In Europe, where great nations faced each other with enormous armies, there was an automatic safeguard against surprise. Decisive events could not occur till the armies were mobilised, and that took at least a fortnight. The supreme defence of France, for instance, could not therefore be overcome without a great battle in which the main strength of the French nation could be brought to bear. But no such assurance was enjoyed by the British Fleet. No naval mobilisation was necessary on either side to enable all the modern ships to attack one another. They had only to raise steam and bring the ammunition to the guns, But beyond this grim fact grew the torpedo menace. So far as gunfire alone was concerned, our principal danger was for our Fleet to be caught divided and to have one vital part destroyed without inflicting proportionate damage on the enemy. This danger was greatly reduced by wireless, which enabled the divided portions to be instantly directed to a common rendezvous and to avoid action till concentration was effected. Besides, gunfire was a game that two could play at. One could not contemplate that the main strength of the fleets would ever be allowed to come within range of each other without taking proper precautions. But the torpedo was essentially a weapon of surprise, or even treachery; and all that was true of the torpedo in a surface vessel applied with tenfold force to the torpedo of a submarine. Obviously there were limits beyond which it was impossible to safeguard oneself. It was not simply a case of a few weeks of special precautions. The British Navy had to live its ordinary life in time of peace. It had to have its cruises and its exercises, its periods of leave and refit. Our harbours were open to the commerce of the world. Absolute security against the worst conceivable treachery was physically impossible. On the other hand, even treachery, which required the co-operation of very large numbers of people in different stations and the setting in motion of an immense and complicated apparatus, is not easy to bring about. It was ruled by the Committee of Imperial Defence, after grave debate, that the Admiralty must not assume that if it made the difference between victory and defeat, Germany would stop short of an attack on the Fleet in full peace without warning or pretext. We had to do our best to live up to this standard, and in the main I believe we succeeded. Certainly the position and condition of the British Fleet was every day considered in relation to that of Germany. I was accustomed to check our dispositions by asking the Staff from time to time, unexpectedly, ‘What happens if war with Germany begins to-day?’ I never found them without an answer which showed that we had the power to effect our main concentration before any portion of the Fleet could be brought to battle. Our Fleet did not go for its cruises to the coast of Spain until we knew that the German High Seas Fleet was having its winter refits.