Garmin GNC 420W Pilot's Manual Addendum

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Pilot's guide Activation Instructions

Contents

Garmin GNC 420W Pilot's Manual Addendum Manual pdf 45 page image

41Part Three: Section 3TAWS Alerts“Five-Hundred” Aural AlertThe purpose of the aural alert message “Five-Hun-dred” is to provide an advisory alert to the pilot thatthe aircraft is five-hundred feet above terrain. Whenthe aircraft descends within 500 feet of terrain, theaural message “Five-hundred” is generated. There areno display annunciations or pop-up alerts that accom-pany the aural message.TAWS Failure AlertTAWS continually monitors several system-criticalitems, such as database validity, hardware status, andGPS status. If the terrain/obstacle database is not avail-able, the aural message “TAWS System Failure” is issuedalong with the “TER FAIL” annunciation.TAWS Not Available AlertGarmin TAWS requires a 3-D GPS navigation solu-tion along with specific vertical accuracy minimums.Should the navigation solution become degraded, orif the aircraft is out of the database coverage area, theannunciation “TER N/A” is generated in the annuncia-tion window. When the GPS signal is re-establishedand the aircraft is within the database coverage area,the “TER N/A” annunciation is removed.TAWS Alert SummaryThe aural alert voice gender is configurable to beeither male or female. Also, there are different alerttext phrases available for several of the alerts, as shownbelow. See your Garmin installer for further informa-tion on configuring the alert system.