I managed to go alongside the submarine, starboard side to, and called on her to surrender. To my surprise, I saw a man make a magnificent leap from the submarine’s deck into our waist, and the remainder of her crew move to do likewise. Not being prepared to repel boarders at that moment, I sheered off. The submarine altered across my bows and I rammed her, increasing to 185 revolutions to do so, and altering course in order to hit her forward diving rudders, so as to prevent her submerging.
Even if they had not yet left the submarine, they might already have started flooding the compartment in preparation for an escape, and if the flooding had gone beyond a certain point it would be impossible to get that door open again. I listened, but could hear nothing beyond the monotonous, pitiless sound of pouring water.