As I mentioned in another thread, I made these guides for the old man's Zodiac Inflatable shop some years ago. He has since sold the business after 60 years. I've put the guides on a new site so as not to lose them. This is a basic guide for repairing large holes in PVC Inflatables.
Large Hole Repair | inflatable boat repairs
I'll put up another link tomorrow for PVC inflatable floor repairs, so that it's searchable on the forum for future reference.