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D3 said..
eSysman has an update with some unverified info, but sounds like pretty close approximation of what might have occurred.
Plus a little clip of a similar, very confronting, situation with a 45m yacht in Auckland some years ago.
Certainly going to make me rethink how I ventilate boats at anchor in the future.
Very rare and unlucky occurrence, but has highlighted some risks I've taken in the past with trailer sailers and cruising monos (wouldn't have needed waterspout to knock the boat flat)
Good link; thanks. Fortunately for us it's lots easier to get out of a smaller yacht with no corridors etc. Twelve minutes sounds like a long time but obviously insufficient for some if your first obstacle in a totally dark flooding chamber is a heavyish shut door on the roof followed by flooded corridors with big openings all over the (now) floor. Add to this total darkness and half asleep and possible concussion/other injury...
On the ventilation issue most small yachts only have opening hatches along the centerline although you don't have to get very big in the broad beam dingy styles these days before many are off centre- not that in those extreme conditions it would make much difference.
Some of the comments on the eSysman video are by top drawer designers of some note and people with very impressive experience.
The NZ video of the large cat being flipped and large mono knocked flat gives great context.
One thing I would like to know however it's whether the "lifting keel" was in fact that or perhaps more of a lightly balasted centreboard primarily designed to combat leeway.