Forward Looking Terrain Avoidance - Garmin G500 Pilot's Manual

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4.3.5.3

Forward Looking Terrain Avoidance

Reduced Required Terrain Clearance (RTC) and Reduced Required Obstacle
Clearance (ROC) alerts are issued when the aircraft flight path is above terrain,
yet is projected to come within the minimum clearance values in the FLTA Alert
Minimum Terrain and Obstacle Clearance Values table. When an RTC alert and/
or a ROC is issued, a potential impact point is displayed on the TAWS Page.
Imminent Terrain Impact (ITI) and Imminent Obstacle Impact (IOI) alerts
are issued when the aircraft is below the elevation of a terrain or obstacle cell in
the aircraft' s projected path. ITI and IOI alerts are accompanied by a potential
impact point displayed on the TAWS Page. The alert is annunciated when the
projected vertical flight path is calculated to come within minimum clearance
altitudes in the following table.
Flight Phase
En Route
Terminal
Approach
Departure
Table 4-7 FLTA Alert Minimum Terrain and Obstacle Clearance Values
During final approach, FLTA alerts are automatically inhibited when the
aircraft is below 200 feet AGL while within 0.5 NM of the approach runway or
below 125 feet AGL while within 1.0 NM of the runway threshold.
4-20
Minimum Clearance Altitude (feet)
Level Flight
700
350
150
100
Garmin G500/G600 Pilot's Guide
Descending
500
300
100
100
190-00601-02 Rev. J