Garmin aera 660 aera 660 Pilot s Guide - Page 123

Overview Navigation Flight Planning Hazard Avoidance Additional Features Hazard Avoidance Traffic Advisories (TA) TAs are issued for traffic when they are predicted to be within a specified volume of airspace around the aircraft in a specified amount of time. The protected volume and time interval varies based on the current geodetic altitude and groundspeed. Thus, the protected volume of airspace increases with altitude and ground speed. Refer to the following table for details. Altitude (Geodetic) Below 5,000 5,000-10,000 10,000-20,000 20,000-42,000 Above 42,000 Look Ahead Time (sec.) 30 40 45 48 48 Vertical Separation (ft.) +/-850 +/-850 +/-850 +/-850 +/-1,200 Horizontal Separation (nm.) .35 .55 .80 1.10 1.10 Traffic Advisories TRAFFIC ALERTS (ADS-B TIS-B) A traffic audio alert is generated whenever the number of Traffic Advisories on the aera display increases. Limiting Traffic Advisories only reduces the "nuisance" alerting due to proximate aircraft. For example, when the first Traffic Advisories appear on the display, the user is alerted audibly. So long as a single aircraft remains on the display, no further audio alert is generated. If a second (or more) aircraft appears on the screen, a new audio alert is sounded. Traffic Advisories can only be issued when the weather/traffic device knows its own altitude and the altitude of the intruder aircraft. If the number of Traffic Advisories on the traffic display decreases and then increases, a new audio alert is sounded. The traffic audio alert is also generated whenever TIS-B service becomes available. The following traffic audio alerts are available: • "Traffic"-TIS-B/ADS-B traffic alert received. • "Traffic Not Available"-TIS-B/ADS-B service is not available or out of range. Appendices Index 190-02017-20 Rev. A Garmin aera 660 Pilot's Guide 107