Page:Victory at Sea - William Sowden Sims and Burton J. Hendrick.djvu/176

158 that it outranged the Dunraven's gun and could safely give chase. The decoy merchantman apparently put on extra steam when the submarine started in her direction at top speed; here, again, however, the proper manœuvre was not to run too fast, for her real mission was to get caught. On the other hand, had she slowed down perceptibly, that in itself would have aroused suspicion; her game, therefore, was to decrease speed gradually so that the U-boat would think that it was overtaking its enemy by its own exertions. All during this queer kind of a chase the submarine and the cargo ship were peppering each other with shells, one seriously, the other merely in pretence. The fact that a naval crew, with such a fine target as an exposed submarine, could shoot with a conscious effort not to hit, but merely to lure the enemy to a better position, in itself is an eloquent evidence of the perfect discipline which prevailed in the mystery ship service. Not to aim a fair shot upon the detested vessel, when there was a possibility of hitting it, was almost too much to ask of human nature. But it was essential to success with these vessels never to fire with the intention of hitting unless there was a practical certainty of sinking the submarine; all energies were focussed upon the supreme task of inducing the enemy to expose itself completely within three or four hundred yards of the disguised freighter.

In an hour or two the submarine landed a shot that seemed to have done serious damage. At least huge clouds of steam arose from the engine-room, furnishing external evidence that the engines or boilers had been disabled. The submarine commander did not know that this was a trick; that the vessel was fitted with a specially arranged pipe around the engine-room hatch which could emit these bursts of steam at a moment's notice, all for the purpose of making him believe that the vitals of the ship had been irreparably damaged. The stopping of the ship, the blowing off of the safety valve, and the appearance of the "panic party" immediately after this ostensible hit made the illusion complete. This "panic party" was particularly panicky; one of the lifeboats was let go with a run, one fall at a time, thus dumping its occupants into the sea. Ultimately, however, the struggling swimmers were picked up and the boat rowed away, taking up a position where