Garmin 500W Series, Pilot'S Manual & Reference

Page: 117 / 236

5 - PROCEDURES
107 190-00357-00 Rev G
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 ar
ea
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.