Garmin GNS 430 - Manual (Page 76)

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Basic Approach Operations
The GNS 430 provides non-precision approach guidance using its built-in GPS re-
ceiver. The GPS receiver can also be used as a supplemental aid for precision approaches,
but the localizer and glideslope receivers MUST be used for primary approach course
guidance.
Approaches designed specifi cally for GPS are often very simple and don’t require
overfl ying a VOR or NDB. Currently, many non-precision approaches have “GPS over-
lays” to let you fl y an existing procedure (VOR, VOR/DME, NDB, RNAV, etc.) more
accurately using GPS. To date, there are over 2,400 GPS-only approaches and over 2,900
GPS overlay approaches.
Many overlay approaches are complex (in comparison to GPS-only approaches). The
GNS 430 displays and guides you through each leg of the approach—automatically se-
quencing through each of these legs, up to the missed approach point (MAP). Approaches
may be fl own “as published” with the full transition — using any published feeder route
or initial approach fi x (IAF) — or may be fl own with a
vectors-to-fi nal transition.
Approach operations on the GNS 430 will typically begin with the same basic steps:
1. Select the destination airport using the D key, or as the last waypoint in the active flight plan.
2. Choose the “Select Approach?” option from the procedures page (see page 66) or from the active flight
plan options (see page 61).
3. “Load” the approach (often while enroute) in anticipation of its future use. This places the approach in the
active flight plan, but retains course guidance in the enroute section until the approach is “activated”.
4. “Activate” the full approach or vectors-to-final, as appropriate. In some scenarios, you may find it more
convenient to immediately activate the approach and skip the “Load” process outlined above in step #3.
The GNS 430 provides both options.
Select Destination
“Select” and “Load”
the approach
“Activate” the
approach
PROCEDURES
Basic Approach
Operations
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