On Thursday, November 1, 2018 at 8:15:05 AM UTC-4, Roy Garden wrote:
At 10:49 01 November 2018, Per Carlin wrote:
I would say that Lead & Follow has to be performed as close as possible
bet=
ween the leader and the followers. Absolutely not more than within
eyesight=
and therefore is there no need of any technical devices more than a
radio.=

Thanks Per,
The issue I have is that I'm doing this in wave not thermal.
I want to leave the guys in lift and go off to check the next bit that
looks
good, actually is, before I call the guys to jump into it.

On recent flights around here (Scotland) I've come back to the same place
4 hours later and the wave is still running. So there are less issues with
lift
changing between me marking it and the guys using it. (not zero, but less)

The issue here is that the terrain is generally unlandable.
The Sink can be horrific.
And we are usually operating in winds stronger than 50kts at cruising alt..
None of these things are familiar to the guys asking for the lead n
follow.

So I want to be able to leave the guys in lift and get 10-15k away from
them to check the next bit.

We fly in conditions such as you describe in Northern NH & Maine US. Everyone is responsible for doing their own homework. Terrain is extremely technical, landables fairly sparse.

Pair / team flying tactics are very useful for figuring out the wave, but even sharp, well experienced pilots get a scare from time to time. A mile of altitude can go away with astonishing speed.

You do not need to be in visual contact to pass useful information to each other.

Use of any sort of GPS device including tracking is made difficult by high wind and often huge variation between heading and ground track. "North Up" probably a better option. Flarm does (or at least did, I have not flown the most recent releases in the wave) odd things when your ground speed is very low. It may consider you or your flying buddy a non-flying aircraft.

Happy to pair fly in such conditions. The other guy has to be 100% responsible for his own navigation, decision making, eventual landing. Not taking the job of shepherding around an ill prepared newbie.

best,
Evan / T8