Garmin GNS 530 - Manual (Page 107)

GNS 530(A) Pilot’s Guide and Reference 190-00181-00 Rev. H
SECTION 6
PROCEDURES
6-25
Figure 6-59 Waypoint Alert
4) When the OBS Key is pressed, the GNS 530
automatically sequences to each waypoint
along the remainder of the departure route,
including the selected transition.
6.3 ILS APPROACHES
Precision approaches can be performed with the GNS
530’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 530 can be set to automatically switch the
external CDI output from GPS to VLOC (Figure 6-60)
as the pilot intercepts the final approach course. When
the ILS approach is activated, the GNS 530 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.
Figure 6-60 GPS and VLOC Annunciations
Figure 6-61 shows multiple locations along the
approach path and the expected CDI selection: GPS or
VLOC. The automatic switch from GPS to VLOC should
occur within the area of the shaded box.
The automatic switch from GPS to VLOC occurs
gradually to prevent abrupt CDI changes when coupled
to an autopilot. The CDI selection can also be changed
manually by pressing the CDI Key. Once the switch
from GPS to VLOC has occurred, either automatically or
manually, it does not automatically switch again until the
approach is reactivated or another approach is selected.
To prevent automatic ILS CDI selection, choose the
‘Manual’ ILS CDI setting, as described in Section 10.4
‘CDI Scale/Alarms’. (The factory default setting is ‘Auto’,
which enables the automatic switch to VLOC.)