The FLIP research vessel (Floating Instrument Platform) is the only ship in the world having the ability to flip from a horizontal position to a vertical position while at sea.
During the flip, the crew stand on the outside decks. Scientists and crewmembers literally walk up the walls to stay upright. Suddenly, the aft side of the barge becomes its floor. That makes for some ingenious engineering feats in equipping its bridge, galley, crew quarters and scientific laboratory. Even its head, or bathroom, had to be constructed to operate in a vertical and horizontal position.