On Aug 9, 9:45*am, Mike Schumann
wrote:

Why not require ADS-B units instead. *Then you'd get the advantages of
FLARM, but you'd also see all of the transponder equipped GA aircraft
(assuming that there was a ground station in the area).

Perhaps because glider pilots would be overwhelmed by nuissance alerts
when contest flying? I have already experienced my PCAS becoming
close to useless as more gliders are fitted with transponders. I
don't need another system crying wolf all the time.

FLARM uses intelligent alerting based on glider flight
characteristics. It has been reported that the nuissance alerting
frequency low enough that it is still useful in high glider traffic
densities.


Andy