Garmin G1000 Pilot's Manual page 302

HAZARD AVOIDANCE
Table 6-10 shows system status annunciations that may also be issued:
Alert Type
TAWS System Test Fail
TAWS Alerting is disabled
No GPS position or excessively degraded
GPS signal
System Test in progress
System Test pass
FORWARD LOOKING TERRAIN AVOIDANCE
The Forward Looking Terrain Avoidance (FLTA) alert is used by TAWS and is composed of:
• R R
EDUCED EQUIRED
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 Table 6-11. When an RTC alert is issued, a potential impact point is displayed on the TAWS
Page.
• I T
MMINENT ERRAIN
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 6-11.
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 below 125 feet AGL while within 1.0
nm of the runway threshold.
6-50
PFD/MFD TAWS
Page
Annunciation
None
Table 6-10 Additional System Annunciations
T C
ERRAIN LEARANCE AND
I I
MPACT AND MMINENT
Phase of Flight Minimum Clearance
Altitude Level Flight (ft)
Enroute
Terminal
Approach
Departure
Table 6-11 Minimum Terrain and Obstacle Clearance Values for FLTA Alerts
Garmin G1000 Pilot's Guide for Cessna Nav III
MFD
Pop-Up Alert
None
None
None
None
None
R R O
EDUCED EQUIRED
O I
BSTACLE MPACT
Minimum Clearance
Altitude Descending (ft)
700
350
150
100
Aural Message
"TAWS System Failure"
None
"TAWS Not Available"
"TAWS Available" is generated when sufficient
GPS signal is re-established.
None
"TAWS System Test OK"
C
BSTACLE LEARANCE
500
300
100
100
190-00498-01 Rev. A