A couple of days ago I noted that Polish divers had located the wreck of the Nazi aircraft carrier Graf Zeppelin. 2 Guys in Poznan, who are, um, these two guys in Poznan, note the location. One of the two guys recently vacationed in the area and wonders about other WWII incidents that the Poles would like more info about.
Go check out Like a Lead Zeppelin?

the sinking of the william gustoff. Not for rookies http://www.deepimage.co.uk/wrecks/wilhelm-gustoff/gustloff_main.htm