Inter Avionics Inc.
Serving the Pacific Northwest and beyond

ADS-B Questions Answered Here!

So, the mandate has come and gone and you still aren't equipped. Now what? What's available?

This is by no means a comprehensive list. These are devices we have installed or have experience with. There are many more options but these are what we have determined, as of Oct 2020, to be the best available solutions for fixed singles in GA.

If you don't see it mentioned here, there's probably a reason.

Appareo Stratus ES Series

Available with and without an internal WAAS receiver and with or without the popular Stratus receiver, the ES, ESG and ESGi are all decent solutions with a reasonable price. They are also, by far, the easiest of the panel mounts to install, which eases installation costs.

Best Use: Simple replacement of your current transponder with the ability to add ADS-B IN later (though you save some $$$ if you get the ESGi kit from the start).

Garmin GTX Series

Also available with and without a WAAS GPS receiver and with and without an ADS-B IN receiver, the GTX series transponders are legendarily reliable and are built with the same strength and quality that we've all come to expect of Garmin.

Best Use: There is essentially no difference between Appareo and Garmin's offerings in this. They are priced similarly and perform similarly. I would probably stick with Garmin if you already had a Garmin stack, just for cosmetic reasons.

Trig Avionics TT-3X Series

Trig makes a nice transponder at a reasonable price. It's a good ADS-B compliant mode S transponder. It's so nice, in fact, that some manufacturers are re-selling it as their own with a generous markup.

Best Use: Best for aircraft that already have a compatible GPS source, as it doesn't have a GPS receiver. You can add a TN-72 but then the costs make it about the same as a GTX or ESG install.

Trig Avionics TT-22

Same performance and quality as the TT-3X, but in a package with an integrated encoder and a remote head.

Best Use: Paired with their receiver, this makes for a very flexible device that can be installed in nearly anything. No space in your Citabria? Want to save weight in your glider? This might save your day.

uAvionix tailBeacon

If you were considering a GDL 82 then you probably want to go with this, instead. It provides the same result but the installation generally takes less than an hour.

Best Use: If you're running a fresh transponder, you never plan on leaving the US, you have a standard grimes assembly for your tail-light and you're on a strict budget.

So now what?

Decide what you're going to do with the aircraft. If you're going to be flying into and out of busy airspaces, please, get ADS-B IN. It can save your life.

If you're kitting up a bushplane, bear in mind that UAT solutions like the GDL and the tailBeacon aren't legal for Canadian airspace.

Above all, don't hesitate to stop by and ask or even call in if you have any questions.