These areas, as has repeatedly been reported, are included approximately in a circle drawn from about Ushant to the north of Scotland. The most effective field for enemy activity is, of course, close into the Irish Sea and Channel approaches, where all lines must focus.
But, as stated above, the enemy also attacks occasionally well out to sea and in other dispersed areas with a view of scattering the limited anti-submarine forces available.
It therefore seems manifest that the war not only is, but must remain, in European waters, in so far as success or failure is concerned.
7. Speaking generally, but disregarding for the moment the question of logistics, our course of action, in order to throw our main strength against the enemy, would be to move all our forces, including the battleship fleet, into the war area.
8. In view of the nature of the present sea warfare as effected by the submarine, such a movement by the battleships would necessitate a large force of light craft—much larger than our peace establishment provided. In addition to all destroyers, adequate protection of the fleet would require all other available light craft in the service, or which could be commandeered and put into service—that is, submarines, armed tugs, trawlers, yachts, torpedo boats, revenue cutters, mine-layers and mine-sweepers, and in fact any type of small craft which could be used as protective or offensive screens.
9. In view of the shipping situation, as affected by the submarine campaign, it has been impossible to date to see in what way our battleships could be supplied in case they were sent into the war area. This refers particularly to oil-burning vessels. It would therefore seem unwise to recommend such a movement until we could see clearly far enough ahead to ensure the safety of the lines of communication which such a force would require.
10. It is to be observed, however, that even in case the decision were made to move the battleships into the war area, it would unavoidably be greatly delayed both in getting together the necessary screening forces and also in getting such craft across the Atlantic.
In the meantime, and while awaiting a decision as to the movements of the battleship fleet, the submarine campaign has become so intensive, and the available anti-submarine craft have been so inadequate to meet it, that the necessity for increasing the anti-submarine forces in the war area to the maximum possible extent has become imperative.
11. As long, therefore, as the enemy fleet is contained by the stronger British fleet in a position of readiness, it would not seem a disintegration of our fleet to advance into the war area all the light craft of every description which would necessarily have to accompany the fleet in case it should be needed in this area.
Such movements of the light craft would not in any way separate them strategically from the battleships, as they would be operating between the enemy and our own main body and based in a position to fall back as the main body approached, or to meet it at an appointed place. This advance of light forces, strategically, would mean no delay whatever to our heavy forces, should the time come for their entry into the active war zone.