“The principles behind our North Sea Strategy are simple. One hundred years ago, had our main naval enemy been based on Cuxhaven and Kiel, we should have held him there by as close a blockade as the number of ships at our disposal, the weather conditions, and the seamanship of our captains made possible. The development of the steam-driven ship modified the theory of close blockade and, even without the torpedo, would have made, with the speed now attainable, an exact continuation of the old practice impossible. The under-water torpedo has simply emphasized and added to difficulties that would, without it, have been insuperable. But it has undoubtedly extended the range at which the blockading force must hold itself in readiness. To reproduce, then, in modern conditions the effect brought about by close blockade in our previous wars, it is necessary to have a naval base at a suitable distance from the enemy’s base. It must be one that is proof against under-water or surface torpedo vessel attack, and it must be so constituted that the force that normally maintains itself there is capable of prompt and rapid sortie, and of pouncing upon any enemy fleet that attempts to break out of the harbour in which it is intended to confine it. “The great bay in the Orkneys’ may, for all I know to the contrary, supply at the present moment the Grand Fleet’s main base for such blockade as we enforce. But there are a great many other ports, inlets, and estuaries on the East Coast of Scotland and England which are hardly likely to be entirely neglected. Not all, nor many, of these would be suitable for fleet units of the greatest size and speed, but some undoubtedly are suitable, and all those that are could be made to satisfy the conditions of complete protection against secret attack. Assuming the main battle fleet to be at an extremely northerly point, any more southerly base which is kept either by battle cruisers, light cruisers, or submarines may be regarded as an advance base, if for no other reason than that it is so many miles nearer to the German base. The Orkneys are 200 miles farther from Lowestoft than Lowestoft is from Heligoland. An Orkney concentration while making the escape of the Germans to the northward impossible, would leave them comparatively free to harry the East Coast of England. If, approaching during the night, they could arrive off that coast before the northern forces had news of their leaving their harbours, they would have many hours’ start in the race home. It is not, then, a close blockade that was maintained. This freedom had to be left the enemy--because no risk could be taken in the main theatre. It is assumed on the one side and admitted on the other, that Germany could gain nothing and would risk everything by attempting to pass down the Channel. The Channel is closed to the German Fleet precisely as the Sound is closed to the British. It is not that it is physically impossible for either fleet