The procedures key allows you to select and remove approaches, departures
and arrivals from your flight plan. When using a flight plan, available proce-
dures for your departure and/or arrival airport are offered automatically.
Otherwise, you may select the desired airport, then the desired procedure.
Whenever the GNS 430 is displaying a list of
information that is too long for the display
screen, a scroll bar will appear along the
right-hand side of the display. The scroll bar
graphically indicates the number of additional
items available within the selected category.
Simply press the small right knob (
activate the cursor and rotate the large right
) to scroll through the list.
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The GARMIN GNS 430 provides you accurate navigational data and communi-
cation capability, along with non-precision and precision approach certification in
the IFR environment. The Takeoff Tour is designed to familiarize you with the
operation of the GNS 430 — including powering up the unit, changing frequen-
cies, entering data, performing a simple direct-to, selecting IFR procedures and
provides a limited introduction to using flight plans. In addition, this section briefly
covers the default navigation, map and frequency pages available as part of the
NAV page group. These pages will be used for most of your in-flight navigation.
The Takeoff Tour assumes that the unit and antennas have been properly
installed and you have not changed any of the GNS 430’s default settings. If you
have changed any of the factory default settings (position format, units of measure,
selectable fields, etc.), the pictures shown here may not exactly match what you see
on your GNS 430. Prior to using your GNS 430 for the first time, we recommend
that you taxi to a location that is well away from buildings and other aircraft so the
unit can collect satellite data without interruption.
Powering up the GNS 430The GNS 430’s power and COM volume are controlled using the
volume) knob at the top left corner of the unit. Rotating it clockwise will turn unit
power on and increase the COM radio volume. After turning the unit on, a
welcome pagewill be displayed while the unit performs a self test, followed by the
the land data page.
The database confirmation page will appear next, which shows the current data-
base information on the NavData card (with the valid operating dates, cycle num-
ber and database type indicated). The database is updated every 28 days, and must
be current for approved instrument approach operations. Information on database
subscriptions is available inside your GNS 430 package.
To acknowledge the database information, press the
The database confirmation page shows the
effective and expiration dates of the Jeppesen
database on the NavData Card.The welcome page appears when the GNS
430 is turned on. During the time this screen
is displayed, the GNS 430 performs a self-test
to ensure proper operation.
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Once the database has been acknowledged, the instrument panel self-test pagewill
appear. To ensure that your GNS 430 and any connected instruments are working
properly, check for the following indications on your CDI/HSI , RMI, external annun-
ciators and other connected instruments:
• Course deviation - half left / no flag • Glideslope - half up / no flag
• TO/FROM flag - TO • Time to destination - 4 minutes
• Bearing to destination - 135° • Desired track - 149.5°
• Distance to dest. - 10.0 nautical mi. • Ground speed - 150 knots
• All external annunciators (if installed) - on
The instrument panel self-test pageindicates the currently selected OBS course,
fuel capacity (CAP), fuel on board (FOB) and fuel flow (FF). The fuel capacity, fuel on
board and fuel flow may be manually entered if your installation does not include con-
nection to sensors which automatically provide these figures.To enter fuel capacity, fuel on board or fuel flow figures (if not provided by sensors):
1. Rotate the large right knob (
) to select the “CAP”, “FOB” or “FF” field.
2. Rotate the small (
) and large (
) right knobs to enter the desired figure, then
Fuel Figures: May be
entered manually if
no sensor present
Select to display
RMI and other
to verify these
Should match current OBS
Select to Set Fuel
Level to Full Capacity
Enter the fuel capacity, fuel on board or fuel
flow figures directly onto the appropriate field
of the instrument panel self-test page. These
figures will automatically be provided if your
installation includes connection to external
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The instrument panel self-test pageincludes selections to set fuel on board
(FOB) to full capacity and access the checklists page. This allows you to quickly set
fuel to full limits and display any checklists you’ve entered, such as start up or take-
off checklists.To set fuel on board to full (if not provided by sensor):
1. Rotate the large right knob (
) to highlight “Set Full Fuel?”.
and verify that fuel on board (“FOB”) now matches the fuel capacity (CAP)
figure. Fuel on board will now be reduced, over time, based on the fuel flow (FF) figure.
To view the checklists page:
1. Rotate the large right knob (
) to highlight “Go To Chklist?” and press
2. Rotate the large (
) right knob to select the desired checklist, then follow the steps on
page 147 to execute each step in the selected checklist.
3. Once you complete the desired checklist(s), press the small right knob (
) to return to
the checklists page. Press the small right knob (
) again to return to normal operation
on the satellite status or map pages.
Once you’ve verified instrument operation with the instrument panel self-test
page displayed, press the
The satellite status pagewill appear as the GNS 430 begins to collect satellite
information. An ‘Acquiring’ status will be displayed on the satellite status page, and
the signal strength of any satellites received will appear as “bar graph” readings.
This is a good indication that you are receiving signals and a position fix will be
determined. Following the first-time use of your GNS 430, the time required for a
position fix will vary—usually from one to two minutes.
Select “Set Full Fuel?” to set fuel on board
(FOB) to full capacity.Select “Go To Chklist?” to display the check-
list page and any available checklists. The
GNS 430 can hold up to nine checklists with
up to 30 entries in each checklist.
Fuel On Board
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If the unit can only obtain enough satellites for 2D navigation (no altitude), the
unit will use the altitude provided by your altitude encoder (if one is connected).
If the GNS 430 has not been operated for a period of six months or more, it may
have to ‘Search the Sky’ to collect new data. This means the unit is acquiring satel-
lite data to establish almanac and satellite orbit information, which can take 5 to 10
minutes. The satellite status pagewill display a ‘Search Sky’ status, and the
message annunciator (MSG), above the
key, will also flash to alert you of a
system message, ‘Searching the Sky’.
To view a system message, press
The message pagewill appear and display the status or warning information
applicable to the receiver’s current operating condition.To return to the previous page after viewing a message, press
The satellite status page shows the ID num-
bers for the satellites and the relative signal
strength of each satellite received (as a “bar
‘Search Sky’ indicates that satellite almanac
data is not available or has expired (if the
unit hasn’t been used for six months or more).
The data will be recollected from the first
The ‘INTEG’ annunciator (bottom left corner
of the screen) indicates that satellite coverage
is insufficient to pass built-in integrity moni-
toring tests. In the example above, not enough
satellites are being received to determine a
TAKEOFF TOURAcquiring Satellites &
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