Hi Ed
An ATU is very helpful when people sit on your antenna wire. During our activation of Schesaplana in OE/VB-019 we noticed that after some time serveral people were sitting on half of the doublet wire on one side of the antenna. The wire obviousley had come down and people did not care about a wire on the ground.
I first did not notice, tuned them up as capacative load and made the contacts with still good reports.
Only when packing up we saw the wire on the ground.
73,
Peter (& Sylvia)