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Approach Transition
Approach Transition operations occur after you enable
approach operation. The APPRCH annunciator will
turn on. The CDI sensitivity will gradually scale from
5.0 to 1.0 nm full scale per side automatically. The IAF
is usually in the Approach Transition operation area.
The ACTIVE annunciator will start flashing when you
are within 3 nm inbound to the FAF and not on hold
(sequencing suspended). When you are 2 nm from the
FAF, CDI sensitivity will gradually scale from 1.0 to
0.3 nm full scale per side automatically.
Approach Active
Approach Active operation begins when you cross the
FAF and ends when you cross the MAP. The CDI is at 0.3
nm full scale per side. The OBS/HOLD Annunciator is
on steady. The ACTIVE annunciator is on steady. If the
ACTIVE annunciator is not on steady, do NOT continue
the approach.
Approach Transition
Approach Transition operation begins again when
you cross the MAP. Decide whether you are going to
land or perform a missed approach. If you are
performing a missed approach procedure, press the
OBS/HOLD annunciator to enable waypoint
sequencing. The CDI will scale back to 1.0 nm.
Waypoint Arrival Alert
A standard Waypoint Arrival Alert message is
generated when you reach each approach waypoint.
Press the
MSG button to view and acknowledge the
message. Press
MSG again to return to the previous
display. The Waypoint Alert indicates that you are
close (approximately 1 nm for every 100 nm/h or
about 36 seconds) to the destination waypoint.
9-2
Approach Basics (GX50/60)