The hull space was divided into twelve watertight compartments, any two of which could be flooded without risk of the ship sinking, connected by 35 hydraulically operated watertight doors. A critical flaw in the arrangement of the watertight compartments was that sliding doors to the coal bunkers needed to be open to provide a constant feed of coal whilst the ship was operating, and closing these in emergency conditions could be problematic. The ship had a double bottom with the space between divided into separate watertight cells. The ship's exceptional height was due to the six decks of passenger accommodation above the waterline, compared to the customary four decks in existing liners.