[pmulcahy11b]

Here's a little tidbit I got from a Jane's newsletter. (I don't have the money for an actual subscription, so all I get is scraps.)

"A so-called 'bubble jet' effect, rather than a direct hit, is likely to have been responsible for the sinking of South Korean warship Chon An in the Yellow Sea (West Sea) off the coast of North Korea on 26 March. The chairman of the South Korean team investigating, Yoon Duk-yong, said: "The possibility of an underwater non-contact explosion is bigger than that of an underwater contact explosion, considering the shape of the severed surfaces and conditions." "The chances of an internal explosion, fatigue fracture or collision with a reef is zero," added Yoon, raising further the suspicion of North Korean involvement."

Note that I am behind in reading these, and this is from 04 May.