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Frank, I've seen some damage control pads that were actually being used as fenders. Basically, a canvas covered closed-cell foam pad about 3'x5' with heavy grommets in each corner. You could do the same thing with settee cushions--but unless someone had grommets pre-installed, you'd have to cut some fast holes to run the lines.
The idea is to attach four lines and use them as a bridle, pull the patch over the OUTside of the hole, and let the water pressure hold it over the hole, with the lines holding it in that location. And then complete a leisurely repair from the inside.
If I was sailing north of Vancouver, with all the log floats and deadheads, I think I'd want the patch, or at least the pre-installed grommets, on board. But I'm not, so I don't worry about that.