GPS 400 Pilot’s Guide and Reference190-00140-60 Rev. E 10-1SECTION 10ADDITIONAL FEATURESSECTION 10: ADDITIONALFEATURESCAUTION: The Weather Data Link and TISinformation contained in this section is notintended to replace the documentation that issupplied with the GDL 49, the GDL 69(A) DataLink, and the GTX 330 Transponder.CAUTION: TIS is not intended to be used as acollision avoidance system and does not relievepilot responsibility to ‘see and avoid’ otheraircraft. TIS should not be used for avoidancemaneuvers during Instrument MeteorologicalConditions (IMC) or other times when there isno visual contact with the intruder aircraft. TISis intended only to assist in visual acquisitionof other aircraft in Visual MeteorologicalConditions (VMC). Avoidance maneuvers arenot recommended, nor authorized, as a directresult of a TIS intruder display or TIS alert.NOTE: Garmin is not responsible for Mode Sgeographical coverage. Operation of the groundstations is the responsibility of the FAA. Referto the Aeronautical Information Manual for aTerminal Mode S Radar Site Map covering theU.S.NOTE: This Section assumes the user hasexperience operating the GPS 400 unit and theGarmin GTX 330 Transponder.NOTE: TIS and Weather Data Link displays areavailable only when GPS 400 units are configuredwith the GTX 330 Mode S Transponder and a GDL49 or GDL 69(A) Data Link Satellite Receiver.10.1 TRAFFIC INFORMATION SERVICE (TIS)This section is written for:• Garmin GPS 400 Main System Software Version5.01 and later• GTX 330/330D Main Software Version 4.01 andlaterSome differences in operation may be observed whencomparing the information in this manual to earlier orlater software versions.NOTE: This section is written exclusively forGPS 400 units that are configured with the GTX330 Mode S Transponder. Refer to the 400/500Series Display Interfaces Pilot’s Guide Addendum(190-00140-10) when interfacing with non-Garmin products.TIS OperationTraffic Information Service (TIS) provides a graphicdisplay of traffic advisory information in the cockpitfor non-TCAS equipped aircraft. TIS is a ground-basedservice providing relative location of aircraft tracked byATC radar within a specified service volume. The TISground sensor uses real-time track reports to generatetraffic notification. TIS Traffic display is available toaircraft equipped with a Mode S Data Link, such as theGarmin GTX 330 Transponder. TIS traffic informationfrom a GTX 330 Transponder can then be displayed on aGPS 400 unit. Surveillance data includes aircraft trackedby ATC radar within the coverage volume. Aircraft withoutan operating transponder are invisible to TIS.