Rich,
We had a similar thing happen here.
A couple moving a Nacra 5.8 went into power lines at a regatta.
Unfortunately one fellow lost his life.
Instead of making everyone use plastic tops on their masts they put up signs to ensure people are warned.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!