I spent a day at Oshkosh last Monday and had a chance to talk to Trig about their ADS-B plans.

The Trig TT22 Mode S Transponder is currently shipping and supports 1090ES ADS-B Out, if it is connected to an approved WAAS GPS position source. Up to now, approved GPS sources have been quite expensive.

The good news is that around Christmas, Trig is going to start shipping their new, as yet unannounced, TN72 GPS position source. I had a chance to see a prototype. It easily fits in the palm of your hand, weighs about 100 grams, and uses minimal power. While Trig wouldn't commit to a price, the people I talked to said that the unit would sell for less than $600.

Couple this with an ADS-B receiver ($500 - $850), an iPhone, iPad, or Android device, and a low cost app like Foreflight, etc., and you will have a full blown collision avoidance system that will accurately display and warn you about all other ADS-B and/or Transponder equipped aircraft in your vicinity. In addition you will be visible to all TCAS equipped commercial aircraft.

Trig indicated that their distributors have significant discounts available of groups and clubs that organize a volume purchase.

This is a great solution for glider pilots who fly near metropolitan airports and are mainly concerned about collision threats with other GA or commercial aircraft.

Get your checkbooks ready.