Trig Avionics


TN72 GPS Receiver

TN72 – Affordable ADS-B

The TN72 GPS Position Source brings ADS-B Out capabilities to your Trig transponder. Light weight and easy to fit, the highly affordable TN72 uses certified technology making you visible to all ADS-B In traffic devices. Flying in busy skies with a TN72 will reduce your risk of collision and improve flight safety. Installing a TN72 and suitable GPS antenna is a small price to pay for enhanced visibility and peace of mind.

Installed with a Trig transponder the TN72 GPS is configured in one of the following ways;

TN72 X GPS – this version meets the position source requirements of FAR 91.227 U.S. light-sport, experimental and homebuilt pilots who fit a TN72 X can fly in 2020 ADS-B rule airspace.

TN72 TABS GPS – (Traffic Aircraft Beacon System) this is the FAA technical standard that enables voluntary equipage of  ADS-B Out. With its low power consumption and compact size the TN72 TABS GPS is the best way for experimental gliders (in the U.S.) to become ADS-B Out equipped.

In Europe and other countries, where the use of ADS-B equipage is voluntary then the TN72 TABS configuration is the best way to remain visible in VFR flight conditions.

  • Simple ADS-B Out upgrade for all Trig transponders
  • Suitable for experimental and light-sport pilots for 2020 compliance in U.S.
  • Safer – visible on all ADS-B In systems
  • Enables live tracking of aircraft (with suitable ADS-B In equipment)
  • Triggers traffic information services (TIS-B only available in U.S.)
  • Low cost and light weight
  • Two year world wide warranty

The TN72 supports current and future air to air collision avoidance and situational awareness applications. This enhanced visibility can be useful for tracking club aircraft in real time – improving safety in the circuit and reducing the risk of air-to-air collision.

Compatible products

The TA70 certified antenna is designed to compliment the TN72. In installations where a smaller antenna is required then suitable alternatives can be used, see our FAQ section.  In countries where ADS-B airspace is mandated, operation in ADS-B airspace by certified types usually requires full compliance with TSO-C145 GPS technology, our TN70.


Trig are leaders in ADS-B technology (Automatic Dependant Surveillance Broadcast) we were the first company in the world to meet FAA TSO-C166b, the latest standard for ADS-B transponders. Every Trig transponder is Mode S, but also ADS-B capable. Once installed ADS-B equipment transmits your aircraft’s precise location directly to other ADS-B equipped aircraft, improving your electronic visibility and safety. To learn more about ADS-B got to our Knowledge Bank article

Product Transponder Configuration ADS-B  Suitability Compliance Supply
Antenna Options
TN72 X  X (SIL 3)  U.S. – TN72 allows light-sport, home built and experimental aircraft to fly in 2020 rule airspace.  FAR 91.227 (GPS source) 11-33V Fit a TA70 or suitable alternative Light-sport bundle available includes TT22 XPD, TN72 and TA70 antenna
TN72 TABS TABS (SIL 1) Europe – ideal for voluntary VFR use

U.S. – suited for uncertified gliders. Part 23 a/c may use only in non 2020 rule airspace.

Australia / NZ  currently in gliders & balloons – subject to CASA review.

 TSO-C199 11-33V

Fit a TA70 or suitable alternative

Specification TN72 GPS Reciever
Certification TSO-C199 Class B
Compliance TSO-C199 Class B, DO-160G
Supply voltage (DC) 11 – 33 V
Typical consumption (at 14v) at 14V – 0.1A
Operating temperature -40°C to + 70°C
Cooling requirement no fan required
Weight 110 grams / 3.8 ounces
Connector GPS (power, ground and GPS data) – 9 way D type
Antenna – 5V phantom power – QMA male
Dimensions (mm) H 30 x L 90 x W 63mm (W with base flange 80mm)
Dimensions (inches) H 1.2” x L 3.6” x W 2.5” (W with base flange 3.2”)

What's in the box

  • All Trig products come with a two year warranty, starting from the day of installation
  • Installation manual and Operating manual
  • Installation kit
  • EASA Form One

Frequently Asked Questions

I fly in a certified aircraft in the US, can I use the TN72?
In you are in North America and you wish to fly in ADS-B 2020 rule airspace then you will require full ADS-B compliance. You can use a TN70 GPS Receiver, which is TSO-C145 compliant. If you already have a GNS or GTN WAAS Navigator you can use this as a GPS position source with a suitable Class 1 Trig transponder (TT31 or TT22).

Can the TN72 really help in collision avoidance?
Yes - The TN72 GPS was tested and evaluated as part of Project EVA, an European wide project EASA (SESAR) initiative to test ADS-B technology. Because the TN72 uses certified GPS technology it can be relied upon to provide dependable position reporting for collision avoidance. Unlike uncertified GPS units the TN72 will be visible to all ADS-B In equipped technology.

Can the TN72 be used in Europe?
Yes - EASA are keen to encourage pilots to equip with ADS-B equipment. The more pilots who equip with ADS-B Out equipment the greater the opportunity to reduce air to air collisions and improve safety.

Can I use a small puck antenna with the TN72?
Our TA70 antenna is recommended - it provides a highly reliable source for a good quality GPS signal. For alternative antennas our Installation Manual says;
"The TN72 is compatible with any GPS antenna approved to ETSO C 190 or C144a.
Where a non TSO antenna is used, the antenna must include;
- Gain of 20dB or more.
- Active 5 volt powered unit with less than 40mA current.
- Unrestricted view of the horizon.

Note - the antenna socket of the TN72 requires a QMA connector or use of a suitable adaptor.

Can I use an uncertified GPS antenna with the TN72
Yes - the TN72 is a certified product but it is permissible to use an uncertified antenna in combination with the TN72. Naturally the performance of an uncertified antenna should be checked after installation to ensure satisfactory operation.

I already use an ADS-B In traffic receiver - why do I need a TN72?
Many pilots have ADS-B In traffic receivers, but it is important to also have a certified Mode S and ADS-B Out solution. A Trig transponder and TN72 provides a high quality output which is visible to all ADS-B In traffic products. In contrast using an uncertified GPS will make you invisible to certain popular traffic receivers which reject uncertified GPS traffic information.

Can I use a TN72 X GPS outside of the U.S. ?
At the current time the use of a TN72 X (configured to SIL3) is only recommended in the U.S. by light-sport and experimental types. This configuration should be avoided elsewhere as TABS is appropriate transponder setting in Europe for both gliders and powered aircraft.

Can the TN72 be used in Australia and New Zealand
At the current time the TN72 can be used for gliders, balloons and lighter than air types. Regulators are considering if TABS technology might be suitable for other types, a decision is expected later in 2018.

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