Garmin GNS 530AW Pilot's Manual & Reference page 129

• When flying an approach with the autopilot-coupled,
you must monitor system functions at all times and
verify that the autopilot and external CDI (or HSI)
switch to the VLOC receiver with sufficient time to
capture and track the approach course. Switching
to "VLOC" late in the approach may not provide the
autopilot enough time to respond and intercept the
approach course prior to the FAF (depending upon
the performance characteristics of your autopilot and
aircraft). In such instances, you should manually fly
the approach or refer to the documentation provided
with your autopilot.
• When an ILS or VOR approach is first selected or
executed, the frequency is automatically checked.
If the frequency is correct, you will not receive a
message regarding the frequency. If the frequency is
incorrect, you will receive a message and you must
place the ILS or VLOC frequency in the active fre-
quency field.
When an ILS approach is first selected, the ILS frequency is au-
tomatically placed in the standby VLOC frequency field. Press
the VLOC flip-flop key to use this frequency.
• When flying a localizer-based approach
(other than backcourse) with automatic CDI
switching enabled:
1. "GPS" guidance may be used while flying
outbound and on the initial portion of the
procedure turn.
2. "VLOC" guidance is used on the remainder of
the approach from the time you turn inbound
on the procedure turn.
3. The localizer frequency must be active to use
"VLOC" guidance at the MAP. Press the CDI
key to switch back to GPS data when the missed
approach is initiated.
• When flying a localizer-based approach with auto-
matic CDI switching disabled:
"VLOC" must appear in the lower left corner
(above the CDI key) in order to use the
VLOC receiver with your external CDI and
1. You may select "VLOC" guidance at any point
on the approach prior to reaching the FAF.
2. The localizer frequency must be active to use
"VLOC" guidance.
190-00357-00 Rev G
5 - PROCEDURES
Points to Remember
autopilot.
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