The acoustic devices for locating submarines with which modern destroyers, escort, and patrol vessels, are provided have been greatly improved since 1918. So have the depth Charges with which submarines are attacked under water. Special antisubmarine schools have been formed for training personnel in the art of detection, while regular aircraft patrols and directional wireless' help to make the task of submarines far more hazardous. In moderate wea. ther flotillas of fast motor craft working with aircraft would doubtless be used for hunting and attacking submarines located in.proximity to the coast. In other words, while the potency of individual submarines has not greatly increased, the methods of dealing with them are many times more efficacious than they were twenty years ago, and are being constantly developed and improved.
However, submarine range of action has been extended, which means that regular convey systems for merchantmen, and mine-sweeping organizations for ports, may have to be brought into being in distant areas. In certain circumstances that may be visualized: there is hardly a sea in which(British vessels might not be attacked or a port in the Empire which might not be mined.
Text read from the printed page and cleaned; old type leaves the occasional error.