PelicanI / Sailindog / Banshee, there was no damage in the case. Afterwards I went and helped the yacht tie up to a mooring and checked his hull. There were a couple of scratches that would probably polish out. The yacht was pretty quick to put out fenders.
I would agree that legally the boat that dragged would be a fault. But what I am more interested in is what do you say?
(In this case I think I heard the powerboat skipper "ah sh#t" when he could'nt get his engine started).