Here's the museum's page talking about UB-46:
www.dzkk.tsk.tr...
(oops. can't link directly to the page. click on "outdoor exhibitions" on the right. )
Says it was sunk in the Black Sea during WW1.
If it'd been found in a coal mine, you'd think they'd mention it.
[edit on 25-10-2009 by vox2442]


)has this to say: