A ship's bilge is the lowest interior area of the vessel. Bilge may also refer to the turn of the bilge, the meeting of side and bottom shells. In a single bottom ship, the bilge will be the area between frames. A raised flooring with removable grates is often fitted overtop of the bilge to provide for movement about the compartment. In double-bottom ships, a couple bilge wells will be fitted to each compartment. In this use, the bilge serves as a collection for leaks, condensate, water on decks, and minor spillage.