Garmin GNS 480, Pilot'S Manual

Page: 84 / 160

76
Basic Operation
Procedures
Steps for approach operations
• Edit mode
• Modify flight plan
• Review flight plan modifications
against published charts
• Execute the flight plan
Basic Approach Operations Examples
The GNS 480 provides precision and non-precision approach guidance using its built-in GPS receiver. The
moving map pages can also be used as a supplemental aid to situational awareness for ILS approaches (and
non-precision localizer-based approaches), but the localizer and glideslope receivers MUST be used for primary
approach course guidance. The GNS 480 also provides GPS precision approach capability, known as LPV ap-
proaches.
Approaches designed specifically for GPS are often very simple and don’t require overflying a VOR or NDB.
Currently, many non-precision approaches have “GPS overlays” to let you fly 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 worldwide.
Many overlay approaches are more complex (in comparison to GPS-only approaches). The GNS 480 displays
and guides you through each leg of the approach — automatically sequencing through each of these legs, up
to the missed approach point (MAP). Approaches may be flown “as published” with the full transition — using
any published feeder route or initial approach fix (IAF) — or may be flown with a vectors-to-final transition.
Approach operations on the GNS 480 typically begin with the same basic steps:
1. Select the destination airport using the Direct-To key (and DEST function), use an existing flight plan,
or use the Procedure Mode.
2. “Load” the approach (often while en route) in anticipation of its future use. This places the approach in
the “modified” flight plan, but retains course guidance from the active flight plan until the approach is
“Executed.”
3. “Execute” the full approach and vectors-to-final, if appropriate. In some scenarios, you may find it
more convenient to immediately execute the approach and fly direct to the Initial Approach Fix (IAF), if
cleared to do so. Verify the flight plan changes prior to executing the active flight plan.
NOTE : If you load an approach with a transition with a procedure turn and then subsequently
are vectored, selection of Vector To Final (VTF) mode removes the procedure turn and extends
the final approach course from the FAF.