Hmmm, 114500 tons moving at 15 knots, that's a colossal amount of inertia.

Twin skinned or not, it is almost certainly a 'very testing' configuration.

Anyone know what the double bottom config is 'supposed' to be able to withstand?

In terms of Gross Tonnage and speed especially, because I was under the impression that double skinning was more about containment of internal leaks rather than impact protection.