Garmin Flight Deck 100 Marine Instruments User Manual


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190-00728-04 Rev. A
Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
409
HAZARD AVOIDANCE
Figure 6-106 TAWS-A Page Menu
TAWS-A ABNORMAL OPERATIONS
TAWS-Acontinuallymonitorsseveralsystem-criticalitemssuchasdatabasevalidity,apandlandinggear
position,radaraltimeterinput,andGPSstatus.
IfnoGDUcontainsTerrain,AirportTerrain,andObstacledatabases(orthedatabasesareinvalid),theaural
message “TAWS System Failure”isgeneratedalongwiththe‘TAWSFAIL’alertannunciation.
TAWS-Arequiresa3-DGPSnavigationsolutionalongwithspecicverticalaccuracyminimums.Shouldthe
navigation solution become degraded or if the aircraft is out of the database coverage area, the annunciation
‘TAWSN/A’isgeneratedintheannunciationwindowandontheTAWS-APage.Theauralmessage“TAWS
Not Available”isalsogeneratedifairborne,andsomeTAWS-Aterrainalertswillnotbeissued(Table6-12),
whileGPWSalerting(whicharenotdependentonGPSposition)willcontinuetooperate.When theGPS
signalisrestoredandtheaircraftiswithinthedatabasecoveragearea,theauralmessage“TAWSAvailable”is
generated.
TAWS-Aalsorequiresradaraltimeterinput.Shouldtheradaraltimeterinputfailorbecomedegraded,the
annunciation ‘GPWSFAIL’is generatedin the annunciationwindow and onthe TAWS-A Page. Theaural
message “GPWS System Failure”isalsogenerated.The‘GPWSFAIL’annunciationwillalsooccurifbothGPS
altitudeandbarometricaltitudeareunavailable.IfonlytheGPWSsystemhasfailed,GPWS-basedalertswill
notbeavailable(Table6-12),whileotherTAWS-Aalertingremainsunaffected.
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