On Thu, 14 Oct 2010 13:43:34 -0500, Mike Schumann
wrote:

For FLARM to be effective, everyone has to install.

From my point of view, this is totally false.

I require my Flarm unit to help me spot gliders I may have not seen
yet. If one of those is flarm-equipped, it will (wiht a high
probability, not certainly) warn me of it's existence and position.
And it does this very, very well.
It will also trigger an alarm if the projected cone of possible
trajectories may interfere with my own path.

If other gliders are not equipped, it won't bother the functions of my
Flarm, nor I will suffer for this. I will keep on relying on my vision
for separation, like I always do. Maybe I will spot them later, maybe
I won't see them at all.

They just don't know what they're missing. Or.. what gliders they're
not spotting.

But, there's no such thing as a "Flarm system". There are Flarms, and
Flarms work.

Aldo Cernezzi