The reasons which made it necessary, during the war, to hide from public view the work of the Grand Fleet no longer exist, and it will no doubt be of interest to the nation to learn something of its operations, especially as, for various justifiable reasons, few despatches were issued dealing with its activities. So far as the Battle Fleet was concerned, the Battle of Jutland was the one exception, and that despatch was written and published when it was necessary to conceal a good deal from the enemy. As is inevitable, much of the information in this volume is of a technical character and, though interesting to seamen, may prove less so to the general reader. Those who take this view may decide that Chapters IV to X, inclusive, require only to be glanced at. Confidential matter, which it is still undesirable to make public, has been excluded from the book. Some of this may see the light in later years. The main portion of the book is written in narrative form, but where it is thought that an explanation may be useful, as to the reasons which governed any particular movement or decision, such reason is given in order that opportunity may be afforded the reader of understanding the purpose in view and the manner in which it was hoped to achieve it. In some parts of the book reference is made to the Germans being superior to us in _matériel_. There were many directions, however, in which war experience showed the correctness of our views and the wisdom of our pre-war policy. We did, in fact, obtain a margin of safety in the most essential type of vessel, the capital ship, and we did gain advantage from the heavier calibre of our guns. Naval policy is pursued in peace conditions under inevitable disadvantages in a democratic country, because there are many claims on the Exchequer. Reviewing our pre-war programmes of ship construction and equipment, and bearing in mind the unconsciousness of the nation generally as to the imminence of war, it is matter for satisfaction that the Boards of Admiralty from the beginning of the century were able to achieve so much, and that when at last war became inevitable the nation had in control of its destinies at Whitehall a First Lord and a First Sea Lord who, accepting their responsibility, mobilised the Fleet before war was actually declared, thus securing for us inestimable advantages, as, I hope, I have demonstrated in my record of the Grand Fleet. The years of strenuous work and training carried out by the officers and men of the Fleet, which should never be forgotten, had made of it a magnificent fighting machine, and bore ample fruit during the war.