4.1 OVERVIEW
The GNS 430’s direct-to function provides a quick method of setting a course to a destination waypoint. Once a direct-to is activated, the GNS 430 establishes a point-to-point course line (great circle) from the present position to the selected direct-to destination. Navigation data on the various NAV pages provides steering guidance until the direct-to is cancelled or replaced by a new destination.
To select a direct-to destination:
1) Press the Direct-to Key. The Select Direct-to Waypoint Page appears (Figure 4-1), with the waypoint identifier field highlighted.
Figure 4-1 Select Direct-to Waypoint Page
2) Use the small and large right knobs to enter the identifier of the desired destination waypoint (Figure 4-2).
Figure 4-2 Waypoint Identifier Field Selected
3) Press the ENT Key to confirm the selected waypoint, and press the ENT Key again to activate the direct-to function (Figure 4-3).
Figure 4-3 ‘Activate?’ Field Highlighted
When off course while navigating to a waypoint, the direct-to function may also be used to re-center the CDI (HSI) needle and proceed to the same waypoint.
To re-center the CDI (HSI) needle to the same destination waypoint:
Press the Direct-to Key, followed by the ENT Key twice.
NOTE: When navigating an approach with the missed approach point (MAP) as the current
Selecting a Destination by Facility Name or City
In addition to selecting a destination by identifier, the Select Direct-to Waypoint Page (Figure 4-4) also allows the pilot to select airports, VORs and NDBs by facility name or city location. If duplicate entries exist for the entered facility name or city, additional entries may be viewed by continuing to turn the small right knob during the selection process. See Section 7.1, Duplicate Waypoints for more information.
Identifier, Symbol,
and Region Facility Name
Flight Plan
Field Nearest Airport Field City
Figure 4-4 Select Direct-to Waypoint Page
To select a direct-to destination by facility name or city:
1) Press the Direct-to Key. The Select Direct-to Waypoint Page appears, with the waypoint identifier field highlighted.
2) Turn the large right knob to highlight the facility name (second line) or the city (third line) field.
3) Use the small and large right knobs to enter the facility name or city location of the desired destination waypoint (Figure 4-5). When spelling the facility name or city, the GNS 430’s Spell’N’Find™ feature selects the first entry in the database based upon the characters entered up to that point.
Figure 4-5 Facility Name Selected
4) Continue turning the small right knob to scroll through any additional database listings for the selected facility name or city. The pilot can also scroll backwards with the small right knob if the desired waypoint has been scrolled past . 5) Press the ENT Key to confirm the selected
waypoint, and press the ENT Key again to activate the direct-to function.
Selecting a Destination from the Active Flight Plan
When navigating an active flight plan, any waypoint contained in the flight plan may be selected as a direct-to destination from the Select Direct-to Waypoint Page. See Section 5, for more information on flight plans.
To select a direct-to destination from the active flight plan:
1) Press the Direct-to Key. The Select Direct-to Waypoint Page appears, with the waypoint identifier field highlighted.
2) Turn the large right knob to highlight the flight plan (FPL) field (Figure 4-6).
Figure 4-6 Highlighted Flight Plan Field
3) Turn the small right knob to display a window showing all waypoints in the active flight plan (Figure 4-7).
Figure 4-7 FPL (Flight Plan) Window
4) Continue turning the small right knob to scroll through the list and highlight the desired waypoint.
5) Press the ENT Key to confirm the selected waypoint, and press the ENT Key again to
Selecting the Nearest Airport as a Direct-to Destination
The Select Direct-to Waypoint Page always displays the nearest airports (from the present position) in the NRST field. Nearby airports may also be selected as direct-to destinations using the steps described in Section 8.1.
To select a nearby airport as a direct-to destination:
1) Press the Direct-to Key. The Select Direct-to Waypoint Page appears, with the waypoint identifier field highlighted.
2) Turn the large right knob to highlight the nearest airport (NRST) field.
3) Turn the small right knob to display a window showing up to nine nearby airports (Figure 4-8).
Figure 4-8 Nearest Window
4) Continue turning the small right knob to scroll through the list and highlight the desired airport.
5) Press the ENT Key to confirm the selected airport, and press the ENT Key again to activate the direct-to function.
Shortcuts
Shortcuts are available when using the Direct-to Key, allowing the pilot to bypass the use of the small and large right knobs to enter the destination waypoint’s identifier. A direct-to can be performed from any page displaying a single waypoint identifier (such as the WPT pages for airports and NAVAIDs). For pages that display a list of waypoints (e.g., the Nearest Airport Page), the desired waypoint must be highlighted with the cursor before pressing the Direct-to Key.
Selecting an on-screen waypoint as a direct-to destination:
1) If a single airport, NAVAID, or user waypoint is displayed on-screen (Figure 4-9):
Figure 4-9 Single Waypoint Displayed
a) Press the Direct-to Key b) Press the ENT Key twice.
2) If a list of waypoints is displayed on-screen: a) Press the small right knob to activate the cursor.
b) Turn the large right knob to highlight the desired waypoint (Figure 4-10).
Figure 4-10 Nearest List
c) Press the Direct-to Key followed by the ENT Key twice.
To select an on-screen waypoint as a direct- to destination:
1) If a single airport, NAVAID, or user waypoint is displayed on-screen: press the Direct-to Key, then press the ENT Key twice.
2) If a list of waypoints is displayed on-screen, press the small right knob to activate the cursor.
3) Turn the large right knob to highlight the desired waypoint.
4) Press the Direct-to Key followed by the ENT Key twice.
Selecting a Direct-to destination from the Map Page
Direct-to destinations may also be selected from the Map Page. If no airport, NAVAID, or user waypoint exists at the desired location, a waypoint named ‘+MAP’ is automatically created at the location of the panning pointer.
To select a direct-to destination from the Map Page:
1) From the Map Page, press the small right knob to display a panning pointer.
2) Turn the small and large right knobs to place the panning pointer at the desired destination location.
3) If the panning pointer is placed on an existing airport, NAVAID or user waypoint, the waypoint name is highlighted (Figure 4-11). Press the
Direct-to Key and the ENT Key twice to
navigate to the waypoint.
Figure 4-11 Panning Pointer Placed on Waypoint
4) If the panning pointer is placed on an open location, press the Direct-to Key, then press the ENT Key twice to create a ‘+MAP’ waypoint and navigate to it.
Cancelling Direct-to Navigation
Once a direct-to is activated, the GNS 430 provides navigation guidance to the selected destination until the direct-to is replaced with a new direct-to or flight plan, cancelled, or the unit is turned off.
To cancel a direct-to:
1) Press the Direct-to Key to display the Select Direct-to Waypoint Page.
2) Press the MENU Key to display the Direct-to Page Menu (Figure 4-12).
Figure 4-12 Select Direct-to Page Menu
3) With ‘Cancel Direct-to NAV?’ highlighted, press the ENT Key. If a flight plan is still active, the GNS 430 resumes navigating the flight plan along the closest leg.
Specifying a Course to a Waypoint
When performing a direct-to, the GNS 430 sets a direct great circle course to the selected destination. The course to the destination can also be manually defined using the ‘CRS’ course field on the Select Direct-to Waypoint Page.
To manually define the direct-to course:
1) Press the Direct-to Key.
2) Use the small and large right knobs to select the destination waypoint.
3) Press the ENT Key to confirm the selected waypoint, then turn the large right knob to highlight the course (‘CRS’) field (Figure 4-13).
Figure 4-13 CRS (Course) Field Highlighted
4) Turn the small and large right knobs to select the desired course (Figure 4-14) and press the
ENT Key.
Figure 4-14 Course Field Selected
5) Press the ENT Key again to begin navigation using the selected destination and course. 6) To re-select a direct course from present
position (or select a new manually-defined course), simply press the Direct-to Key, followed by the ENT Key twice.