On Wednesday, November 14, 2012 3:52:44 PM UTC-8, wrote:

You might also want to look art 978 (UAT) ADS-B - small and light. If you are not required to have a transponder, this is a good alternative (and if you already have on it is not affected) We do significantly reduce the price of the 1201 if it is bundled with an ADS-B radio so the price is not crazy

Actually UAT data-out in gliders is an _awful_ alternative.

Tim, you might want to do a bit of studying up on the sailplane/glider market.

Gliders in the USA already widely utilize PowerFLARM collision avoidance technology, the PowerFLARM (as used int the USA) includes a 1090ES receiver.

Even if a glider owner/pilot did not have a PowerFLARM they ought to be considerate to and aware that many other gliders they are likely to fly with will be equipped with these boxes with 1090ES data-in and to some extent those gliders will overtime likely equip with 1090ES data-out.

Gliders fly in many broad geographic locations and at times at low altitudes/close ground/mountain ridge etc. proximity where there is unlikely to be good ADS-R coverage so advocating UAT data-out for gliders may lead to lots of inter-operation issues, confusion, and is really not helpful.

And you may also not be aware of glider-community saftey programs run in some area where there are concerns about glider traffic near high density airline and fast jet traffic. There are quire a few glides int these areas that have already installed Mode C or Mode S transponders--critical for any compatibility with TCAS. The current transponder favored by glider pilots in the USA seems to be the Trig TT21/TT22. These are interesting as well to some purchasers as they provide a path to 1090ES data-out.

UAT data-in or data-out is effectively a dead duck in the USA glider market..

Darryl