Having watched Das Boot a couple of times, as pleasant a scenario as it is to imagine that the sub containing fleeing Rothschilds being slowly crushed on the sea floor, there were also early reports of the US navy and British navy both sending significant resources for the search. We all know the navies are "special" - any connection to the news that the UK navy is now guarding the Buckingham palace for the first time in 400 years? It's possible that they could have been apprehended and are being held somewhere. Just assembling some crumbs to make a slightly different bun.