I was looking for an article that mentioned something about a mini sub blowing up a barge with a torpedo. I didn't find it.
but this caught my eye.
http://the-wanderling.com/hoover_dam.html
stop the presses!!!
this is a wild story where a german u-boat was supposed to go up the colorado river and torpedo the Hoover dam.
the way they were to do this was to dismantle the submarine into pieces and truck them and reassemble them back in place at the final designation point. the first part of the plan was successful, but he 2nd part of the plan failed.
interesting story!
who ever came up with this plan over thought and over-engineered this rube gold-berg plan. that's very german thinking! lol!
simpler plan would have been to truck a 1 pound torpedo up steam from the dam. put it on a boat. get close enough to the dam and launch it. boat should make it back to shore before torpedo hit dam.