Garmin GTX 330 Manual

A SERVICE OF

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1

Part One: Section 1

Part One:

Trafﬁc Information Service

(TIS) Interface

Section 1: TIS Operation and

Symbology

TIS Operation

NOTE: Part One of this Addendum assumes the user

has experience operating the 400W/500W Series units

and the Garmin GTX 330 Transponder.

The Trafﬁc Information Service (TIS) provides

a graphic display of trafﬁc advisory information in

thecockpitfornon-TCAS(TrafcalertandCollision

Avoidance System) equipped aircraft. TIS is a ground-

basedserviceprovidingrelativelocationofallATCRBS

(AirTrafc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trafcnotication.

TIS Trafﬁc display is available to aircraft equipped

withaModeSDataLinksuchastheGarminGTX330

Transponder.TISTrafcfromaGTX330Transpon-

dercanthenbedisplayedonaGarmin400W/500W

Series unit. Surveillance data includes all transponder-

equipped aircraft within the coverage volume. Aircraft

without an operating transponder are invisible to TIS.

TIS displays up to eight trafﬁc targets within seven

nautical mileshorizontallyfrom3000feetbelowto

3500feetabovethe requesting aircraft.

The TIS is a ground-based service that displays

nearbyaircraftonyour400W/500W-seriesdisplay.

FortheTISfeaturetoinformyouofanearbyaircraft’s

presence, several conditions must be met:

 • YouraircraftmustbeequippedwithaModeS

datalinktransponder,suchastheGTX330.

 • YoumustbewithinrangeofaModeSradar

that provides the TIS service. Not all Mode S

ground radars provide TIS service.

 • The“intruder”aircraftmustbeequippedwith

a transponder, and that transponder must be

turned on. Aircraft that are not equipped with

operating transponders will not be visible to the

Mode S surveillance radar.

 • The“intruder”aircraftmustbewithintheTIS

coverage volume for your aircraft. TIS displays

up to eight trafﬁc targets within seven nautical

mileshorizontallyfromtherequestingaircraft,

andfrom3,000feetbelowto3,500feetabove

the requesting aircraft.

 • Bothyouraircraftandtheintruderaircraftmust

be visible to the Mode S surveillance radar on

the ground.

Always remember that TIS cannot alert you to

the presence of aircraft that are not equipped with

transponders, nor can it alert you to aircraft that may

be nearby, but obscured from the ground surveillance

radar by intervening terrain.

TIS Coverage Volume (not to scale)

7.0 nm

3,500 ft

3,000 ft

TIS Operation and Symbology

190-00356-30 Rev F