A surveyor went over the hull measuring plate thickness today. This showed a pretty consistent 4mm deck, 4.5mm on the hull and 8mm on the keel and hull sole. The one spot that gives an concern is a patch about 0.5m square around the inlet and outlet for the heads. Given the amount of scale on this patch on the inside it suggests there has been some leaking. Given we aim to move the heads aft in the long term, I think we will re-plate this are and get rid of the through hulls. It does mean that moving the heads will have to be done before launch. Looking on the bright side, the hull is every bit as good as I thought – that’s one more potential major cost that can be crossed off.