Garmin GNS 430 Pilot's Manual & Reference page 36

NAV PAGES
2
Default NAV Page
The following symbols are used—on the default
NAV page directly below the CDI—to depict
the "active leg" of a flight plan or direct-to:
Direct-To a Waypoint
Course to a Waypoint, or Desired
Course between Two Waypoints
Left Procedure Turn
Right Procedure Turn
Vectors-To-Final
DME Arc to the left
DME Arc to the right
Left-hand Holding Pattern
Right-hand Holding Pattern
28
Default NAV Page
Active Leg of
Flight Plan
The fi rst NAV page is the default NAV page. This page may be quickly selected from
ANY page by using the c key.
To select the NAV group and display the default NAV page, press and hold c .
The default NAV page displays a graphic course deviation indicator (CDI) across the
top of the page. Unlike the angular limits used on a mechanical CDI coupled to a VOR or
ILS receiver, full scale limits for this CDI are defi ned by a GPS-derived distance (0.3, 1.0
or 5.0 nm), as indicated at both ends of the CDI. By default, the CDI scale will automati-
cally adjust to the desired limits based upon the current phase of fl ight: en route, terminal
area or approach. You may also manually select the desired scale setting as outlined on
pages 153 and 155.
The graphic CDI shows your position at the center of the indicator, relative to the
desired course (the moving course deviation needle). As with a traditional mechanical
CDI, when you're off course simply steer toward the needle. The TO/FROM arrow in the
center of the scale indicates whether you are heading to (an up arrow) the waypoint or if
you have passed the waypoint (a down arrow).
The GNS 430 always navigates TO a waypoint unless the OBS
switch is set (preventing automatic waypoint sequencing), or
you have passed the last waypoint in your flight plan.
Course Deviation Indicator (CDI)
User-
selectable
Data Fields
First Page
in NAV group