Garmin 496 Manuale Proprietario

TIS provides a graphic representation of traffic advisory information 

in the cockpit for non-TCAS equipped aircraft. TIS is a ground-

based service providing relative location of all ATCRBS (Air Traffic 

Control Radar Beacon System) Mode A and Mode C transponder-

equipped aircraft within a specified service volume. The TIS ground 

sensor uses real-time track reports to generate traffic notification. 

TIS Traffic is available to aircraft equipped with a Mode S Data 

Link such as the Garmin GTX 330 Transponder. TIS Traffic from 

a GTX 330 Transponder can then be shown on the GPSMAP 496. 

Surveillance data includes all transponder-equipped aircraft within 

the coverage volume. Aircraft without an operating transponder 

are invisible to TIS. TIS shows up to eight traffic targets within 

7 nautical miles horizontally from 3,000 feet below to 3,500 feet 

 for information on 

connecting your GPSMAP 496 to a GTX 330 Mode S transponder.

  NOTE: How TCAS differs from TIS—the main difference 

between TIS and TCAS is the source of surveillance data. TCAS 

uses an airborne interrogator with a half-second update rate, 

while TIS uses the terminal Mode S ground interrogator and its 

Data Link to provide about a five-second update rate. The range 

accuracy of TIS and TCAS is similar. 

7.0 nm

3,500 ft

3,000 ft

  WARNING: TIS is NOT intended to be used as a collision 

avoidance system and does not relieve the pilot responsibility 

to “see and avoid” other aircraft. TIS should not be used for 

avoidance maneuvers. TIS is intended only to assist in visual 

acquisition of other aircraft in VMC. Avoidance maneuvers are 

not recommended, nor authorized, as a direct result of a TIS 

alert. 

While TIS is a useful aid to visual traffic avoidance, it has some 

system limitations that must be fully understood to ensure proper 

use. Many of these limitations are inherent in secondary radar 

surveillance. In other words, the information provided by TIS 

will be no better than that provided to ATC.

GPSMAP 496 Owner’s Manual 

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TIS > 

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RAFFIC

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NFORMATION

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ERVICE