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2-19190-01102-02 Rev. B
Garmin G500 Pilot’s Guide
Foreword
Sec 1
System
Sec 2
PFD
Sec 3
MFD
Sec 4
Hazard
Avoidance
Sec 5
Additional
Features
Sec 6
Annun.
& Alerts
Sec 7
Symbols
Sec 8
Glossary Appendix A
Appendix B
Index
2.7.3 Vertical Deviation Indicator (VDI)
The Vertical Deviation (Glideslope) Indicator (VDI) appears to the left of
the VSI whenever an ILS frequency is tuned in the active NAV field. A green
diamond acts as the VDI Indicator, like a glideslope needle on a conventional
indicator. If a localizer frequency is tuned and there is no glideslope signal, “NO
GS” is annunciated. The glideslope on an ILS approach is only shown if the
current heading is within 90° of the selected course. This prevents the glideslope
from being displayed during localizer backcourse approaches.
Vertical Deviation Source
Vertical Deviation Indicator
Figure 2-29 Vertical Deviation Indicator (ILS Source)
The vertical deviation is similar to the glideslope for GPS approaches
supporting WAAS vertical guidance (LNAV+V, L/VNAV, LPV) and is generated
by the system to reduce pilot workload during approach. When an approach of
this type is loaded into the flight plan and GPS is the selected navigation source,
the Vertical Deviation Indicator appears as a magenta diamond. If the approach
type downgrades to LNAV past the final approach fix (FAF), or the approach
only supports LNAV service, “NO GP” is annunciated.
Vertical Deviation Source
Vertical Deviation Indicator
Figure 2-30 Vertical Deviation Indicator (GPS Source)