I read the requirements a little more carefully, and it is true that
ADS-B Out, as currently specified must be WAAS, etc. My bad.
However, eventually the FAA will figure out that it is in everybody's
best interest for low-cost units to become available, especially, for
the sport/antique/glider/etc community that has no way to install a
fully compliant unit. The FLARM being sold into European glider
community does all the "important" functions of ADS-B Out/In for
enabling collision avoidance at the $1000 cost level. Works about the
same too, except for lower power Out transmission. People buying
Cirrus and above aircraft will have no problem with the $10,000 cost
level. Garmin will be happy to serve them. FLARM and ZAON, etc will
be happy to serve the kilobuck market.

K l e i n

You have more faith in the FAA than I do. Have you read the NPRM?
You may be right about Cirrus buyers but what if the cost to a Cessna
owner is over $20,000 USD? This NPRM apparently was not vetted with
the stakeholders prior to release.

After learning more about it I am not sure that UAT is even
needed....and the weather and traffic elements from this system may
also be unneeded system drivers.

My current guess is that retaining Mode-C for GA (perhaps expanding
the equipage if a worthwhile mid-air risk reduction can be proven) is
adequate.

Find a way to reduce the cost of XM weather. Ga folks who want
enhanced traffic detection can use flight following/traffic advisory
services from ATC and/or get a system such as offered by Zaon or
Monroy.

If the airlines, air taxi folks, cargo, etc want ADS-B...go for it.
They are assuming capacity improvements when the NPRM does not
guarantee that separation standards will happen.

Ron Lee