The naval gun factory at Washington was enlarged to double its output. The navy powder factory and the Newport torpedo station had their capacity greatly increased and a large new mine-loading plant was constructed. A big projectile factory was begun in the summer of 1917, and the buildings were finished, the machinery installed and the plant in operation in less than a year.
Within a year and a half the work of the ordnance bureau of the navy increased by 2,000 per cent, its expansion including the gun, powder and projectile factories mentioned above. Plants for various purposes taken over by the bureau from private industry increased their output at once by large percentages, in one case, in which the product was steel forgings, 300 per cent. The depth bomb proved one of the most efficient means of fighting the submarine. It contains an explosive charge fitted with a mechanism which causes explosion at a predetermined depth under the water. An American type was developed and within a few weeks was being manufactured in large quantities, while manufacture of the British type was continued for their navy. A new gun, called the “Y” gun, was devised and built especially for firing depth charges. It made possible the throwing of these bombs on all sides of the attacking vessel, thus laying down a barrage around it. A star shell was developed which, fired in the vicinity of an enemy fleet, made its ships visible, our own remaining in darkness. Anti-submarine activities made necessary an enormous increase in the manufacture of torpedoes and torpedo tubes, which grew by several hundred per cent and far surpassed what had been thought the possibility of production.
The ordnance bureau of the navy developed a new type of mobile mount for heavy guns which, by the use of caterpillar belts, made them as mobile as field artillery although the weight and muzzle velocity of the huge projectile rendered impossible the use of a wheeled gun carriage. The entire gun and mount, weighing 38 tons, can be readily transported by this means over any kind of ground. Immense naval guns, originally intended for use on battle cruisers, were sent to France with railway mounts especially built for them by the navy. Their important and successful operations overseas are described in the chapter on “The Navy on Land.”
Smoke producing apparatus, to enable a ship to conceal herself in a cloud of smoke, was evolved of several kinds, for use by different types of vessels. A shell that would not ricochet on striking the water, when fired at a submarine, and so glance harmlessly away in another direction, was an immediate necessity, brought about by the conditions of sea warfare. After many experiments a shell was devised that on striking would cleave the water, to the menace of the submarine’s hull, and, equipped with a depth charge, was soon in quantity production. A heavy aeroplane bomb which united the qualities of a bomb with those of a depth charge and did not explode on striking the water was another development of the navy ordnance bureau, which also devised a nonrecoil aircraft gun which, after much experiment, was installed on our seaplanes and put into quantity production. Its success meant the passing of an important milestone in aircraft armament. An American device for detecting the sounds made by a submarine gave highly important aid to that phase of the war. The Navy Department equipped our own submarines, destroyers and chasers with them and furnished them in large numbers to the British navy.
Not only was there need for an immense production of mines and depth charges for ordinary uses, but the decision by the British to carry out the American Navy Department’s plans for a mine barrage across the North Sea, whose story is told in more detail in the chapter on “Working with the Allied Navies,” made necessary the production in enormous quantities of a new type of mine. Combination of the best types already in use and experiment with new features resulted in a satisfactory product of which large quantities were made and shipped abroad. All this need for high explosives caused a critical shortage and the supply of TNT, the standard charge for mines, aerial bombs and depth charges, was almost exhausted, because of the scarcity of toluol, its principal ingredient. In this menacing situation the navy’s bureau of ordnance began making exhaustive experiments which finally proved that xylol, the near chemical relative of toluol, could be used in its place. The resulting high explosive, to which was given the name TNX, proved to be the equal in every way of TNT and the building was ordered of a plant for the distillation of xylol which would make possible the production for the following year of 30,000,000 pounds of high explosives.
Armament had to be furnished for merchant ships, 2,500 of them, equipment for destroyers and submarine chasers, and all the multitude of requirements for ships on distant service and for the repair ships that accompanied them. All this increase in ships and plants and personnel called for an enormous increase in the amount of materials and stores it was necessary to provide for them. The greatest total of supplies bought for the Navy in any one pre-war year amounted to $27,000,000. But the greatest total for a single day during the war amounted to $30,000,000.
Among the giant tasks which the Navy undertook during the war was the building of an enormous structure in Washington for the housing of the Navy Department, of several immense storehouses, of which one in Brooklyn is said to be one of the largest storehouses in the world, the installation at Annapolis of the greatest high-power radio station yet erected, and the completion of the powerful radio plant at Pearl Harbor.
The Medical Department of the Navy increased under war conditions from 327 doctors to 3,074, dentists from 30 to 485, women nurses from 160 to 1,400, and Hospital Corps members from 1,585 to 14,718. Three hospital ships were added to its equipment, it had numerous hospitals and dispensaries scattered through Great Britain and France and its hospital service at home was enlarged from 3,000 to 17,000 beds.
The inventive ingenuity of the American people was apparently much attracted towards the problems of sea warfare in this conflict, for they began to send ideas, suggestions and devices to the Navy Department even before the United States became a belligerent. After that date the Consulting Board of the Navy, which has charge of such matters, was almost snowed under by these suggestions. During our participation in the war the Board examined and acted upon 110,000 letters, of which many included detailed plans or were accompanied by models of the contrivances which their writers hoped to have adopted. Most of them were either worthless or already known, but a comparatively small number were found valuable.
At the beginning of our war activities our naval roster listed over 65,000 officers and men, with 14,000 more in the Marine Corps. A year and a half later the Marines numbered 70,000 and in the Navy there were a little more than 497,000 men and women, for a goodly number of patriotic women had enlisted in order to undertake the duties of yeomen and so release able bodied men for active service. The total permanent personnel of the Navy, officers and men, had grown to 212,000. This rapid expansion had made necessary intensive training for both men and officers that was carried on with never ceasing activity at training stations on shore and on ships at sea in both home and foreign waters. In small-arms training alone a force of 5,000 expert instructors was built up who trained an average of 30,000 men per month.