One of the most essential factors in making ships safe is the construction of proper bulkheads to divide a ship into water-tight compartments in case of injury to her hull. Of the modern means of forming such compartments, and of the complete and automatic devices for operating the watertight doors which connect them, a full explanation has already been given in the description of the Titanic’s physical features, to which the reader is referred. A wise precaution usually taken in the case of twin and triple screw ships is to arrange the bulkheads so that each engine is in a separate compartment, as is also each boiler or bank of boilers and each coal bunker.
Then there are submarine signals to tell of near-by vessels or shores. This signal arrangement includes a small tank on either side of the vessel, just below the water line. Within each is a microphone with wires leading to the bridge. If the vessel is near any other or approaching shore, the sounds; conveyed through the water from the distant object are heard through the receiver of the microphone. These arrangements are called the ship’s ears, and whether the sounds come from one side of the vessel or the other, the officers can tell the location of the shore or ship near by. If both ears record, the object is ahead.
The construction of life-boats adapts them for very rough weather. The chief essentials, of course, are ease in launching, strength in withstanding rough water and bumping when beached; also strength to withstand striking against wreckage or a ship’s side; carrying capacity and lightness. Those carried on board ship are lighter than those used in life-saving service on shore. Safety is provided by air-tight tanks which insure buoyancy in case the boat is filled with water. They have also self-righting power in case of being overturned; likewise self-emptying power. Life-boats are usually of the whaleboat type, with copper air-tight tanks along the side beneath the thwarts, and in the ends.
Life-boats range from twenty-four to thirty feet in length and carry from thirty to sixty persons. The rafts carry from twenty to forty persons. The old-fashioned round bar davits can be got for $100 to $150 a set. The new style davits, quick launchers in type, come as low as $400 a set.
According to some naval constructors, an ocean steamship can carry in davits enough boats to take care of all the passengers and crew, it being simply a question as to whether the steamship owners are willing to take up that much deck room which otherwise would be used for lounging chairs or for a promenade.
Nowadays all life-boats are equipped with air tanks to prevent sinking, with the result that metal boats are as unsinkable as wooden ones. The metal boats are considered in the United States Navy as superior to wooden ones, for several reasons: They do not break or collapse; they do not, in consequence of long storage on deck, open at the seams and thereby spring a leak; and they are not eaten by bugs, as is the case with wooden boats.
Comparatively few of the transatlantic steamships have adopted metal life-boats. Most of the boats are of wood, according to the official United States Government record of inspection. The records show that a considerable proportion of the entire number of so-called “life-boats” carried by Atlantic Ocean liners are not actually life-boats at all, but simply open boats, without air tanks or other special equipment or construction.
{illust. caption = CHAMBERS COLLAPSIBLE LIFE RAFT}
Life-rafts are of several kinds. They are commonly used on large passenger steamers where it is difficult to carry sufficient life-boats. In most cases they consist of two or more hollow metal or inflated rubber floats which support a wooden deck. The small rafts are supplied with life-lines and oars, and the larger ones with life-lines only, or with life-lines and sails.
The collapsible feature of the Chambers raft consists of canvas-covered steel frames extending up twenty- five inches from the sides to prevent passengers from being pitched off. When the rafts are not in use these side frames are folded down on the raft.
The collapsible rafts are favored by the ship-owners because such boats take up less room; they do not have to be carried in the davits, and they can be stowed to any number required. Some of the German lines stack their collapsible rafts one above another on deck.
Lewis Nixon, the well-known ship designer, suggests the construction of a pontoon to be carried on the after end of the vessel and to be made of sectional air-tight compartments. One compartment would accommodate the wireless outfit. Another compartment would hold drinking water, and still another would be filled with food.
The pontoon would follow the line of the ship and seem to be a part of it. The means for releasing it before the sinking of the vessel present no mechanical problem. It would be too large and too buoyant to be sucked down with the wreck.
The pontoon would accommodate, not comfortably but safely, all those who failed to find room in the life- boats.
It is Mr. Nixon’s plan to instal a gas engine in one of the compartments. With this engine the wireless instrument would remain in commission and direct the rescuers after the ship itself had gone down.
Life-preservers are chiefly of the belt or jacket type, made to fit about the body and rendered buoyant by slabs of cork sewed into the garment, or by rubber-lined air-bags. The use of cork is usually considered preferable, as the inflated articles are liable to injury, and jackets are preferable to belts as they can be put on more quickly.
Life-buoys are of several types, but those most common are of the ring type, varying in size from the small one designed to be thrown by hand to the large hollow metal buoy capable of supporting several people. The latter are usually carried by sea-going vessels and are fitted with lamps which are automatically lighted when the buoy is dropped into the water.
American ocean-going steamers are required to have some approved means of firing lines to the shore. Cunningham rockets and the Hunt gun are largely used. The inaccuracy of the rocket is of less importance when fired from a ship than when fired from shore.
CHAPTER XXVIII. TIME FOR REFLECTION AND REFORMS
IT is a long time since any modern vessel of importance has gone down under Nature’s attack, and in general the floating city of steel laughs at the wind and waves. She is not, however, proof against disaster. The danger lies in her own power—in the tens of thousands of horse power with which she may be driven into another ship or into an iceberg standing cold and unyielding as a wall of granite. In view of this fact it is of the utmost importance that present-day vessels should be thoroughly provided with the most efficient life-saving devices. These would seem more important than fireplaces, squash-courts and many other luxuries with which the Titanic was provided. The comparatively few survivors of the ill-fated Titanic were saved by the life-boats. The hundreds of others who went down with the vessel perished because there were no life-boats to carry them until rescue came.
The survivors urge the need of reform. In a resolution drawn up after the disaster they said:
“We feel it our duty to call the attention of the public to what we consider the inadequate supply of life-saving appliances provided for the modern passenger steamships and recommend that immediate steps be taken to compel passenger steamers to carry sufficient boats to accommodate the maximum number of people carried on board. The following facts were observed and should be considered in this connection: The insufficiency of life- boats, rafts, etc.; lack of trained seamen to man same (stokers, stewards, etc., are not efficient boat handlers); not enough officers to carry out emergency orders on the bridge and superintend the launching and control of life-boats; the absence of search lights.
