User Guide

Garmin G1000 Pilot’s Guide for the Diamond DA40/40F
190-00592-02 Rev. A6-44
HAZARD AVOIDANCE
FORWARD LOOKING TERRAIN AVOIDANCE
The Forward Looking Terrain Avoidance (FLTA) alert is used by TAWS and is composed of:
• REDUCED REQUIRED TERRAIN CLEARANCE AND REDUCED REQUIRED OBSTACLE CLEARANCE
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 minimum clearance
values in Table 6-13. When an RTC alert is issued, a potential impact point is displayed on the TAWS
Page.
• IMMINENT TERRAIN IMPACT AND IMMINENT OBSTACLE IMPACT
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 Table 6-13.
Phase of Flight
Minimum Clearance
Altitude Level Flight (ft)
Minimum Clearance
Altitude Descending (ft)
Enroute 700 500
Terminal
350 300
Approach 150 100
Departure 100 100
Table 6-11 Minimum Terrain and Obstacle Clearance Values for FLTA Alerts
During the final approach phase of flight, FLTA alerts are automatically inhibited when the aircraft is
below 200 feet AGL while within 0.5 nm of the approach runway or is below 125 feet AGL while within
1.0 nm of the runway threshold.