6-2
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Proc
6.1 Basic
Approach Operations
The GTN 6XX provides lateral and, when appropriate, vertical guidance for
visual and GPS/RNAV approaches. The moving map pages can also be used as
an aid to situational awareness for ILS, VOR, and NDB approaches (and non-
precision localizer-based approaches), but the appropriate radio navigational aid
MUST be used for primary approach course guidance for non-GPS approaches.
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,
etc.) more accurately using GPS.
Many overlay approaches are more complex (in comparison to GPS-only
approaches). The GTN 6XX 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.
Phase of flight annunciations are provided on the bottom of the display
indicating the current mode of flight.
Procedures are arranged around the existing flight plan in the following
order: Departure, En Route, Arrival, and Approach. For example, Departure
waypoints are inserted before the En Route waypoints in the flight plan and
Arrival waypoints are inserted between the En Route waypoints and the
approach waypoints. Always verify that the transition waypoints between each
phase are correct.
Approach
Airport
Approach
Transition
Channel/ID
Preview
Load Approach
Activate Approach
Arrival
Airport
Arrival
Transition
Runway
Preview
Load Arrival
Departure
Airport
Departure
Runway
Transition
Preview
Load Departure
Summary of Contents for GTN 625
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