I dont know. Reading that doesnt change my mind really. If even says there that the stern of the ship swung vertically. and quickly sank. Still. we are takiiing thread somewhat off course :-D
Well, the explosion broke her back. It was a pretty big explosion. Cant think of much else that would have done that.
When I was a kid, and living in Hova Villas I think. The handyman there was one of its crew, and was taken off before it sailed for some medical condition. Pretty lucky.