The expansion of aviation in the navy has been of gratifying proportions and effectiveness. On July 1, 1917, naval aviation was still in its infancy. At that time there were only 45 naval aviators. There were officers of the navy, Marine Corps, and Coast Guard who had been given special training in and were attached to aviation. There were approximately 200 student officers under training, and about 1,250 enlisted men attached to the Aviation Service. These enlisted men were assigned to the three naval air stations in this country then in commission. Pensacola, Fla., had about 1,000 men, Bay Shore, Long Island, N.Y., had about 100, and Squantum, Mass., which was abandoned in the fall of 1917, had about 150 men. On July 1, 1918, there were 823 naval aviators, approximately 2,052 student officers, and 400 ground officers attached to naval aviation. In addition, there were more than 7,300 trained mechanics, and more than 5,400 mechanics in training. The total enlisted and commissioned personnel at this time was about 30,000. THE SHIPS On the day war was declared 197 ships were in commission. To-day there are 2,003. In addition to furnishing all these ships with trained officers and men, the duty of supplying crews and officers of the growing merchant marine was undertaken by the navy. There has not been a day when the demand for men for these ships has not been supplied--how fit they were all the world attests--and after manning the merchant ships there has not been a time when provision was not made for the constantly increasing number of ships taken over by the navy. During the year the energy available for new construction was concentrated mainly upon vessels to deal with the submarine menace. Three hundred and fifty-five of the 110-foot wooden submarine chasers were completed during the year. Fifty of these were taken over by France and 50 more for France were ordered during the year and have been completed since July 1, 1918. Forty-two more were ordered about the end of the fiscal year, delivery to begin in November and be completed in January. Extraordinary measures were taken with reference to destroyers. By the summer of 1917 destroyer orders had been placed which not only absorbed all available capacity for more than a year, but required a material expansion of existing facilities. There were under construction, or on order, in round figures, 100 of the thirty-five-knot type.