The Navy furnished during the war to the United States Shipping Board 200,000 trained enlisted men, as well as 20,000 trained officers, to man its new ships, and the training for these men, in addition to that for fireman’s and seaman’s duty given at the regular naval training stations, was provided in nearly fifty different schools, from those for carpenters, cooks, yeomen, signalmen and divers, to those for mine sweeping, searchlight control and aviation aerography. On both ships of the Navy and naval-manned merchant ships sea-training constantly went on of those who had finished the courses at training stations, camps and schools, each ship of whatever type receiving its quota for a certain length of training in specified duties. Training bases in Europe for men who had already had some service aboard ship furnished material for refilling the crews of destroyers, part of whose complement had been sent back to this country to form the nucleus of new destroyer crews. The taking over by the Navy, upon our declaration of war, of all radio stations, the constantly increasing demand for radio operators in the Navy and on merchant vessels in the transport service and in commerce made necessary greatly enlarged radio training facilities. Two large naval radio schools were developed, one at Harvard University and the other at Mare Island Navy Yard, each of which gave a four-months’ course and graduated thousands of operators. In all the naval training camps, stations and schools the utmost effort was made, as in the army training camps, to conserve the physical, mental and moral well being of the young men preparing for sea service. The activities and beneficence of the Army Commission on Training Camp Activities have already been described. Under the same head and working along similar lines the Navy Commission on Training Camp Activities busied itself with the welfare of the men fitting for naval service and provided them with books, sports, lectures, music, theatrical entertainments, moving pictures. There was the same endeavor to develop musical and dramatic talent and direct its use among the men. The cordial coöperation of the same civilian organizations that did so much to promote the welfare of the soldiers in training aided also in safeguarding the naval recruits and in adding to their pleasure. The thorough organization of athletic sports in all the camps, both outdoors and indoors, provided seasonal recreation in the way of football, baseball, basket ball, hockey, running races, boxing, wrestling, rowing and swimming. In the last named sport, when it was found that less than half the young men gathering in the camps were able to swim, instructors were added to the list of athletic directors and told to make sure that every man in the camp learned to take care of himself in the water. PART ONE: SECTION III. IN THE AIR CHAPTER XV CREATING A NEW BRANCH OF WARFARE