Garmin GDU™ 37X Pilot’s Guide 190-01054-00 Rev. E150Hazard AvoidanceOverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexTRAFFIC WARNING WINDOWWhen a traffic threat is imminent, the Traffic Warning Window is shown. The TrafficWarning Window shows a small pop-up thumbnail map in the lower left corner. TheRange Rings on the pop-up alert are spaced every whole mile/kilometer/nautical mile.Press the CLR Key to remove the Traffic Warning Window.TIS-A (Map Page)Traffic GroundTrackTraffic WarningWindowTraffic Rangeand AltitudeSeparation usingMap PointerRange RingsNOTE: The Traffic Warning Window is disabled when the aircraft ground speedis less than 30 knots or when on the approach leg of a route.TRAFFIC GROUND TRACKTraffic ground track is indicated on the GDU 37X screen by a “target track vector”,a short line shown in 45-degree increments, extending in the direction of targetmovement.