hans wrote:
But until that technology is available I happy fly with my FLARM
equipped gilder. But the cost of the FLARM is less than the cost of
installation of the Mode S transponder.

And yes, I have a Mode-S transponder in my glider, so that I'm visible
to the TCAS equipped guys.

The US has provided the option of ADS-B over the low power UAT
(Universal Access Transceiver) physical layer, so a Mode S transponder
is not required...

Marc