Garmin GTN 650 Pilot's Guide - Page 198

10.3.8.8 TAWS Not Available Alert Foreword TAWS requires a 3-D GPS position solution along with specific vertical Getting Started accuracy minimums. Should the position solution become degraded or if the aircraft is out of the database coverage area, the annunciation "TAWS N/A" is Xpdr Ctrl generated in the annunciation window and on the TAWS page. The aural message "TAWS Not Available" is generated. When the GPS signal is re-established and Com/Nav the aircraft is within the database coverage area, the aural message "TAWS Available" is generated (when the aircraft is airborne). FPL 10.3.8.9 TAWS Failure Alert Direct-To TAWS continually monitors several system-critical items such as database validity, hardware status, and GPS status. If the terrain/obstacle database is not Proc available, the aural message "TAWS System Failure" is generated along with a "TAWS FAIL" annunciation. Wpt Info 10.3.9 TAWS System Status Map During power-up, TAWS conducts a self-test of its aural and visual Traffic annunciations. The system test can also be manually initiated. An aural alert is issued at test completion. TAWS System Testing is disabled when ground speed Terrain exceeds 30 knots. Weather Nearest Music Utilities System Messages Symbols Alert Type TAWS Available TAWS System Test in Progress TAWS System Test Pass TAWS N/A TAWS Alerting is Disabled TAWS System Test Fail Alert Annunciation None Aural Message "TAWS Available" None None "TAWS System Test OK" TAWS Not Available None "TAWS System Failure" Table 10-5 TAWS-B System Test Status Annunciations Appendix Index 10-18 Garmin GTN 625/635/650 Pilot's Guide 190-01004-03 Rev. B