Re: 6 Americans, 1 Brit vanish at sea
While I am certainly not anything like the type of expert that Bob Perry or Roger Long is, and I really am not certain at all of what may or may not have been the issue with the hull of the Nina, I would think that if the hull planking was unsound it could have been repaired for less than the FG wrap would have cost. I know that hull planks can be scarfed if only a portion is bad, and they can be replaced entirely if the whole plank is rotted. Obviously a wrap in FG is not going to fix a rotted and warped or sagging keel, in fact it might just make it worse by allowing water to become trapped behind the sheathing.
We may never know the whole story, and it would seem that some sort of enquiry into this should be done by those with far more knowledge of the actual situation than is available to most of us here on SN.
It is good to learn from your mistakes, but much better to learn from the mistakes of others...