which delivers oxygen underwater while creating a vacuum around it by pumping out the surrounding water primarily used for selfish cargo containers and anchors from sunken ships the diving bell ship resembles a cannon barrel when activated it attaches to the seabed and a compressor blows air into the diving bell expelling the remaining water through pressure before entering the diving bell the crew must adapt to the high pressure environment in a pressurized chamber once acclimated they can descend directly into the diving bell through a staircase inside a variety of sunken objects can be observed on the riverbed