Terrain Alert Summary - Garmin GNS 530 Pilot's Manual & Reference

Table 12-2 shows the possible TERRAIN alert types with corresponding annunciations.
TERRAIN Failure
TERRAIN Inhibited
TERRAIN Not Available
Required Terrain Clearance (RTC) Advisory
Required Terrain Clearance (RTC) Caution
Imminent Terrain Impact (ITI) Advisory
Imminent Terrain Impact (ITI) Caution
Required Obstacle Clearance (ROC) Advisory
Required Obstacle Clearance (ROC) Caution
Imminent Obstacle Impact (IOI) Advisory
Imminent Obstacle Impact (IOI) Caution
Premature Descent Alert (PDA) Advisory
190-00181-00 Rev. H
Alert Type
Table 12-2 TERRAIN Alert Summary
GNS 530(A) Pilot's Guide and Reference
Annunciation Pop-Up Alert
(FLASHING)
(FLASHING)
(FLASHING)
(FLASHING)
(FLASHING)
(FLASHING)
(FLASHING)
(FLASHING)
SECTION 12
TERRAIN
None
None
None
12-5