Garmin aera 795/796 Pilot’s Guide190-01194-00 Rev. C 131Hazard Avoidance Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices IndexDirectional airborne Traffic Advisory (TA) with track vector. Points in thedirection of the aircraft track.Directional off-scale airborne Traffic Advisory (TA). Points in the direction ofthe aircraft track.*Ground traffic without directional information. Ground traffic is onlydisplayed when own aircraft is below 1,500 feet AGL or on the ground.*Directional surface traffic. Ground traffic is only displayed when ownaircraft is below 1,500 feet AGL or on the ground.*Non-directional non-aircraft ground traffic. Ground traffic is only displayedwhen own aircraft is below 1,500 feet AGL or on the ground.*Directional non-aircraft ground traffic. Ground traffic is only displayed whenown aircraft is below 1,500 feet AGL or on the ground.*Ground traffic is only displayed on the Map Page when the aircraft is on the ground or below 1,500 feetAGL. Ground traffic is always displayed on the dedicated traffic page.ADS-B Traffic SymbologytrAFFIc ADvISorIeS (tA)The GDL 39 automatically adjusts its Traffic Advisory (TA) sensitivity level to reducethe likelihood of nuisance TA alerts during various phases of flight. TAs are issued fortraffic when they are predicted to be within a specified volume of airspace around youraircraft in a specified amount of time. The protected volume and time interval variesbased on the current geodetic altitude and groundspeed. Thus, the protected volumeof airspace increases with altitude and ground speed. Refer to the following table fordetails.Altitude(Geodetic)Look AheadTime (sec.)VerticalSeparation (ft.)HorizontalSeparation (nm.)Below 5,000 30 +/-850 .355,000-10,000 40 +/-850 .5510,000-20,000 45 +/-850 .8020,000-42,000 48 +/-850 1.10Above 42,000 48 +/-1,200 1.10Traffic Advisories
