All these humane rules could well be observed by any ordinary cruiser; and they were, in fact, kept by the Emden and other German cruisers when harrying British commerce in the East. But it is obvious at the first glance that a submarine would be continually in difficulties over them. It would always be risky for so fragile and unhandy a vessel to board and search a big ship, which might prove to be armed with guns or bombs. No submarine could find room for merchant crews or passengers in her own small compartments, and no submarine could afford to spare a prize crew for even one prize, or the time and horse-power to tow her into port. In short, it was plain, from the first, that the legitimate cruiser game could not be played at all by submarine boats. The Government of the United States put the truth unanswerably in these words: ‘The employment of submarines for the destruction of enemy trade is of necessity completely irreconcilable with the principles of humanity, with the long existing undisputed rights of neutrals, and with the sacred privileges of non-combatants.’
‘Turning passengers and crews adrift in open boats.’
[See page [77].
The British Navy had an advantage here—the inestimable advantage of a force that could keep the sea against all its enemies. It was, therefore, possible for our submarines to stop an occasional ship with impunity, or to call up a destroyer and send a prize into port; and in the narrow waters of the Baltic and the Sea of Marmora, supply ships and merchantmen were captured and destroyed by them with every regard for the laws of humanity. But the German submarines had no fleet at sea to back their attempted blockade, and German war policy therefore took the downward course, hacking a way through the rules, and sacrificing, for the hope of victory, the very foundations of civilised human life. The U-boats began by turning passengers and crews adrift in open boats, no matter in what weather or how far from land. They went on to sink even great liners without search, and without warning; and they came finally down to the destruction of helpless men and women in boats, in order that the ships they had torpedoed might disappear without a trace—spürlos versenkt.
CHAPTER VI
SUBMARINE v. WAR-SHIP
The use of the submarine for attacking war-ships is, of course, perfectly legitimate, and the powers and possibilities of this weapon were much discussed before the War. Some writers of note believed that the day of the big battleship was practically over—that such vessels could be ‘pulled down’ with certainty by any enterprising submarine commander, without any corresponding risk to his own boat. Others, with cooler or more scientific heads, maintained that there is an answer to every weapon, and that the introduction of submarines would not change the principles of war. The result has shown that the latter school of opinion was right. The submarine has achieved some striking successes here and there against the larger ships of war, but has not rendered them obsolete or kept them from going about their true business, the control of the sea; and as time goes on, it is rather the submarine than the battle-ship which is found too vulnerable to challenge a fight, when neither has the advantage of surprise.