Garmin GPS 400W Pilot's Manual & Reference page 121

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
frequency field.
• When flying a localizer-based approach
(other than backcourse) with automatic CDI
switching enabled:
1. "GPS" gudance may be used whle flyng
outbound and on the ntal porton of the
procedure turn.
2. "VLOC" gudance s used on the remander of
the approach from the tme you turn nbound
on the procedure turn.
3. The localzer frequency must be actve to use
"VLOC" gudance at the MAP. Press the CDI
key to swtch back to GPS data when the
mssed approach s ntated.
• When flying a localizer-based approach with auto-
matic CDI switching disabled:
1. You may select "VLOC" gudance at any pont
on the approach pror to reachng the FAF.
2. The localzer frequency must be actve to use
"VLOC" gudance.
190-00356-00 Rev B
5 - PROCEDURES
Enabling Autopilot Outputs
111