See www.lk8000.it/about.html for what you can actually do with a flarm
when you want to follow someone..

You can actually "see" the IAS, and thus know its MC, and even if the vario
values are scrambled when you are far away from the "target", still their
averages is valid.
I mean, in 4-5 years we discovered, here in europe, many different
applications for Flarm.

Something that has not been discussed here, is the fact that Flarm does
actually stores in the log the position of gliders seen during the fligth.
This was critical to find a friend lost during a competition in Rieti, last
year.

Everything is nice and smooth in Flarm, except for one thing: they use a
closed proprietary protocol, and thus they operate in monopoly.
However, to be honest their products are excellent and they have a really
good pricing policy.
When you buy a Flarm IGC you also get a logger, at an unbeatable value for
that price.

Also Butterfly avionics are doing wonderful things.

paolo