Besides coast defence and harbour attack, there might possibly be a chance for our submarines in a fleet action. Of that, all that can be said now is that our Submarine Service is believed to have shown greater promptness and ingenuity in its preparations than the German Admiralty, and awaits the next naval engagement with eager anticipation. But already it has been found practicable to use our submarines for two very important kinds of work, to an extent which was certainly quite unforeseen. One of these is the chase and destruction of enemy submarines--a kind of service which has been pronounced impossible, even in books written during the later stages of the War, but actual examples of which will be given in one of the chapters which describe our hunting methods. The other kind of work is the blockade of the enemy’s shipping trade and supply service, to be described when we come to the account of our submarine campaigns in the Baltic and Dardanelles. If we turn now to German naval policy, we shall come at once upon an interesting point, which has not been generally understood. We have been told that the German Admiralty, before the War, was completely deceived as to the value of the submarine. And Mr. Marley Hay has been often quoted as saying that, in several conversations in 1911, Admiral von Tirpitz ‘expressed emphatically his opinion that he considered submarines to be in an experimental stage, of doubtful utility, and that the German Government was not at all convinced that they would form an essential or a conspicuous part of their future naval programme.’ Mr. Hay shows clearly that this was not said with the object of misleading; for he was urging Tirpitz to build, and the Admiral continued to refuse. When war broke out, the German Navy had only twenty-seven submarines built against seventy-six British and seventy French boats, and she was only building twelve more, against the twenty and twenty-three on our side. This may have been partly due to a miscalculation of their efficiency; but the main reason was probably that the directors of German war policy were (at that time) preparing for a war in which our Navy was to take no part. The account with England was to be settled at a later date. The immediate intention was to deal with France and Russia, and the assistance of the Austrian and Italian submarines in the Mediterranean was of course reckoned upon.