Garmin GNS 430 Pilot's Manual & Reference page 194

APPENDIX
TROUBLE-
D
SHOOTING
Why won't my unit automatically sequence to the next waypoint?
The GNS 430 will only sequence fl ight plan waypoints when automatic sequencing is enabled (i.e., no "OBS" or "SUSP" annunciation directly above
the O key). For automatic sequencing to occur, you must also cross the "bisector" of the turn you are navigating. The bisector is a perpendicular line
between two fl ight plan legs which crosses through the waypoint common to both legs.
How do I skip a waypoint in an approach, departure or arrival?
The GNS 430 allows you to manually select any approach, departure or arrival leg as the active leg of
your fl ight plan. This procedure is performed from the active fl ight plan page by highlighting the desired
waypoint and pressing D twice, then E to approve the selection (see illustration right). The GPS will
then provide navigation along the selected fl ight plan leg, so be sure you have clearance to that position.
See page 65 for more information.
How do I fly the GPS with an autopilot and DG heading bug?
If you do not have an HSI, you should make your course selections on the external CDI's OBS knob and the DG heading bug.
When does turn anticipation begin, and what bank angle is expected?
The GNS 430 will smooth adjacent leg transitions based upon a nominal 15º bank angle (with the ability to roll up to 25º) and provide three pilot
cues for turn anticipation: 1) A waypoint alert ("NEXT DTK ###°") will fl ash in the lower right corner of the screen 10 seconds before the turn point.
2) A fl ashing turn advisory ("TURN TO ###°") will appear in the lower right corner of the screen when you are to begin the turn. Set the HSI to the
next DTK value and begin the turn. 3) The To/From indicator on the HSI (or CDI) will fl ip momentarily to indicate that you have crossed the midpoint
of the turn. For more information on waypoint alerts and turn advisories, see section 5.
186
When should I use the O key to return
to auto sequencing, and what happens
when I do?
The most common application for using the O
key is the missed approach. The GNS 430 will suspend
automatic waypoint sequencing (indicated by a "SUSP"
annunciation directly above the O key; see right)
when you cross the missed approach point (MAP). This
prevents the GNS 430 from automatically sequencing to the missed approach holding point (MAHP).
If a missed approach is required, press the O key to return to automatic waypoint sequencing and
sequence the approach to the MAHP. See page 72 for more information on missed approaches.