Why shouldn't it be compatible? The FLARM organisation isn't against
third party devices using the FLARM-Protocol. They just want not be
accuses by US courts if somebody claim for damages.

This is the german statement from the FLARM folks:
"Die teilweise extremen Haftpflichtforderungen aus dem
nordamerikanischen Raum haben uns dazu veranlasst, entsprechende klare
Einschränkungen zu erlassen. Es obliegt dem Benützer von Flarm und dem
Kommandanten, Flarm gemäss den Betriebsbedingungen und -einschränkungen
zu verwenden. Flarm Technology kann diesbezüglich keine Ausnahmen gewähren."

Further they wrote, that the FLARM radio communication protocol is
available against a small protective charge. FLARM compatible devices
need a unique ID to work properly. This IDs will be distributed by the
FLARM folks against an adequate fee.

Andreas

Eric Greenwell schrieb:
Ramy wrote:
What prevents a US manufacture to produce a Flarm/ADS-B compatible
device, similar to what was done in Australia?

It wouldn't have to be compatible, as no one will fly their glider from
the US to Europe or Australia. The very small number of motorgliders
that might make that trip can make arrangements to buy, borrow, or rent
one when they get there. Life is simpler if you don't need the
compatibility, and might made the FLARM folks sleep better at night, too.