Garmin GNS 430 Pilot's Manual & Reference page 99

Points to Remember for ALL Approaches
• The GNS 430 is designed to complement your printed approach plates and vastly
improve situational awareness throughout the approach. However, you must always
fl y an approach as it appears on the approach plate.
• The active leg (or the portion of the approach currently in use) is depicted in
magenta on the Map Page. As you fl y the approach, the GNS 430 will automati-
cally sequence through each leg of the approach unless "SUSP" appears above the
OBS key. "SUSP" indicates that automatic sequencing of approach waypoints is
suspended on the current leg and normally appears at holding patterns and upon
crossing the missed approach point (MAP).
Points to Remember for Localizer-based Approaches
• The default factory setting will allow the CDI output to automatically switch
from the GPS receiver to the VLOC receiver. If the "ILS CDI Capture" setting
is changed to "Manual", you must determine when to select "GPS" or "VLOC"
guidance during the approach. Remember, "VLOC" is required for the fi nal course
segment from fi nal approach fi x (FAF) to MAP.
• If the CDI output has not automatically switched from GPS to ILS by 2.0 nautical
miles prior to the FAF, you must manually switch to the VLOC receiver by pressing
C . Verify that "VLOC" is displayed directly above the C key.
• Automatic switching of CDI output is available for ILS, localizer, SDF and LDA
approaches. Automatic CDI switching is not available for backcourse approaches.
• When fl ying an approach with the autopilot coupled, you must monitor system func-
tions at all times and verify that the autopilot and external CDI (or HSI) switches to
the VLOC receiver with suffi cient time to capture and track the approach course.
Switching to "VLOC" late in the approach may not provide the autopilot enough
time to respond and intercept the approach course prior to the FAF (depending
upon the performance characteristics of your autopilot and aircraft). In such cases,
you should manually fl y the approach or refer to the documentation provided with
your autopilot.
PROCEDURES
Additional Approach
Information
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