Bulkheads A and B forward, and P aft, had no openings in them. All the other bulkheads had openings in them, which were fitted with water-tight doors. Bulkheads D to O, both inclusive, had each a vertical sliding water-tight door at the level of the floor of the engine and boiler rooms for the use of the engineers and firemen. On the Orlop deck there was one door, on bulkhead N, for access to the refrigerator rooms. On G deck there were no water-tight doors in the bulkheads. On both the F and E decks nearly all the bulkheads had water-tight doors, mainly for giving communication between the different blocks of passenger accommodation. All the doors, except those in the engine-rooms and boiler rooms, were horizontal sliding doors workable by hand, both at the door and at the deck above. There were 12 vertical sliding water-tight doors which completed the water-tightness of bulkheads D to O, inclusive, in the boiler and engine rooms. Those were capable of being simultaneously closed from the bridge. The operation of closing was intended to be preceded by the ringing from the bridge of a warning bell. These doors were closed by the bringing into operation of an electric current and could not be opened until this current was cut off from the bridge. When this was done the doors could only be opened by a mechanical operation manually worked separately at each door. They could, however, be individually lowered again by operating a lever at the door. In addition, they would be automatically closed, if open, should water enter the compartment. This operation was done in each case by means of a float, actuated by the water, which was in either of the compartments which happened to be in the process of being flooded. There were no sluice valves or means of letting water from one compartment to another. DETAILED DESCRIPTION. The following is a more detailed description of the vessel, her passenger and crew accommodation, and her machinery. WATER-TIGHT COMPARTMENTS. The following table shows the decks to which the bulkheads extended, and the number of doors in them: