http://www.telegraph.co.uk/news/obituar ... tuary.html
'Lieutenant Commander David Balme, who has died aged 95, led a boarding party which captured the secrets of Enigma from a German U-boat during the Battle of Convoy OB138 in May 1941, a turning point in the Battle of the Atlantic.
At midday on May 9 1941 Commander Joe Baker-Creswell, captain of the destroyer Bulldog, was about to order the ships of the 3rd Escort Group to leave west-bound trans-Atlantic Convoy OB318 in order to refuel at Iceland, when two merchant ships were torpedoed in quick succession. The torpedoes were fired from U-110, commanded by the U-boat ace Fritz-Julius Lemp, who failed to notice the proximity of the corvette Aubretia. Before his second salvo of torpedoes struck, Aubretia’s Lieutenant Commander Vivian Smith commenced a counter-attack with depth charges which blew U-110 to the surface.'
'The destroyer Broadway attempted to ram the surfaced U-boat and all three British ships opened fire with their guns. There was panic in U-110 and the crew abandoned ship: 15 men were killed or drowned including Lemp, and 32 survivors were picked up and hurried below deck in Aubretia. The action was over in minutes, and when Baker-Creswell stopped Bulldog alongside the U-boat he found it wallowing stern-down in the Atlantic rollers.
Balme was ordered to row across in Bulldog’s whaler to “get whatever you can out of her – documents, books, charts, and get the wireless settings, anything like that”. Jumping on to the U-boat’s outer hull he walked, revolver in hand, to the conning tower, at which point he had to holster his pistol in order to climb three ladders to the top of the tower and down again inside the U-boat to the control room. It was, he later recalled, “a very nasty moment because both my hands were occupied and I was a sitting target to anyone down below”.'
'Balme was very frightened; he expected the boat to sink, or scuttling charges to blow up at any moment, or to be overcome by chlorine from damaged batteries. The inside of the boat was dimly lit, there was a “nasty” hissing noise, and he could hear water slopping in the bilges. “I immediately went right for’d and right aft with my revolver in my hand to see if there was anybody about,” he said later. Noting that despite damage the U-boat was clean and well-kept and there was food on the table, but finding no Germans aboard, Balme called down the boarding party and “started ransacking all the treasures of the U-boat”.
In the wireless office, telegraphist Alan Long found “a funny sort of instrument, Sir, it looks like a typewriter but when you press the keys something else comes up on it”. Balme recognised this as “some sort of coding machine”, which he ordered to be unscrewed, and he organised a human chain to carry the machine and other equipment, charts and documents up the ladders and into the whaler.
Balme and Long had found an Enigma machine, the cipher device which the German U-boat service used to communicate to its fleet in, as the Germans thought, an unbreakable code. Besides that day’s settings they also recovered the daily settings until the end of June, which, when delivered later to Bletchley Park, enabled Alan Turing and his team to read the German naval “Hydra” code, the officer-only code, and, with the knowledge and experience gained, to go on to crack several other codes. Lemp’s crew were so demoralised and ill-disciplined that later in prison camp they talked freely to their interrogators about U-110 and about other boats in which they had served.'
'Balme and his men spent six hours inside U-110, where for some time they were left alone in the Atlantic, listening to the distant sound of depth charges while the 3rd Escort Group hunted another U-boat. When Bulldog returned, Balme passed a towline, and for a day U-110 was pulled towards Iceland, until about 11.00 on May 10 1941 when the German vessel reared its bows in the air and sank stern-first.
The loss of U-110 enabled the British to throw a cloak of secrecy over the whole affair, a cloak so dark that even when Captain Stephen Roskill, the official historian of the Royal Navy, wrote about the capture in 1959, only those already in the know were able to read between the lines and would have realised that the secret of the capture was not the U-boat but the Enigma material which was salvaged from it. Balme had been told that the truth of his secret capture would be kept forever, and was surprised when in the 1970s its secrets began to leak out.
Baker-Creswell and Smith were awarded the DSO, Balme the DSC, and Long the DSM, for enterprise and skill in action against enemy submarines.'
