The Navy Department saw at once that the most important aid its Aviation Service could give would be coast-wise work directed against the submarine menace. With that end in view it located its stations at strategic and important points all down the eastern coast of the United States, eleven in all, from Cape Cod to Key West, with another in the Canal Zone. Similarly its patrol stations were dotted up and down the shores of France, the British Isles and the Azores. On both shores of the Atlantic its dirigibles and seaplanes helped to escort outgoing convoys and went far out to sea to meet those coming in, eagle eyes sweeping the waters to watch for and warn against the sea vipers. The dirigibles were especially useful in this convoy work, as they were able to keep pace with the ships. In addition to this assistance in the convoy service the naval aviators ranged above the waters far out from shore, hunting submarines, looking for disabled vessels and for boats and wreckage carrying shipwrecked passengers and crews sent adrift on the ocean by submarine officers, and locating mines, and they carried on bombing operations by sea and land. The first United States forces to land in France for service against the enemy belonged to the Air Service of the Navy, which set ashore there within a month after our declaration of war five naval air pilots and 100 enlisted men. From this beginning grew the nine seaplane, one training, three dirigible and three kite stations that dotted the French shores from Dunkirk almost to the Spanish border. Most of these stations were used for convoy work, for submarine hunting and for searching for mines and wrecks. But at Dunkirk was a station for bombing operations which made day and night attacks on the German naval bases and supply depots along the Flanders coast, with especial attention to Zeebrugge and Ostend. After the British blockaded the entrances to those places the naval aviators, American, British and Belgian, coöperating in the work, dropped such a steady rain of bombs by day and night that the Germans were prevented from clearing away the obstructions. Two stations that were completed and in operation within ten months included a large aviation school and flying field at a lake near the coast, which specialized in bombing practice, and an aviation assembly and repair base with large machine shops and accommodations for the housing of their 5,000 men. The naval aviation stations along the French shores were so spaced that the entire coast line could be kept constantly under the observation of seaplanes and dirigibles. Some of the stations were located on uninhabited islets and others in tiny fishing villages on bleak peninsulas. This naval aviation force with its dirigibles and seaplanes coöperated so well with the sea patrol that between them they kept the whole of the French coast, for fifty miles from shore, safe from submarines through the last six months of the war.