The German II WW submarine wreck U 272, lying on the bottom north of the Hel Peninsula, was for the long time mistakenly named as U 346.
The Polish group of the BALTICTECH divers (Tomasz Stachura, Daniel Pastwa, Łukasz Pastwa, Tomasz Trojanowicz, Krzysztof Wnorowski, Tomasz Zwara, Marcin Jeleń & Jacek Kapczuk) made a three dives that allowed to collect all the crucial evidence that proved this wreck isn't U 346.
The video was made during this dives by Daniel Pastwa.
Final identification of the wreck was made in June 2013 by Daniel Pastwa, after a thorough historical research.
The identification wasn't easy, because the wreck is lying on 48 meters deep on the starboard side and it's over 90% covered by sand, bottom mud and thick fishing nets.
The movie was made as a recognition and identification video for the Polish Sea Authority, so excuse me it's length (~15 minutes).