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Garmin GTX 33/GTX33 'ES' Remote Transponder

Garmin GTN 750 Nav/Com/GPS


Part Number:



Premier Avionics is an Garmin GTN650 and G600 Demo Dealer

  • Overview
  • Specifications
  • In the Box
  • Versions
  • GTX33 Video

See the same radar traffic your ATC controller is watching — with the GTX 33 remote-mounted Mode S digital transponder. This IFR-certified unit features traffic datalink capability and also meets the European mandate for Mode S level 2 surveillance. The GTX 33 is an all solid-state design, which makes for lower power consumption and reduced heat emissions. The transmitter delivers up to 250 watts of nominal power output. And other highlights include remote ident and auto standby, a Traffic Information Services (TIS-A) interface, plus altitude monitor with voice alerts.

Leading the Way with ADS-B

With available ES, or Extended Squitter, versions of the GTX 33, we have taken the lead in providing an affordable pathway to ADS-B compliance for the Next Generation airspace system. Using precise GPS-referenced positioning information, the extended squitter technology enables transponders to automatically transmit more accurate, and more useful, traffic surveillance data — including aircraft flight ID, position, altitude, velocity, climb/descent, and heading information. (Compared to traditional Mode S and Mode C transponders, which can only broadcast altitude, and thus require ground-based radar to correlate and identify the aircraft’s position.)

Enhanced Traffic Surveillance

Certified to TSO-C166b, expected Q4 2012, standards for 1090 MHz extended squitter transmission, the GTX 33 ES improves upon the existing transponder query system while working seamlessly with existing ATC protocols. The ADS-B reports provide ground controllers with considerably faster updates than traditional radar. And by simultaneously broadcasting this information to TAS or TCAS equipped aircraft, it enables them to essentially see the same traffic picture for their location that ATC is watching on the ground. Thus, with everyone in the ADS-B loop watching and reacting to the same flight trajectories, safe separation is far easier to maintain.

Squawk the Code of Quality

All the features of the standard GTX 33 transponder are retained in the ES version. Plus, there’s also an antenna diversity option, available with GTX 33D versions, which provides for improved air-to-air surveillance of TCAS-equipped aircraft flying above you. The traffic data enabled by the remote GTX 33 system can be displayed graphically on Garmin’s integrated GPS/Comm/Nav systems that provide built-in transponder code selection.

GTX 33: A whole new standard in transponder utility.

Physical and Performance:
Unit dimensions, WxHxD: 6.92"W x 1.78"H x 11.05"D (17.6 x 4.5 x 28.1 cm)
Weight: 4.31 lb (1.95 kg)
Display type: digital
Voltage range: 11-33
Transmit power: 250 watts nominal
Transponder type: mode A/C and S
Squawk code selection: remote entry through CNX 80, GNS 480 or G1000
Features and Benefits:
Solid state transmitter (more efficient, longer life): yes
Verbal alerts: yes
Traffic Information Services (TIS) alerts compatible: yes
Outside air temperature display: no
Pressure altitude readout: no
Altitude monitor function: no
Density altitude readout: no
Built-in timers: no
Automatic ALT/GND mode: yes
Diversity (supports top and bottom mounted antennae to enhance visibility to TCAS-equipped aircraft flying above you): no
Panel-mounted: no

What's in the Box:

  • GTX 33 transponder
  • Installation kit
  • Pilot's guide

Package contents may vary per version. See Premier Avionics for more information.

Part Number
GTX 33 System remote mount with installation kit and pilot
GTX33 w/ ES System remote mount with installation kit and pilot's guide
GTX 33D System remote mount w/diversity and installation kit and pilot's guide
GTX 33D w/ES System remote mount with installation kit and pilot's guide

Watch the Garmin Audio Panel and Transponder Video to see what it can do for you!