The foremost gun's crew leaped to their feet, and the deck-houses collapsed simultaneously, unmasking the foremost twelve-pounders.
The enemy was not easily taken by surprise, however. As the White Ensign appeared above the bulwarks of the Prize, the submarine fired two rounds from her guns. One hit the schooner's superstructure, and the other the water-line. This shell burst in the interior of the ship, severely wounding the Shipwright, who had rushed below to fetch one of the Lewis guns which were kept at the bottom of the ladder.
The Commander of the submarine put his helm hard over with the intention of ramming the schooner, but realising that she was inside his turning circle, reversed his helm and tried to escape. The next moment a shell from the schooner's after gun struck the foremost gun of the submarine, blowing it to atoms and annihilating the crew.
The Commanding Officer of the Prize, on realising that the submarine was heading away from him, rang down the order for full speed to the engine-room. Unknown to him, however, one engine was completely disabled, and the other, after driving the ship for about one hundred yards, also stopped. There was practically no wind, and the ship lay motionless on the water.
In the meanwhile, however, the gunlayer of the after gun had hit the conning tower of the submarine with his second shot, and demolished it; a deckhand at the same time raked the remainder of the survivors off her deck with the Lewis gun. A third shot from the after twelve-pounder struck the submarine in the vicinity of the engine-room and disabled her, but she continued to carry her way until about 500 yards from the Prize, when she came to a standstill, slewing broadside on to her vanquisher. There were no survivors visible, and a dull red glare from internal fires showed through the rents in her hull. At the thirty-sixth round she sank stern first, four minutes after the commencement of the action.
The "panic party" in the boat were then ordered to pull over the scene of the action and search for survivors. Darkness was falling fast, but they succeeded in picking up the Commander of the submarine, who had been knocked overboard by one of the bodies blown from the foremost gun, the Navigating Warrant Officer, and a Stoker Petty Officer. No other survivors could be found, and the boat returned with the prisoners, conscientiously "covered" by a Browning pistol in the fist of the Trawler Skipper at the helm.
While the search for survivors was being carried out by the ship's boat a survey of the damage on board the schooner revealed a serious state of affairs. The water was pouring through the shot-holes and stood a foot deep between decks. It continued to gain in spite of the employment of every available man on pumping and bailing, and the temporary plugging of the holes with hammocks and blankets.
Fortunately the sea was calm, with very little or no wind. The ship was put on the port tack and every possible device employed to list her to starboard, all the damage she had received being on the port side. The boat was swung out at the starboard davits and filled with water, coal and water shifted to the starboard side, and both cables ranged along the starboard scuppers. By these means sufficient list was obtained to lift the shot-holes clear of the water and to enable them to be temporarily patched.
Immediately after boarding the Prize the German submarine Commander offered his word of honour to make no attempt to escape, and promised that he and his men would do all in their power to assist. His parole was accepted, and both he and his men set to with a will, prisoners and captors working side by side to save the ship. The Navigating Warrant Officer voluntarily attended to the wounded and dressed their wounds.
As soon as it was realised that the water was no longer gaining on them, the attention of the Commanding Officer of the Prize was devoted to an attempt to restarting the motors. In the course of this work a fire broke out in the engine-room, due to sparks from the motor igniting the oil which had leaked from the damaged tank. This was successfully extinguished, and the wounded Stoker Petty Officer, assisted by the German Stoker Petty Officer, succeeded in getting one motor started. By 11.45 P.M. on April 30 all sail was set, and with one engine working the Prize shaped a course for the Irish Coast, 120 miles to the north-eastward.