127Basic OperationMessagesMessage DescriptionBaro Correction xx.yy CRSR to Change, ENTER toAcceptInput correct baro setting.WARNING Loss of Navigation Abort Approach Execute missed approach using other nav equipment.WARNING CO Level Alarm CO Guardian has issued this alarm.No valid OBS input detected. OBS course frozen Pilot awarenessApproach downgraded. Use LNAV minima. Pilot awarenessWARNING Loss of Navigation - Abort Approach The GNS 480 cannot be used for navigation. Abortthe approach and use other means of navigation untilnavigation with the GNS 480 is available.KEY INOP A key is inoperative. Contact customer service.Switching CDI to (ILS, LOC, or GPS) CDI autoswitching is taking place.Modified Flight Plan Has Not Been Executed Pilot awarenessCAUTION Traffic Source Data Failure Communication lost with data source.CAUTION Transponder Failure Traffic Failure Communication lost with GTX33/330. Configured forTIS.Non WGS-84 waypoint navigation Pilot awarenessCAUTION Fuel Data Communications Failure Communication lost with data source.Transponder is not transmitting ADS-B position Pilot awareness
