Garmin GDU™ 37X Pilot’s Guide190-01054-00 Rev. E 147Hazard Avoidance Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices IndexTRAFFIC INFORMATION SERVICE (TIS-A) (OPTIONAL)NOTE:Refer to Appendix D for general information regarding TIS-A.The GDU 37X supports TIS-A input from a Garmin Mode S transponder, such as theGTX 330.SYSTEM STATUSThe traffic system status is annunciated in the upper right corner of the Map Page.System Status Traffic IconOperatingNo Traffic Data AvailableTraffic ModesIf a Traffic Icon is not displayed, check the Map Page Range and/or the Traffic DisplayRange on the Map Setup Menu.TIS-A SYMBOLOGYTIS-A traffic is shown on the GDU 37X according to TCAS symbology, graphicallyshown on the Map Page, and in the Traffic Warning Window. The GDU 37X displaystargets within a 7.5 nm radius, from 3000 feet below to 3500 feet above the requestingaircraft. A Traffic Advisory (TA) symbol appears as a solid yellow circle. All other trafficwithin range is shown as a hollow white diamond. Altitude deviation from own aircraftaltitude is shown above the target symbol if traffic is above own aircraft altitude, andbelow the symbol if they are below own aircraft altitude. Altitude trend is shown as anup arrow (>+500 ft/min), down arrow (<-500 ft/min), or no symbol if less than 500 ft/min rate in either direction.
