190-02177-02 Rev. A
Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
327
HAZARD AVOIDANCE
FIVE-HUNDRED VOICE ALERT
The purpose of the TAWS-B
“Five-hundred”
voice alert is to provide an advisory alert of when the aircraft
descends to within 500 feet above the terrain or runway threshold. When the aircraft is within 5 nm of an
airport, the
“Five Hundred”
voice alert is based on the nearest runway threshold elevation. When the aircraft
is more than 5 nm of the nearest airport, the
“Five Hundred”
voice alert is based on the height above terrain
(as determined by the GPS altitude and Terrain Database).
There are no display annunciations or pop-up alerts that accompany the voice alert.
INHIBITING ALERTING
The pilot can manually inhibit FLTA alerts. If TAWS-B is installed, PDA alerts are also inhibited with FLTA
alerts.
TAWS-B System
Terrain-SVT System
Figure 6-73 Alerting is Inhibited when Annunciation is displayed
Inhibiting/enabling TAWS-B or Terrain-SVT Alerting:
1)
Select the terrain page.
2)
Press the
Inhibit
Softkey. Alerting is inhibited when softkey annunciator is green.
Or
:
a)
Press the
MENU
Key.
b)
Turn the
FMS
Knob to highlight the desired inhibit or enable option and press the
ENT
Key.
SYSTEM STATUS
TERRAIN-SVT
During initialization, Terrain-SVT conducts a self-test of its visual annunciations and voice alerts. An voice
alert is issued at test completion.
Terrain-SVT continually monitors several system-critical items such as database validity, hardware status,
and GPS status. If the terrain/obstacle database is not available, the system issues the voice alert
“Terrain
System Failure”
along with the ‘TER FAIL’ alert annunciation.
Terrain-SVT requires a 3-D GPS navigation solution along with specific vertical accuracy minimums.
Should the navigation solution become degraded or if the aircraft is out of the database coverage area, the
annunciation ‘TER N/A’ is generated in the annunciation window and on the ‘Map - Terrain-SVT’ Page. The
voice alert
“Terrain System Not Available”
is generated. When sufficient GPS signal is returns and the
aircraft is within the database coverage area, the voice alert
“Terrain System Available”
is generated.