Thanks for all the positivity.
Fiber hull? Or what?
The hull is ferro-cement. Basically steel reinforced concrete. Not a particularly common construction technique anymore, but was quite popular in the eighties, when she was first built. If it's done right, it's very strong and resilient. It's also quite quick to repair, but there is very little margin for error, when preparing the damaged area, and re-rendering the hull. Hopefully the hull repairs should be completed in the next week or two, and we should know pretty much straight away if the repair has been a success. After the hole is patched, we will be sheathing the hull, below the waterline, in a layer of epoxy fibre glass, which will add extra strength to the hull, and waterproof the concrete.