6-16
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Proc
6.9
Radius-to-Fix (RF) Approaches
RF legs associated with RNAV RNP 1.0 non-AR (Approval Required)
approaches are supported by the GTN in v6.00, or later, when approved by the
installation.
• AC 90-101A defines RF leg as “a constant radius circular path, around a
defined turn center, that starts and terminates at a fix. An RF leg may be
published as part of a procedure.”
• Flying the RF leg of an approach is similar to flying a DME arc approach.
All GTN annunciations and indications are identical whether flying DME
arcs or RF legs with the GTN.
• RF legs may have a larger or smaller radius than DME arcs.
• Unlike DME arcs, RF legs are not based on a VOR.
• Refer to the aircraft AFMS for specific details regarding RF legs for a
specific aircraft.
6.10
Vectors to Final
With “Vectors-To-Final” (VTF) selected, the CDI needle remains off center
until you’re established on the final approach course. With the approach
activated, the Map page displays an extension of the final approach course in
magenta (remember, magenta is used to depict the active leg of the flight plan)
and “vtf” appears as part of the active leg on the Map page (as a reminder that
the approach was activated with vectors-to-final).
NOTE:
In software v5.13 and earlier, once VTF is activated all waypoints in
the approach prior to the FAF are removed.
NOTE:
In software v6.00 and later, all waypoints along the final approach
course, including waypoints before the FAF, are included in the flight plan and
the final approach course to the FAF is activated.
Summary of Contents for GTN 625
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