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GNS 430 Pilot’s Guide and Reference
10-20
SECTION 10 
AUX PAGES
10.4  SETUP 1 PAGE
The Setup 1 Page (Figure 10-51) provides access (via 
‘menu options’) to airspace alarms, CDI scale adjustment, 
an arrival alarm, units of measure settings, position formats, 
map datums, and settings for local or UTC time display.  
When a menu option is selected, the corresponding page 
appears providing access to the various unit settings.
To select a menu option from the Setup 1 
Page:
Figure 10-51  Setup 1 Page
Current Page Group 
Menu Options (to Select, Highlight 
with Cursor and Press the 
ENT Key)
Position of 
Current Page 
within Current 
Page Group
Number of Pages in 
Current Page Group
1)  Press  the  small  right  knob  momentarily,  to 
activate the flashing cursor (Figure 10-51).
2)  Turn the large right knob to select the desired 
menu option (Figure 10-52), and press the ENT 
Key (Figure 10-53).
Figure 10-52  ‘Units/Mag Var’ Highlighted
Figure 10-53  Units/Mag Var Page
The following menu options are available:
•  ‘Airspace Alarms’ - Allows the pilot to turn the 
controlled/special-use airspace message alerts on 
or off.  This does not affect the alerts listed on the 
Nearest Airspace Page or the airspace boundaries 
depicted on the Map Page.  It simply turns 
on/off the warning provided when the aircraft is 
approaching or near an airspace.
  An altitude buffer is also provided which ‘expands’ 
the vertical range above or below an airspace.  For 
example, if the buffer is set at 500 feet, and the aircraft 
is more than 500 feet above or below an airspace, 
the pilot is not notified with an alert message; if 
the aircraft is less than 500 feet above or below an 
airspace and projected to enter it, the pilot is notified 
with an alert message.  The default is 200 feet.
•  ‘CDI/Alarms’ - Allows the pilot to define the scale 
for the GNS 430’s on-screen course deviation 
indicator.  The scale values represent full scale 
deflection for the CDI to either side (Figure 
10-54).  The default setting is ‘Auto’.  At this 
setting, the CDI scale is set to 5 nm during the 
enroute/oceanic phase of flight.  Within 30 nm 
of the destination airport the CDI scale gradually 
ramps down to 1.0 nm (terminal area).  Likewise 
when leaving the departure airport the CDI scale 
is set to 1.0 nm and gradually ramps UP to 5 nm 
beyond 30 nm (from the departure airport).