Forward Looking Terrain Avoidance - Garmin G1000 Manual

TAWS/TERRAIN

Forward Looking Terrain Avoidance

The Forward Looking Terrain Avoidance alert (FLTA)
is used by TAWS and is composed of two sub-functions:
Reduced Required Terrain Clearance (RTC) Avoidance
— Provides alerts when the aircraft flight path is above
terrain, yet is projected to come within minimum clear-
ance values shown in Table 7.2.2. When an RTC alert is
issued, a potential impact point is displayed on the TAWS/
TERRAIN Proximity Page.
Imminent Terrain Impact (ITI) Avoidance — Provides
alerts when the aircraft is below the elevation of a terrain
cell in the aircraft' s projected path. ITI alerts are accompa-
nied by a potential impact point displayed on the TAWS/
TERRAIN Proximity Page. The alert is given when the
projected vertical flight path is calculated to come within
minimum clearance altitudes in Table 7.2.2.
During the final approach phase of flight, RTC/ITI alerts
are automatically inhibited when the aircraft is below 200'
AGL while within 0.5 nm of the approach runway or is
below 125' AGL while within 1 nm of the runway.
Phase Of Flight
Enroute
Terminal
Approach
Departure
Table 7.2.2 Minimum Terrain Clearance Values for RTC/ITI Alerts
7-38
190-00498-00_0A.indd 38
Level Flight Descending
700 ft. 500 ft.
350 ft. 300 ft.
150 ft. 100 ft.
100 ft. 100 ft.
Garmin G1000 Hazard Avoidance Pilot's Guide for the Cessna Citation Mustang
RTC/ITI Severity Levels
CAUTION: Estimated potential impact in
approximately 60 seconds after pop-up alert and
annunciation. For TAWS, RTC/ITI caution alerts
are accompanied by the aural message "Cau-
tion Terrain; Caution Terrain" OR "Terrain
Ahead; Terrain Ahead".
WARNING: Estimated potential impact in
approximately 30 seconds after pop-up alert and
annunciation. For TAWS, RTC/ITI warning alerts
are accompanied by the aural message "Terrain,
Terrain; Pull Up, Pull Up" OR "Terrain Ahead,
Pull Up; Terrain Ahead, Pull Up".
190-00498-00 Draft
3/1/2005 10:33:52 AM