Garmin GNS 400W GPS Receiver User Manual


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5 - PROCEDURES
107
190-00357-00 Rev E
ILS Approach
GNS 530W only
Once cleared to the next leg, press OBS. An
alert appears indicating the desired track and
the unit sequences to the next waypoint.
ILS Approaches
Precision ILS approaches can be performed with
theGNS530W’sbuilt-inVLOC(VOR/localizer/
glideslope) receivers. The GPS receiver can be used for
guidance prior to reaching the final approach fix, but
once there, the proper frequency must be selected on
theVLOCwindow(leftsideofscreen)andtheCDI
outputsetto“VLOC”.
The GNS 530W can use its internal GPS
receiver to guide you on the initial portion
of an ILS approach. At this stage “GPS” is
indicated above the CDI key.
NOTE: GPS level of service annunciations (LPV, ENR,
etc.) are not applicable to the external CDI (or HSI)
when VLOC is active.
2
NM
15
NM
1.2
NM
1.2
NM
MANUAL
FAF
VLOC
VLOC
GPS
GPS
Auto Switch to VLOC
within this area
The GNS 530W can be set to automatically switch
theexternalCDIoutputfromGPStoVLOCasyou
intercept the final approach course (if used with a
KAP140/KFC225 autopilot, you will need to manually
enable outputs). See instructions at the end of this sec-
tion. When the ILS approach is activated (and the cor-
rectILSfrequencyisactiveintheVLOCwindow),the
GNS 530W automatically switches within 1.2 NM left
or right of the final approach course. This switch can
take place anywhere from 2.0 to 15.0 NM from the FAF.
The illustration above shows both multiple loca-
tionsalongtheapproachpathandtheCDIselection
thatyoucanexpect:GPSorVLOC.Withinthearea
of the shaded box, the automatic switch from GPS to
VLOCshouldoccur.
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